Closed Bug 1309686 Opened 4 years ago Closed 3 years ago

Crash in mozilla::a11y::DocAccessible::UncacheChildrenInSubtree

Categories

(Core :: Disability Access APIs, defect)

52 Branch
Unspecified
Windows
defect
Not set
normal

Tracking

()

RESOLVED FIXED
Tracking Status
firefox49 --- wontfix
firefox-esr45 --- wontfix
firefox50 --- wontfix
firefox51 --- wontfix
firefox52 + wontfix
firefox-esr52 --- fixed
firefox53 + wontfix
firefox54 --- fixed
firefox55 --- fixed

People

(Reporter: esthermonchari, Unassigned)

References

(Blocks 1 open bug)

Details

(Keywords: crash, regression, regressionwindow-wanted)

Crash Data

This bug was filed from the Socorro interface and is 
report bp-4dd439a5-1064-416e-9efc-00fee2160928
=============================================================

Crash stated with build id 20160927030200 and is still continuing.

Adding ni on :Alexander and Ehsan since it appears they've worked in that area,  maybe they can help figure out if I placed this in the right component.
Flags: needinfo?(surkov.alexander)
Flags: needinfo?(ehsan)
This is the right component, thanks for the bug report.
Flags: needinfo?(ehsan)
is regression bug known?
Flags: needinfo?(surkov.alexander)
Adding some keywords to get some traction on finding the regression window.
Crash volume for signature 'mozilla::a11y::DocAccessible::UncacheChildrenInSubtree':
 - nightly (version 52): 29 crashes from 2016-09-19.
 - aurora  (version 51): 80 crashes from 2016-09-19.
 - beta    (version 50): 26 crashes from 2016-09-20.
 - release (version 49): 427 crashes from 2016-09-05.
 - esr     (version 45): 53 crashes from 2016-07-25.

Crash volume on the last weeks (Week N is from 10-17 to 10-23):
            W. N-1  W. N-2  W. N-3  W. N-4
 - nightly       7      13       6       2
 - aurora       28      29      14       2
 - beta          5       7       9       1
 - release     113     134     125      21
 - esr           1       1       0       3

Affected platform: Windows

Crash rank on the last 7 days:
           Browser   Content     Plugin
 - nightly #188      #256
 - aurora  #41
 - beta    #1436
 - release #515
 - esr     #5720
Marco have you ever hit this? Would be great to get STR.
Flags: needinfo?(mzehe)
(In reply to David Bolter [:davidb] from comment #5)
> Marco have you ever hit this? Would be great to get STR.
Unfortunately