1400568 - Thunderbird Mac 52.3.0 frequently hangs after Send

Status: RESOLVED DUPLICATE of bug 1381485

(Thunderbird :: Untriaged, defect)

Description

[Glenn Reid]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/604.1.38 (KHTML, like Gecko) Version/11.0 Safari/604.1.38

Steps to reproduce:

Composed Message [as usual]
Clicked Send

Mac client 52.3.0, OS X 10.11.6.  This is recent bug, as of 52.3.0, never happened before (I'm a very heavy user and a veteran programmer).


Actual results:

Message sent successfully, but...
Thunderbird hangs (spinning pizza more than 10 minutes/Force Quit)

Crash Reporter does not come up in Force Quit, so I can't see where it's stuck.
This account Copies & Folders settings have "Place copy in Sent folder" and "Bcc this address" set


Expected results:

Doesn't always hang; trying to narrow down the cases where it does.  It has happened about 10 times in the last 3 days, requiring Force Quit.  Next time I will try to attach to it with "gdb" and maybe can get a location in the code if it's compiled with symbols.

Comment 1

[Wayne Mery (:wsmwk)]

52.3.0 is not exactly new - it's been out a month, so updated much longer than 3 days ago it might not be specific to the update. 

What addons do you have installed, and does the hang reproduce in safe mode?

If the problem reproduces in safe mode, it would be useful to know if your hang goes away by using a nightly build https://archive.mozilla.org/pub/thunderbird/nightly/latest-comm-central/thunderbird-57.0a1.en-US.mac.dmg

Comment 2

[Glenn Reid]

Only add-on is Theme Font & Size Changer 55.1.
52.3.0 is the current released Mac version -- it might have occurred intermittently since I installed it; I tend to forgive a certain number of crashes/hangs and just restart.  But it definitely seems worse the past few days.  I don't know how to run in Safe mode so I will look that up and see if I can reproduce it that way, and will try a nightly build as well and will update this bug if I learn anything new.

Comment 3

[Glenn Reid]

Okay, it happened again just now after sending maybe 20 emails.  I was running the Daily.app build that you sent in the above link, thunderbird-57.0a1.en-US.mac.dmg.

I tried to attach to it in XCode to see where it was hung, but accidentally killed it off before I could figure out how to see any kind of stack trace.  I'll keep trying.

Definitely a bug, and definitely a fairly new one, as I have used Thunderbird constantly for a long time and this just started happening, so one approach might be to just look through the change logs for anything that changed in the Send code.

One thing that *might* be a trigger is that I reached for the Messages menu while the Send was still in progress.  Not sure if that is part of it and it's some kind of race condition, but maybe.

Comment 4

[Glenn Reid]

Yes, reproduced it on the first try that time.  Here are steps to repeat:

- compose a message
- attach a file (which I think just makes Send take longer, making it easier to reproduce)
- Send the message
- while it is sending, click back on the main window so you get the menu bar
- Click the Messages menu

Hangs immediately.

Comment 5

[Glenn Reid]

I attached to the process with lldb (I'm more of a gdb guy, but I got a backtrace at least).  Looks like it's locked on a mutex.  I can't tell much else.

(lldb) bt
* thread #1: tid = 0xbd5eb, 0x00007fff8cf29de6 libsystem_kernel.dylib`__psynch_mutexwait + 10, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
  * frame #0: 0x00007fff8cf29de6 libsystem_kernel.dylib`__psynch_mutexwait + 10
    frame #1: 0x00007fff8c5b9e4a libsystem_pthread.dylib`_pthread_mutex_lock_wait + 89
    frame #2: 0x00007fff8c5b75f5 libsystem_pthread.dylib`_pthread_mutex_lock_slow + 300
    frame #3: 0x00007fff965a3786 OpenGL`CGLClearDrawable + 41
    frame #4: 0x00007fff96c8cb0c CoreFoundation`__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
    frame #5: 0x00007fff96c8ca9f CoreFoundation`___CFXRegistrationPost_block_invoke + 63
    frame #6: 0x00007fff96c8ca17 CoreFoundation`_CFXRegistrationPost + 407
    frame #7: 0x00007fff96c8c782 CoreFoundation`___CFXNotificationPost_block_invoke + 50
    frame #8: 0x00007fff96c49592 CoreFoundation`-[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1922
    frame #9: 0x00007fff96c487e5 CoreFoundation`_CFXNotificationPost + 693
    frame #10: 0x00007fff8c7d4f9a Foundation`-[NSNotificationCenter postNotificationName:object:userInfo:] + 66
    frame #11: 0x00007fff8f07626e AppKit`-[NSSurface _disposeSurface] + 169
    frame #12: 0x00007fff8f075cc7 AppKit`-[NSSurface setWindow:] + 66
    frame #13: 0x00007fff8ee39ba7 AppKit`-[NSView _setWindow:] + 2494
    frame #14: 0x00007fff8ee3c993 AppKit`-[NSView removeFromSuperview] + 471
    frame #15: 0x000000010cbf4336 XUL`-[ChildView delayedTearDown] + 22
    frame #16: 0x00007fff8c844dfe Foundation`__NSThreadPerformPerform + 279
    frame #17: 0x00007fff96c967e1 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    frame #18: 0x00007fff96c75f0c CoreFoundation`__CFRunLoopDoSources0 + 556
    frame #19: 0x00007fff96c7542f CoreFoundation`__CFRunLoopRun + 927
    frame #20: 0x00007fff96c74e28 CoreFoundation`CFRunLoopRunSpecific + 296
    frame #21: 0x00007fff8cc4d935 HIToolbox`RunCurrentEventLoopInMode + 235
    frame #22: 0x00007fff8cc4d76f HIToolbox`ReceiveNextEventCommon + 432
    frame #23: 0x00007fff8cca6606 HIToolbox`AcquireNextEventInMode + 54
    frame #24: 0x00007fff8cca3f94 HIToolbox`IsUserStillTracking(MenuSelectData*, unsigned char*) + 173
    frame #25: 0x00007fff8cdcb427 HIToolbox`TrackMenuCommon(MenuSelectData&, unsigned char*, SelectionData*, MenuResult*, MenuResult*) + 1719
    frame #26: 0x00007fff8ccb04fa HIToolbox`MenuSelectCore(MenuData*, Point, double, unsigned int, OpaqueMenuRef**, unsigned short*) + 555
    frame #27: 0x00007fff8ccb0230 HIToolbox`_HandleMenuSelection2 + 460
    frame #28: 0x00007fff8efe50fa AppKit`_NSHandleCarbonMenuEvent + 277
    frame #29: 0x00007fff8ee5a13d AppKit`_DPSNextEvent + 1906
    frame #30: 0x00007fff8ee59226 AppKit`-[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
    frame #31: 0x000000010cc23356 XUL`-[GeckoNSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 86
    frame #32: 0x00007fff8ee4dd80 AppKit`-[NSApplication run] + 682
    frame #33: 0x000000010cc2421a XUL`nsAppShell::Run() + 250
    frame #34: 0x000000010df5eaa9 XUL`nsAppStartup::Run() + 41
    frame #35: 0x000000010dfecc97 XUL`XREMain::XRE_mainRun() + 3991
    frame #36: 0x000000010dfed3d6 XUL`XREMain::XRE_main(int, char**, mozilla::BootstrapConfig const&) + 1398
    frame #37: 0x000000010dfed80f XUL`XRE_main(int, char**, mozilla::BootstrapConfig const&) + 239
    frame #38: 0x000000010a0a80cc thunderbird`main + 924
    frame #39: 0x000000010a0a7d04 thunderbird`start + 52

Comment 6

[Glenn Reid]

(In reply to Wayne Mery (:wsmwk, NI for questions) from comment #1)

Not quite sure how Bugzilla works, but hitting Reply button to draw your attention to the Comments I've added to the bug.  I can reproduce it now on the Daily build as well.

Glenn Reid

Comment 7

[Glenn Reid]

I have "bt all" output too but it's a lot of text so I'm not going to paste it here.  Let me know if you want it.

Comment 8

[Glenn Reid]

Hmmm.  Reproduced twice more just now without clicking Messages menu, but clicking in main message window.  I think I did that in all cases, even before going for the Messages menu.  I have reproduced it about 8 times today alone.

Comment 9

[Glenn Reid]

Any progress on this?  I spent a good amount of time making it reproducible and producing stack traces.  I'd be happy to fix it, too, but I don't know how to get the source code :)

Comment 10

[Wayne Mery (:wsmwk)]

(In reply to Glenn Reid from comment #9)
> Any progress on this?  I spent a good amount of time making it reproducible
> and producing stack traces.  I'd be happy to fix it, too, but I don't know
> how to get the source code :)

sorry for delay - we're really bogged down these days.  https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Build_Instructions/Simple_Thunderbird_build has info about getting the code

Before doing so, you should use a build with the latest code from https://archive.mozilla.org/pub/thunderbird/nightly/latest-comm-central/

Comment 11

[Wayne Mery (:wsmwk)]

Or, aother starting point, If you strongly feel this is a regression, find the regression range which will help identify the patch which caused the problem.  Tool at http://mozilla.github.io/mozregression/

Comment 12

[Wayne Mery (:wsmwk)]

Please see details of Mac issues at bug 1343480 and bug 1381485.
Waht do you think?

Comment 13

[Glenn Reid]

I can't believe bugzilla requires a 12-character password ... to file a bug report.  See my blog post on passwords for fun: https://glennreid.blogspot.com/2010/03/

Anyway....

It's not 1343480 (I already had spotlight turned off), is unlikely to be 1381485 (I don't use a lot of fonts, and just don't think that's it).

I actually downloaded and built the source code as per the link you posted a couple of months ago, and got it running, but couldn't reproduce the bug in the debugger. I also couldn't easily figure out how to point the build at my normal Thunderbird library, so it created an empty folder.

I believe that the hang may happen not in Send (as the emails always seem to send correctly) but in what happens right after that, which may be filing the copies to existing folders.  I have a very complicated mail setup with quite a few accounts, lots of aliases, etc, and some of them file back to original folder, some don't.  I'm trying to narrow that down.

I also have a LOT of email in my database, as I keep email dating back to (ahem) 1978, when I first started using email.  I know, I know.  I was young.  But still.

I have a feeling that I could reproduce the bug in the debugger if I could point the built app at my library, but haven't found the time to take it further.  My source snapshot is now a few weeks old, too, so I would want to update and rebuild before trying.

Meanwhile I've updated to the latest (52.5.0) and the bug still reproduces (to where I have to force quit) once or twice a day at least.

Comment 14

[Wayne Mery (:wsmwk)]

I agree, all these issues are likely hanging *after* the send. And there is now another example at bug 1422251.

> I have a feeling that I could reproduce the bug in the debugger if I could point the built app [Thunderbird] at my [Mac] library

What part of the library are you hoping to pick up?

> couldn't reproduce the bug in the debugger

Thanks for doing all that work.  Perhaps someone I have cc can offer advice

Comment 15

[Glenn Reid]

What I mean by library is just my pile of existing email.  The only way I know to launch the app as built with source is from the command line (as per the build instructions) but it doesn't seem to have the right environment to find my email database.

It smells like a race condition to me.  Hard to find, usually just from staring at source code.  The stack trace in the new bug you mention looks similar, and I see in both cases a mutex:

   *11  psynch_mtxcontinue + 0 (pthread + 31389) [0xffffff7f80f0ba9d] (blocked by pthread mutex owned by thunderbird (Thunderbird) [790] thread 0x304d9) 1-11

and a user notification:

[NSNotificationCenter postNotificationName:object:userInfo:]

It may be that the handler for the notification has the release for the mutex, but if something else happens faster (teardown of progress window?) the mutex stays locked.  Or vice versa.  Or something like that.  Seems pretty likely to be the mutex that is causing the hang (that's what they do!) so looking carefully at the lock/unlock conditions, specifically around the asynchronous notification, might give a clue.

Comment 16

[Wayne Mery (:wsmwk)]

Ah.  Your data is in the profile folder.  see https://support.mozilla.org/en-US/kb/profiles-tb  With your production THunderbird running do Help | Troubleshooting | Open Folder

With the code you built, you should be able to get to the profile by pointing it to the correct profile folder with information at https://support.mozilla.org/en-US/kb/using-multiple-profiles

Comment 17

[Wayne Mery (:wsmwk)]

Very strange that there isn't a shutdown crash report after a minute or two.
Does it still happen in latest nightly?

Comment 18

[Wayne Mery (:wsmwk)]

What happens if you disable notifications in preferences > General ?

Comment 19

[Wayne Mery (:wsmwk)]

Glenn,

Also, similar to bug 1381485, please try setting "Place copy in Sent folder" to a local folder rather than an imap folder

Comment 20

[Glenn Reid]

Sorry about the delay.  I tried disabling all notifications including system preferences Alerts and badging and that didn't seem to make a difference.  Still happens once or twice a day at least.  I will try the Place copy in Sent folder options as well.  I have quite a few accounts (22, to be exact), most of which are POP, though about 3 or 4 are IMAP.  I usually use "bcc myself" to keep copies, rather than "place copy in folder" but I will try to narrow it down to (a) whether or not it's specific to IMAP or POP, and (b) whether post-send actions such as filing in folders seem to affect it.

Comment 21

[cinymini]

If it helps, it’s occuring for me with two IMAP accounts (no POP), and only ever happened when composing mails with one of them but not the other. So if it’s specific to either IMAP or POP, it’s definitely not POP.

Comment 22

[Heikki Suonsivu]

I am seeing hangs, bug id 1440716.  It seems a bit different but it might be same.  My symptom is that after a while all connections get stuck "Connecting imap.gmail.com" or whatever.

The reason which makes me think my issue might be related is that as I cannot send emails, I seems to be able to get them sent almost consistently by clicking offline mode, clicking "Send later" in all stuck write windows, and going back to online mode, and usually it sends all the emails, and might also have other connectivity for a while.  If I go to offline mode, reading does not necessarily recover the same way, thunderbird stays stuck.  Restarting may or may not help.

I am also seeing connection here that I have huge inbox and gigabytes of email in my folders, and it going gradually worse makes me think that it may be related to size of email folders.

Comment 23

[Wayne Mery (:wsmwk)]

Can you try a nightly build from http://archive.mozilla.org/pub/thunderbird/nightly/latest-comm-central/thunderbird-60.0a1.en-US.mac.dmg

If so, what are the results?

Comment 24

[Wayne Mery (:wsmwk)]

(In reply to Glenn Reid from comment #20)
> Sorry about the delay.  I tried disabling all notifications including system
> preferences Alerts and badging and that didn't seem to make a difference. 
> Still happens once or twice a day at least.  I will try the Place copy in
> Sent folder options as well.  I have quite a few accounts (22, to be exact),
> most of which are POP, though about 3 or 4 are IMAP.  I usually use "bcc
> myself" to keep copies, rather than "place copy in folder" but I will try to
> narrow it down to (a) whether or not it's specific to IMAP or POP, and (b)
> whether post-send actions such as filing in folders seem to affect it.

Hi Glenn.

I think we only care about imap accounts.  So what happens if you alter account settings to put the sent messages in a "local" folder rather than the default imap folder?  (which worked in bug 1422251)

Comment 25

[Glenn Reid]

52.7.0 current version, reproduced just now with a POP account set to Place a Copy in [Sent on Local Folders] and also [Place replies in the folder of the message being replied to].

Message was delivered successfully, and the outoing Sent copy and copy in the reply folder both were intact when I restarted, so I think the hang is *after* all that filing is done.

Here is the hang report:

Date/Time:       2018-05-14 13:37:06 -0700
OS Version:      Mac OS X 10.11.6 (Build 15G19009)
Architecture:    x86_64
Report Version:  22

Command:         Thunderbird
Path:            /Applications/Thunderbird.app/Contents/MacOS/thunderbird
Version:         52.7.0 (52.7.0)
Parent:          launchd [1]
PID:             8537

Event:           hang
Duration:        0.99s (process was unresponsive for 24 seconds before sampling)
Steps:           10 (100ms sampling interval)

Hardware model:  MacPro6,1
Active cpus:     12

Fan speed:       789 rpm

--------------------------------------------------
Timeline format: stacks are sorted chronologically
Use -i and -heavy to re-report with count sorting
--------------------------------------------------

Heaviest stack for the main thread of the target process:
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 34933458) [0x111463ad2]
  10  -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454 (AppKit + 295462) [0x7fff96501226]
  10  _DPSNextEvent + 1067 (AppKit + 298486) [0x7fff96501df6]
  10  _BlockUntilNextEventMatchingListInModeWithFilter + 71 (HIToolbox + 198063) [0x7fff8fd875af]
  10  ReceiveNextEventCommon + 184 (HIToolbox + 198263) [0x7fff8fd87677]
  10  RunCurrentEventLoopInMode + 235 (HIToolbox + 198965) [0x7fff8fd87935]
  10  CFRunLoopRunSpecific + 296 (CoreFoundation + 560680) [0x7fff8a6a3e28]
  10  __CFRunLoopRun + 927 (CoreFoundation + 562223) [0x7fff8a6a442f]
  10  __CFRunLoopDoSources0 + 423 (CoreFoundation + 564871) [0x7fff8a6a4e87]
  10  __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 (CoreFoundation + 698337) [0x7fff8a6c57e1]
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 34745617) [0x111435d11]
  10  -[NSView removeFromSuperview] + 471 (AppKit + 178579) [0x7fff964e4993]
  10  -[NSView _setWindow:] + 2494 (AppKit + 166823) [0x7fff964e1ba7]
  10  -[NSSurface setWindow:] + 66 (AppKit + 2510023) [0x7fff9671dcc7]
  10  -[NSSurface _disposeSurface] + 169 (AppKit + 2511470) [0x7fff9671e26e]
  10  -[NSNotificationCenter postNotificationName:object:userInfo:] + 66 (Foundation + 28506) [0x7fff972eff5a]
  10  _CFXNotificationPost + 693 (CoreFoundation + 378853) [0x7fff8a6777e5]
  10  -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1922 (CoreFoundation + 382354) [0x7fff8a678592]
  10  ___CFXNotificationPost_block_invoke + 50 (CoreFoundation + 657282) [0x7fff8a6bb782]
  10  _CFXRegistrationPost + 407 (CoreFoundation + 657943) [0x7fff8a6bba17]
  10  ___CFXRegistrationPost_block_invoke + 63 (CoreFoundation + 658079) [0x7fff8a6bba9f]
  10  __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12 (CoreFoundation + 658188) [0x7fff8a6bbb0c]
  10  CGLClearDrawable + 41 (OpenGL + 26502) [0x7fff948f6786]
  10  _pthread_mutex_lock_slow + 300 (libsystem_pthread.dylib + 5621) [0x7fff93b2c5f5]
  10  __psynch_mutexwait + 10 (libsystem_kernel.dylib + 93670) [0x7fff94980de6]
 *10  psynch_mtxcontinue + 0 (pthread + 25357) [0xffffff7f80ef830d]


Process:         thunderbird (Thunderbird) [8537]
Path:            /Applications/Thunderbird.app/Contents/MacOS/thunderbird
Architecture:    x86_64
Parent:          launchd [1]
UID:             501
Task size:       237141 pages
CPU Time:        0.002s
Note:            Unresponsive for 24 seconds before sampling
Note:            1 idle work queue threads omitted

  Thread 0x11e23d5        DispatchQueue 1         10 samples (1-10)       priority 47 (base 47)
  <process frontmost, thread QoS user interactive (requested user interactive), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 34933458) [0x111463ad2] 1-10
    10  -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454 (AppKit + 295462) [0x7fff96501226] 1-10
      10  _DPSNextEvent + 1067 (AppKit + 298486) [0x7fff96501df6] 1-10
        10  _BlockUntilNextEventMatchingListInModeWithFilter + 71 (HIToolbox + 198063) [0x7fff8fd875af] 1-10
          10  ReceiveNextEventCommon + 184 (HIToolbox + 198263) [0x7fff8fd87677] 1-10
            10  RunCurrentEventLoopInMode + 235 (HIToolbox + 198965) [0x7fff8fd87935] 1-10
              10  CFRunLoopRunSpecific + 296 (CoreFoundation + 560680) [0x7fff8a6a3e28] 1-10
                10  __CFRunLoopRun + 927 (CoreFoundation + 562223) [0x7fff8a6a442f] 1-10
                  10  __CFRunLoopDoSources0 + 423 (CoreFoundation + 564871) [0x7fff8a6a4e87] 1-10
                    10  __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 (CoreFoundation + 698337) [0x7fff8a6c57e1] 1-10
                      10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 34745617) [0x111435d11] 1-10
                        10  -[NSView removeFromSuperview] + 471 (AppKit + 178579) [0x7fff964e4993] 1-10
                          10  -[NSView _setWindow:] + 2494 (AppKit + 166823) [0x7fff964e1ba7] 1-10
                            10  -[NSSurface setWindow:] + 66 (AppKit + 2510023) [0x7fff9671dcc7] 1-10
                              10  -[NSSurface _disposeSurface] + 169 (AppKit + 2511470) [0x7fff9671e26e] 1-10
                                10  -[NSNotificationCenter postNotificationName:object:userInfo:] + 66 (Foundation + 28506) [0x7fff972eff5a] 1-10
                                  10  _CFXNotificationPost + 693 (CoreFoundation + 378853) [0x7fff8a6777e5] 1-10
                                    10  -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1922 (CoreFoundation + 382354) [0x7fff8a678592] 1-10
                                      10  ___CFXNotificationPost_block_invoke + 50 (CoreFoundation + 657282) [0x7fff8a6bb782] 1-10
                                        10  _CFXRegistrationPost + 407 (CoreFoundation + 657943) [0x7fff8a6bba17] 1-10
                                          10  ___CFXRegistrationPost_block_invoke + 63 (CoreFoundation + 658079) [0x7fff8a6bba9f] 1-10
                                            10  __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12 (CoreFoundation + 658188) [0x7fff8a6bbb0c] 1-10
                                              10  CGLClearDrawable + 41 (OpenGL + 26502) [0x7fff948f6786] 1-10
                                                10  _pthread_mutex_lock_slow + 300 (libsystem_pthread.dylib + 5621) [0x7fff93b2c5f5] 1-10
                                                  10  __psynch_mutexwait + 10 (libsystem_kernel.dylib + 93670) [0x7fff94980de6] 1-10
                                                   *10  psynch_mtxcontinue + 0 (pthread + 25357) [0xffffff7f80ef830d] 1-10

  Thread 0x11e23de        DispatchQueue 2         10 samples (1-10)       priority 47 (base 47)
  <process frontmost, thread QoS user interactive (requested user interactive), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  _dispatch_mgr_thread + 52 (libdispatch.dylib + 32205) [0x7fff92416dcd] 1-10
    10  kevent_qos + 10 (libsystem_kernel.dylib + 98042) [0x7fff94981efa] 1-10
     *10  ??? (kernel + 5829920) [0xffffff800078f520] 1-10

  Thread 0x11e23e2        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  mach_msg_trap + 10 (libsystem_kernel.dylib + 69490) [0x7fff9497af72] 1-10
   *10  ipc_mqueue_receive_continue + 0 (kernel + 816784) [0xffffff80002c7690] 1-10

  Thread 0x11e23f4        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  kevent + 10 (libsystem_kernel.dylib + 97994) [0x7fff94981eca] 1-10
   *10  ??? (kernel + 5829920) [0xffffff800078f520] 1-10

  Thread 0x11e23f6        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __select + 10 (libsystem_kernel.dylib + 94330) [0x7fff9498107a] 1-10
   *10  ??? (kernel + 5991072) [0xffffff80007b6aa0] 1-10

  Thread 0x11e23fb        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e23fc        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e23fd        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e23fe        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e23ff        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2400        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2401        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2402        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2403        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2404        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2405        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2406        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2407        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2408        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2409        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e240a        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e240b        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x112586db1] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e240c        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  mach_msg_trap + 10 (libsystem_kernel.dylib + 69490) [0x7fff9497af72] 1-10
   *10  ipc_mqueue_receive_continue + 0 (kernel + 816784) [0xffffff80002c7690] 1-10

  Thread 0x11e240d        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2417        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2418        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794931) [0x10f1ee373] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e241a        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e241b        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e241d        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2420        10 samples (1-10)       priority 47 (base 47)
  <process frontmost, thread QoS user interactive (requested legacy, override user interactive), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? [0x8000000000000000] 1-10
    10  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 8326904) [0x10fb03ef8] 1-10
      10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
       *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2422        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2423        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2424        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2425        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2426        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2427        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2428        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2429        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e242a        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e242b        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e242c        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e242d        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2436        10 samples (1-10)       priority 47 (base 47)
  <process frontmost, thread QoS user interactive (requested user interactive), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  thread_start + 13 (libsystem_pthread.dylib + 4945) [0x7fff93b2c351] 1-10
    10  _pthread_start + 168 (libsystem_pthread.dylib + 14618) [0x7fff93b2e91a] 1-10
      10  _pthread_body + 131 (libsystem_pthread.dylib + 14749) [0x7fff93b2e99d] 1-10
        10  _NSEventThread + 149 (AppKit + 1699221) [0x7fff96657d95] 1-10
          10  CFRunLoopRunSpecific + 296 (CoreFoundation + 560680) [0x7fff8a6a3e28] 1-10
            10  __CFRunLoopRun + 1356 (CoreFoundation + 562652) [0x7fff8a6a45dc] 1-10
              10  __CFRunLoopServiceMachPort + 212 (CoreFoundation + 565524) [0x7fff8a6a5114] 1-10
                10  mach_msg_trap + 10 (libsystem_kernel.dylib + 69490) [0x7fff9497af72] 1-10
                 *10  ipc_mqueue_receive_continue + 0 (kernel + 816784) [0xffffff80002c7690] 1-10

  Thread 0x11e2437        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2439        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e243f        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e244c        10 samples (1-10)       priority 31 (base 31)   cpu time 0.001s
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e244e        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e2452        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  mach_msg_trap + 10 (libsystem_kernel.dylib + 69490) [0x7fff9497af72] 1-10
   *10  ipc_mqueue_receive_continue + 0 (kernel + 816784) [0xffffff80002c7690] 1-10

  Thread 0x11e2646        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e278b        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e278c        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e278d        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e27eb        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e4a09        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11e4a0a        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11f4b2b        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x11f4b2c        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x1225122        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x12662ca        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x1267a98        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x1267a9a        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x135807d        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x135cb90        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x135cb98        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x1457090        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x1625e7e        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x1660a85        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x17a482d        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x10f1ee9f9] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x1801c79        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
   *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x18900a6        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x189d2f1        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794931) [0x10f1ee373] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x189d58a        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x10f1ee38d] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x189d9ff        10 samples (1-10)       priority 54 (base 54)   cpu time 0.001s
  <process frontmost, process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  thread_start + 13 (libsystem_pthread.dylib + 4945) [0x7fff93b2c351] 1-10
    10  _pthread_start + 168 (libsystem_pthread.dylib + 14618) [0x7fff93b2e91a] 1-10
      10  _pthread_body + 131 (libsystem_pthread.dylib + 14749) [0x7fff93b2e99d] 1-10
        10  startIOThread(void*) + 147 (CoreVideo + 31145) [0x7fff972bb9a9] 1-10
          10  CVDisplayLink::runIOThread() + 511 (CoreVideo + 32465) [0x7fff972bbed1] 1-10
            10  CVDisplayLink::waitUntil(unsigned long long) + 232 (CoreVideo + 32984) [0x7fff972bc0d8] 1-10
              10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
               *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x189da02        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794931) [0x10f1ee373] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Thread 0x189da09        10 samples (1-10)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  10  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794931) [0x10f1ee373] 1-10
    10  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-10
     *10  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-10

  Binary Images:
         0x10eb4c000 -        0x10eb4efff  org.mozilla.thunderbird 52.7.0 (52.7.0) <0E0F85F8-FBC2-3DAC-96A2-446EC3F94DA1>  /Applications/Thunderbird.app/Contents/MacOS/thunderbird
         0x10f038000 -                ???  ???                                     <8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49>
         0x10f313000 -                ???  ???                                     <37C7EEA9-5286-3405-B0CC-78FD04B92F52>
      0x7fff8a61b000 -     0x7fff8aa91fff  com.apple.CoreFoundation 6.9 (1259.20)  <CFDE34FD-2227-3FD8-A8F9-00D21DCD872B>  /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
      0x7fff8fd57000 -     0x7fff9004cfff  com.apple.HIToolbox 2.1.1 (807.2)       <36413C45-36AF-34EF-9C0E-F18B31D1E565>  /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox
      0x7fff9240f000 -     0x7fff9243cfff  libdispatch.dylib (501.40.12)           <C7499857-61A5-3D7D-A5EA-65DCC8C3DF92>  /usr/lib/system/libdispatch.dylib
      0x7fff93b2b000 -     0x7fff93b34fff  libsystem_pthread.dylib (138.10.4)      <88FF5FCA-6275-3F82-BAF6-1B3ED639CC2A>  /usr/lib/system/libsystem_pthread.dylib
      0x7fff948f0000 -     0x7fff948fefff  com.apple.opengl 12.1.0 (12.1.0)        <E07DB6E4-1145-34C5-8A2E-54EB542708DA>  /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL
      0x7fff9496a000 -     0x7fff94988fff  libsystem_kernel.dylib (3248.73.5)      <4765807C-1B75-3D5F-9432-8F2755B45BE8>  /usr/lib/system/libsystem_kernel.dylib
      0x7fff964b9000 -     0x7fff970e2fff  com.apple.AppKit 6.9 (1404.47)          <F3411F6E-DD87-34D0-8C68-C69B2205E41D>  /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
      0x7fff972b4000 -     0x7fff972e8fff  com.apple.CoreVideo 1.8 (191.3)         <1AA24A1B-CB84-3F6B-B6DE-11494542649C>  /System/Library/Frameworks/CoreVideo.framework/Versions/A/CoreVideo
      0x7fff972e9000 -     0x7fff9763dfff  com.apple.Foundation 6.9 (1259.32)      <472CF0E0-E6AE-3330-86A5-849F120749E2>  /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
 *0xffffff7f80ef2000 - 0xffffff7f80efbfff  com.apple.kec.pthread 1.0 (1)           <39D0B4EB-B7F4-3891-96C2-F8B886656C8A>  /System/Library/Extensions/pthread.kext/Contents/MacOS/pthread
 *0xffffff8000200000 - 0xffffff80009fffff  kernel (3248.73.5)                      <5CF68DAF-4AFB-31DC-BAD0-31A0704046AA>  /System/Library/Kernels/kernel

Comment 26

[Glenn Reid]

Stack trace shows that hung on a mutex_lock when posting a notification while removing a view (most likely the Send progress window, which was still visible).  Seems unrelated to the various post-processing, filing, etc that follow sending a message, particularly since those all succeeded.

  10  -[NSView removeFromSuperview] + 471 (AppKit + 178579) [0x7fff964e4993]
  10  -[NSView _setWindow:] + 2494 (AppKit + 166823) [0x7fff964e1ba7]
  10  -[NSSurface setWindow:] + 66 (AppKit + 2510023) [0x7fff9671dcc7]
  10  -[NSSurface _disposeSurface] + 169 (AppKit + 2511470) [0x7fff9671e26e]
  10  -[NSNotificationCenter postNotificationName:object:userInfo:] + 66 (Foundation + 28506) [0x7fff972eff5a]
  10  _CFXNotificationPost + 693 (CoreFoundation + 378853) [0x7fff8a6777e5]

Comment 27

[Glenn Reid]

It just happened again, immediately after restarting the app.  Same exact mailbox and recipient (a reply), but this time the progress panel was no longer visible.

Very similar stack trace:

Date/Time:       2018-05-14 14:48:37 -0700
OS Version:      Mac OS X 10.11.6 (Build 15G19009)
Architecture:    x86_64
Report Version:  22

Command:         Thunderbird
Path:            /Applications/Thunderbird.app/Contents/MacOS/thunderbird
Version:         52.7.0 (52.7.0)
Parent:          launchd [1]
PID:             19647

Event:           hang
Duration:        1.10s (process was unresponsive for 49 seconds before sampling)
Steps:           11 (100ms sampling interval)

Hardware model:  MacPro6,1
Active cpus:     12

Fan speed:       790 rpm

--------------------------------------------------
Timeline format: stacks are sorted chronologically
Use -i and -heavy to re-report with count sorting
--------------------------------------------------

Heaviest stack for the main thread of the target process:
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 34933458) [0x11282bad2]
  11  -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454 (AppKit + 295462) [0x7fff96501226]
  11  _DPSNextEvent + 1067 (AppKit + 298486) [0x7fff96501df6]
  11  _BlockUntilNextEventMatchingListInModeWithFilter + 71 (HIToolbox + 198063) [0x7fff8fd875af]
  11  ReceiveNextEventCommon + 184 (HIToolbox + 198263) [0x7fff8fd87677]
  11  RunCurrentEventLoopInMode + 235 (HIToolbox + 198965) [0x7fff8fd87935]
  11  CFRunLoopRunSpecific + 296 (CoreFoundation + 560680) [0x7fff8a6a3e28]
  11  __CFRunLoopRun + 927 (CoreFoundation + 562223) [0x7fff8a6a442f]
  11  __CFRunLoopDoSources0 + 556 (CoreFoundation + 565004) [0x7fff8a6a4f0c]
  11  __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 (CoreFoundation + 698337) [0x7fff8a6c57e1]
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 34745617) [0x1127fdd11]
  11  -[NSView removeFromSuperview] + 471 (AppKit + 178579) [0x7fff964e4993]
  11  -[NSView _setWindow:] + 2494 (AppKit + 166823) [0x7fff964e1ba7]
  11  -[NSSurface setWindow:] + 66 (AppKit + 2510023) [0x7fff9671dcc7]
  11  -[NSSurface _disposeSurface] + 169 (AppKit + 2511470) [0x7fff9671e26e]
  11  -[NSNotificationCenter postNotificationName:object:userInfo:] + 66 (Foundation + 28506) [0x7fff972eff5a]
  11  _CFXNotificationPost + 693 (CoreFoundation + 378853) [0x7fff8a6777e5]
  11  -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1922 (CoreFoundation + 382354) [0x7fff8a678592]
  11  ___CFXNotificationPost_block_invoke + 50 (CoreFoundation + 657282) [0x7fff8a6bb782]
  11  _CFXRegistrationPost + 407 (CoreFoundation + 657943) [0x7fff8a6bba17]
  11  ___CFXRegistrationPost_block_invoke + 63 (CoreFoundation + 658079) [0x7fff8a6bba9f]
  11  __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12 (CoreFoundation + 658188) [0x7fff8a6bbb0c]
  11  CGLClearDrawable + 41 (OpenGL + 26502) [0x7fff948f6786]
  11  _pthread_mutex_lock_slow + 300 (libsystem_pthread.dylib + 5621) [0x7fff93b2c5f5]
  11  __psynch_mutexwait + 10 (libsystem_kernel.dylib + 93670) [0x7fff94980de6]
 *11  psynch_mtxcontinue + 0 (pthread + 25357) [0xffffff7f80ef830d]


Process:         thunderbird (Thunderbird) [19647]
Path:            /Applications/Thunderbird.app/Contents/MacOS/thunderbird
Architecture:    x86_64
Parent:          launchd [1]
UID:             501
Task size:       135572 pages
CPU Time:        0.004s
Note:            Unresponsive for 49 seconds before sampling
Note:            1 idle work queue threads omitted

  Thread 0x189eb2f        DispatchQueue 1         11 samples (1-11)       priority 47 (base 47)
  <process frontmost, thread QoS user interactive (requested user interactive), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 34933458) [0x11282bad2] 1-11
    11  -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454 (AppKit + 295462) [0x7fff96501226] 1-11
      11  _DPSNextEvent + 1067 (AppKit + 298486) [0x7fff96501df6] 1-11
        11  _BlockUntilNextEventMatchingListInModeWithFilter + 71 (HIToolbox + 198063) [0x7fff8fd875af] 1-11
          11  ReceiveNextEventCommon + 184 (HIToolbox + 198263) [0x7fff8fd87677] 1-11
            11  RunCurrentEventLoopInMode + 235 (HIToolbox + 198965) [0x7fff8fd87935] 1-11
              11  CFRunLoopRunSpecific + 296 (CoreFoundation + 560680) [0x7fff8a6a3e28] 1-11
                11  __CFRunLoopRun + 927 (CoreFoundation + 562223) [0x7fff8a6a442f] 1-11
                  11  __CFRunLoopDoSources0 + 556 (CoreFoundation + 565004) [0x7fff8a6a4f0c] 1-11
                    11  __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 (CoreFoundation + 698337) [0x7fff8a6c57e1] 1-11
                      11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 34745617) [0x1127fdd11] 1-11
                        11  -[NSView removeFromSuperview] + 471 (AppKit + 178579) [0x7fff964e4993] 1-11
                          11  -[NSView _setWindow:] + 2494 (AppKit + 166823) [0x7fff964e1ba7] 1-11
                            11  -[NSSurface setWindow:] + 66 (AppKit + 2510023) [0x7fff9671dcc7] 1-11
                              11  -[NSSurface _disposeSurface] + 169 (AppKit + 2511470) [0x7fff9671e26e] 1-11
                                11  -[NSNotificationCenter postNotificationName:object:userInfo:] + 66 (Foundation + 28506) [0x7fff972eff5a] 1-11
                                  11  _CFXNotificationPost + 693 (CoreFoundation + 378853) [0x7fff8a6777e5] 1-11
                                    11  -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1922 (CoreFoundation + 382354) [0x7fff8a678592] 1-11
                                      11  ___CFXNotificationPost_block_invoke + 50 (CoreFoundation + 657282) [0x7fff8a6bb782] 1-11
                                        11  _CFXRegistrationPost + 407 (CoreFoundation + 657943) [0x7fff8a6bba17] 1-11
                                          11  ___CFXRegistrationPost_block_invoke + 63 (CoreFoundation + 658079) [0x7fff8a6bba9f] 1-11
                                            11  __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12 (CoreFoundation + 658188) [0x7fff8a6bbb0c] 1-11
                                              11  CGLClearDrawable + 41 (OpenGL + 26502) [0x7fff948f6786] 1-11
                                                11  _pthread_mutex_lock_slow + 300 (libsystem_pthread.dylib + 5621) [0x7fff93b2c5f5] 1-11
                                                  11  __psynch_mutexwait + 10 (libsystem_kernel.dylib + 93670) [0x7fff94980de6] 1-11
                                                   *11  psynch_mtxcontinue + 0 (pthread + 25357) [0xffffff7f80ef830d] 1-11

  Thread 0x189eb57        DispatchQueue 2         11 samples (1-11)       priority 47 (base 47)
  <process frontmost, thread QoS user interactive (requested user interactive), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  _dispatch_mgr_thread + 52 (libdispatch.dylib + 32205) [0x7fff92416dcd] 1-11
    11  kevent_qos + 10 (libsystem_kernel.dylib + 98042) [0x7fff94981efa] 1-11
     *11  ??? (kernel + 5829920) [0xffffff800078f520] 1-11

  Thread 0x189eb5d        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  mach_msg_trap + 10 (libsystem_kernel.dylib + 69490) [0x7fff9497af72] 1-11
   *11  ipc_mqueue_receive_continue + 0 (kernel + 816784) [0xffffff80002c7690] 1-11

  Thread 0x189eb76        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  kevent + 10 (libsystem_kernel.dylib + 97994) [0x7fff94981eca] 1-11
   *11  ??? (kernel + 5829920) [0xffffff800078f520] 1-11

  Thread 0x189eb84        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __select + 10 (libsystem_kernel.dylib + 94330) [0x7fff9498107a] 1-11
   *11  ??? (kernel + 5991072) [0xffffff80007b6aa0] 1-11

  Thread 0x189eb8a        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb8b        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb8c        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb8d        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb8e        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb8f        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb90        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb91        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb92        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb93        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb94        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb95        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb96        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb97        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb98        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb99        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb9a        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 52903345) [0x11394edb1] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189eb9b        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  mach_msg_trap + 10 (libsystem_kernel.dylib + 69490) [0x7fff9497af72] 1-11
   *11  ipc_mqueue_receive_continue + 0 (kernel + 816784) [0xffffff80002c7690] 1-11

  Thread 0x189eba2        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
   *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec32        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec33        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794931) [0x1105b6373] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec37        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
   *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec38        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
   *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec3a        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
   *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec44        11 samples (1-11)       priority 47 (base 47)
  <process frontmost, thread QoS user interactive (requested legacy, override user interactive), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? [0x8000000000000000] 1-11
    11  ??? (<37C7EEA9-5286-3405-B0CC-78FD04B92F52> + 8326904) [0x110ecbef8] 1-11
      11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
       *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec46        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec47        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec48        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec49        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec4a        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec4b        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec4c        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec4d        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec4e        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec4f        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec50        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec51        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec65        11 samples (1-11)       priority 47 (base 47)   cpu time 0.001s
  <process frontmost, thread QoS user interactive (requested user interactive), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  thread_start + 13 (libsystem_pthread.dylib + 4945) [0x7fff93b2c351] 1-11
    11  _pthread_start + 168 (libsystem_pthread.dylib + 14618) [0x7fff93b2e91a] 1-11
      11  _pthread_body + 131 (libsystem_pthread.dylib + 14749) [0x7fff93b2e99d] 1-11
        11  _NSEventThread + 149 (AppKit + 1699221) [0x7fff96657d95] 1-11
          11  CFRunLoopRunSpecific + 296 (CoreFoundation + 560680) [0x7fff8a6a3e28] 1-11
            11  __CFRunLoopRun + 1356 (CoreFoundation + 562652) [0x7fff8a6a45dc] 1-11
              11  __CFRunLoopServiceMachPort + 212 (CoreFoundation + 565524) [0x7fff8a6a5114] 1-11
                11  mach_msg_trap + 10 (libsystem_kernel.dylib + 69490) [0x7fff9497af72] 1-11
                 *11  ipc_mqueue_receive_continue + 0 (kernel + 816784) [0xffffff80002c7690] 1-11

  Thread 0x189ec66        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec67        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec6a        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec6d        11 samples (1-11)       priority 31 (base 31)   cpu time 0.001s
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec6f        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
   *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ec73        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  mach_msg_trap + 10 (libsystem_kernel.dylib + 69490) [0x7fff9497af72] 1-11
   *11  ipc_mqueue_receive_continue + 0 (kernel + 816784) [0xffffff80002c7690] 1-11

  Thread 0x189ee42        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ee45        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
   *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ee48        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189ee49        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189efca        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189efcb        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189efde        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f1f3        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
   *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f1f4        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
   *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f2f0        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f43a        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f43b        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f44d        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f57a        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
   *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f674        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f6df        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x189f709        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x18a3fc0        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x18a4b12        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1796601) [0x1105b69f9] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x18a7fa2        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x18a87c6        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x18a88c6        11 samples (1-11)       priority 54 (base 54)   cpu time 0.001s
  <process frontmost, process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  thread_start + 13 (libsystem_pthread.dylib + 4945) [0x7fff93b2c351] 1-11
    11  _pthread_start + 168 (libsystem_pthread.dylib + 14618) [0x7fff93b2e91a] 1-11
      11  _pthread_body + 131 (libsystem_pthread.dylib + 14749) [0x7fff93b2e99d] 1-11
        11  startIOThread(void*) + 147 (CoreVideo + 31145) [0x7fff972bb9a9] 1-11
          11  CVDisplayLink::runIOThread() + 511 (CoreVideo + 32465) [0x7fff972bbed1] 1-11
            11  CVDisplayLink::waitUntil(unsigned long long) + 232 (CoreVideo + 32984) [0x7fff972bc0d8] 1-11
              11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
               *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x18a88c9        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794931) [0x1105b6373] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Thread 0x18a88cc        11 samples (1-11)       priority 31 (base 31)
  <process frontmost, thread QoS legacy (requested legacy), process unclamped, process received importance donation from WindowServer [187], IO policy important>
  11  ??? (<8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49> + 1794957) [0x1105b638d] 1-11
    11  __psynch_cvwait + 10 (libsystem_kernel.dylib + 93622) [0x7fff94980db6] 1-11
     *11  psynch_cvcontinue + 0 (pthread + 30218) [0xffffff7f80ef960a] 1-11

  Binary Images:
         0x10fed5000 -        0x10fed7fff  org.mozilla.thunderbird 52.7.0 (52.7.0) <0E0F85F8-FBC2-3DAC-96A2-446EC3F94DA1>  /Applications/Thunderbird.app/Contents/MacOS/thunderbird
         0x110400000 -                ???  ???                                     <8DFDD5ED-EAEC-3973-B831-1B1C6BB90E49>
         0x1106db000 -                ???  ???                                     <37C7EEA9-5286-3405-B0CC-78FD04B92F52>
      0x7fff8a61b000 -     0x7fff8aa91fff  com.apple.CoreFoundation 6.9 (1259.20)  <CFDE34FD-2227-3FD8-A8F9-00D21DCD872B>  /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
      0x7fff8fd57000 -     0x7fff9004cfff  com.apple.HIToolbox 2.1.1 (807.2)       <36413C45-36AF-34EF-9C0E-F18B31D1E565>  /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox
      0x7fff9240f000 -     0x7fff9243cfff  libdispatch.dylib (501.40.12)           <C7499857-61A5-3D7D-A5EA-65DCC8C3DF92>  /usr/lib/system/libdispatch.dylib
      0x7fff93b2b000 -     0x7fff93b34fff  libsystem_pthread.dylib (138.10.4)      <88FF5FCA-6275-3F82-BAF6-1B3ED639CC2A>  /usr/lib/system/libsystem_pthread.dylib
      0x7fff948f0000 -     0x7fff948fefff  com.apple.opengl 12.1.0 (12.1.0)        <E07DB6E4-1145-34C5-8A2E-54EB542708DA>  /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL
      0x7fff9496a000 -     0x7fff94988fff  libsystem_kernel.dylib (3248.73.5)      <4765807C-1B75-3D5F-9432-8F2755B45BE8>  /usr/lib/system/libsystem_kernel.dylib
      0x7fff964b9000 -     0x7fff970e2fff  com.apple.AppKit 6.9 (1404.47)          <F3411F6E-DD87-34D0-8C68-C69B2205E41D>  /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
      0x7fff972b4000 -     0x7fff972e8fff  com.apple.CoreVideo 1.8 (191.3)         <1AA24A1B-CB84-3F6B-B6DE-11494542649C>  /System/Library/Frameworks/CoreVideo.framework/Versions/A/CoreVideo
      0x7fff972e9000 -     0x7fff9763dfff  com.apple.Foundation 6.9 (1259.32)      <472CF0E0-E6AE-3330-86A5-849F120749E2>  /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
 *0xffffff7f80ef2000 - 0xffffff7f80efbfff  com.apple.kec.pthread 1.0 (1)           <39D0B4EB-B7F4-3891-96C2-F8B886656C8A>  /System/Library/Extensions/pthread.kext/Contents/MacOS/pthread
 *0xffffff8000200000 - 0xffffff80009fffff  kernel (3248.73.5)                      <5CF68DAF-4AFB-31DC-BAD0-31A0704046AA>  /System/Library/Kernels/kernel

Comment 28

[Glenn Reid]

Update.  I reproduced it twice more with the same scenario (same mailbox, same reply), but this time I turned off the [Place replies in the folder of the message being replied to] box in preferences.  Last three hangs the progress panel disappeared as expected, and then it hung.

Comment 29

[Glenn Reid]

Okay maybe we're getting somewhere.  I said that the copies were successful but that's not quite true.  The copy placed back in same folder always made it, but on looking more closely, it seems that the "Sent - Local Folders" copies are only arriving in that mailbox when it doesn't hang.  I turned off that option [Place a copy in: (*) Other: "Sent on Local Folders"] and will report back after more testing.  First try after that change didn't hang.

Comment 30

[Glenn Reid]

One last update and then I'll shut up for a while.  Had about 4 successful replies with that Copies thing turned off.  Can't quite call it a smoking gun yet, because I turned it back on and it also worked, but I will experiment both ways for a while since this has reproduced pretty highly (about 10 times today along) in this particular mailbox, so I will hammer on it and report back.

Comment 31

[Glenn Reid]

Not sure if this is a cause or a symptom but for some reason I have two "Sent - Local Folders" out boxes.  Screen shot here:

http://glenn.media/misc/sent_boxes.png

Note that I have 22 accounts set up, with a mix of IMAP and POP.  This bug occurs with several of the accounts, but has been hard to narrow down.  It seems to be pretty repeatable now with one of my mail accounts (see above 6 comments; it happened at least 10 times yesterday) and although it's not 100% repeatable, I have not seen the bug since turnng off <b>[Place a copy in: (*) Other: "Sent on Local Folders"]</b>.

It would be great to get this fixed.  I see it is still Unconfirmed after 8 months, but I would think that the stack traces alone would confirm that it's really a bug.  Somebody needs to look hard at the code around mutex_lock and filing in the Sent folder.  Not trivial code, but it's a pretty nasty bug.

Comment 32

[cinymini]

To add to the nasty nature of this error, for me, this error goes (nearly) away when I have “Place a copy in: Sent on Local Folders” turned ON. With the default setting, i. e. putting the sent email in the IMAP account’s Sent folder, sending nearly every other email ends up in a hang at times. Some days it will work smoothly, though.

I can confirm what Glenn described about the email being sent properly even when a hang occurs. When restarting Thunderbird, I see the mail in the Sent folder on the IMAP server.

Comment 33

[Glenn Reid]

This reproduced again today with 52.8.0 (Mac), this time on an IMAP mailbox, also with "Place a copy" checked, but the Sent folder is an IMAP folder in this case, not Local.

I would conclude it is neither IMAP nor POP specific, not local vs. IMAP folder specific.

Comment 34

[Wayne Mery (:wsmwk)]

Glenn,
Does it also happen with version 60?
https://www.thunderbird.net/en-US/channel/

Comment 36

[Wayne Mery (:wsmwk)]

(In reply to Wayne Mery (:wsmwk) from comment #34)
> Glenn,
> Does it also happen with version 60?
> https://www.thunderbird.net/en-US/channel/

Glenn wrote in August "It’s a lot less frequent than it was, although I’m not sure if I’ve just learned to work around it. It does still happen once a week or so, when it used to happen three or four times a day."

Comment 37

[avel9678]

This is still happening to me a least a couple of times a day and I'm using 68.4.1.

Comment 38

[avi bortnick]

Happens to me too at least a couple of times a day, with 68.4.1 on OS X 10.14.6.

Comment 39

[Sebastian]

Still happening here as well. Updated to 68.4.1 and it is happening multiple times a day, really frustrating. MacOS 10.14.6.

Comment 40

[aki]

I've been getting almost the exact same thing for some time now. Relatively infrequent, but clearly related to a send. Effectively it's telling me not to click around while a send is pending.

I'm using version 68.5.0 but it's been going on for a while going back at least a few updates.

My lldb-fu is not great, but here's some of it:

(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
  * frame #0: 0x00007fff6a2a44c2 libsystem_kernel.dylib`__psynch_mutexwait + 10
    frame #1: 0x00007fff6a36362a libsystem_pthread.dylib`_pthread_mutex_firstfit_lock_wait + 96
    frame #2: 0x00007fff6a3615e5 libsystem_pthread.dylib`_pthread_mutex_firstfit_lock_slow + 222
    frame #3: 0x00007fff3d2fdd05 OpenGL`CGLClearDrawable + 44
    frame #4: 0x00007fff32ab335f CoreFoundation`__CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
    frame #5: 0x00007fff32ab32f3 CoreFoundation`___CFXRegistrationPost1_block_invoke + 63
    frame #6: 0x00007fff32ab3268 CoreFoundation`_CFXRegistrationPost1 + 372
    frame #7: 0x00007fff32ab2ebe CoreFoundation`___CFXNotificationPost_block_invoke + 97
    frame #8: 0x00007fff32a827e2 CoreFoundation`-[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1575
    frame #9: 0x00007fff32a81c82 CoreFoundation`_CFXNotificationPost + 1351
    frame #10: 0x00007fff35107a22 Foundation`-[NSNotificationCenter postNotificationName:object:userInfo:] + 59
    frame #11: 0x00007fff2ffbe5f9 AppKit`-[NSSurface _disposeSurface] + 120
    frame #12: 0x00007fff2ffbe350 AppKit`-[NSSurface setWindow:] + 43
    frame #13: 0x00007fff2fc9b34d AppKit`-[NSView _setWindow:] + 2022
    frame #14: 0x00007fff2fc9e9ba AppKit`__21-[NSView _setWindow:]_block_invoke_2 + 304
    frame #15: 0x00007fff2fc9b469 AppKit`-[NSView _setWindow:] + 2306
    frame #16: 0x00007fff2fcd09b6 AppKit`-[NSView removeFromSuperview] + 158
    frame #17: 0x000000010c99aff1 XUL`___lldb_unnamed_symbol161780$$XUL + 17
    frame #18: 0x00007fff3519a8ab Foundation`__NSThreadPerformPerform + 254
    frame #19: 0x00007fff32abdb21 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    frame #20: 0x00007fff32abdac0 CoreFoundation`__CFRunLoopDoSource0 + 103
    frame #21: 0x00007fff32abd930 CoreFoundation`__CFRunLoopDoSources0 + 301
    frame #22: 0x00007fff32abc740 CoreFoundation`__CFRunLoopRun + 1272
    frame #23: 0x00007fff32abbbd3 CoreFoundation`CFRunLoopRunSpecific + 499
    frame #24: 0x00007fff3161165d HIToolbox`RunCurrentEventLoopInMode + 292
    frame #25: 0x00007fff3161139d HIToolbox`ReceiveNextEventCommon + 600
    frame #26: 0x00007fff31611127 HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 64
    frame #27: 0x00007fff2fc81ba4 AppKit`_DPSNextEvent + 990
    frame #28: 0x00007fff2fc80380 AppKit`-[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352
    frame #29: 0x000000010c9d7bc0 XUL`___lldb_unnamed_symbol162252$$XUL + 224
    frame #30: 0x00007fff2fc7209e AppKit`-[NSApplication run] + 658
    frame #31: 0x000000010c9d8d08 XUL`___lldb_unnamed_symbol162267$$XUL + 280
    frame #32: 0x000000010db83851 XUL`___lldb_unnamed_symbol211012$$XUL + 65
    frame #33: 0x000000010dc699cc XUL`___lldb_unnamed_symbol213883$$XUL + 2220
    frame #34: 0x000000010dc6a395 XUL`___lldb_unnamed_symbol213885$$XUL + 1429
    frame #35: 0x000000010dc6a8bd XUL`___lldb_unnamed_symbol213888$$XUL + 157
    frame #36: 0x0000000109a5adba thunderbird`___lldb_unnamed_symbol2$$thunderbird + 826
    frame #37: 0x00007fff6a1617fd libdyld.dylib`start + 1
    frame #38: 0x00007fff6a1617fd libdyld.dylib`start + 1

Looks almost identical to the report that started the thread.

Comment 41

[aki]

(In reply to aki from comment #40)

I've been getting almost the exact same thing for some time now. Relatively infrequent, but clearly related to a send. Effectively it's telling me not to click around while a send is pending.

I'm using version 68.5.0 but it's been going on for a while going back at least a few updates.

It happened again just now. Identical call stack.

Comment 42

[Tiziana.Ferrari]

I'd like to report the same problem and confirm the diagnosis on my MacOC Catalina 10.15.3 and Thunderbird version is 68.5.0 (64 bit).
The problem appears systematically every time I do a send and then start clicking on Thunderbird to perform different actions.

Any estimation of when the bug will be fixed? or of possible workarounds?

I have been using Thunderbird for my entire professional life, and I would hate to migrate to a different platform, but it is currently unusable.

Comment 43

[derek.tsai]

I have the same problem for the last few months. Please fix it ASAP. This is affecting my productivity.

Comment 44

[tdgunes]

I have the same problem as well. This happened two times today, whenever I press send. My setup is Mac OS X Catalina 10.15.4 and Thunderbird 68.6.0 (64-bit).

Comment 45

[bfoley]

I am noticing this a lot too (Mac OSX 10.15.4). Sending email is fine as long as I dont click on anything while it is sending. But if I click away (e.g. to the next message) while it is in the process of sending, it hangs almost every time.

Similar to this Bug 1508042

Comment 46

[bfoley]

I am on Thunderbird 68.8.1 (64-bit). So this is an ongoing issue. Also I did try turning off all my add ins and repairing folders with no luck.

Comment 47

[bfoley]

Doing some more reading for solutions - this seems to be working for me (set layers.acceleration.disabled to false) as described here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1381485#c349

Comment 48

[derek.tsai]

(In reply to bfoley from comment #47)

Doing some more reading for solutions - this seems to be working for me (set layers.acceleration.disabled to false) as described here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1381485#c349

Yes, turning on hardware acceleration does the trick. No more hang!

Comment 49

[aki]

(In reply to bfoley from comment #47)

Doing some more reading for solutions - this seems to be working for me (set layers.acceleration.disabled to false) as described here:
https://bugzilla.mozilla.org/show_bug.cgi?id=1381485#c349

The combination of set layers.acceleration.disabled to false and enabling hardware acceleration seems to have done it for me. The issue has not reoccurred since.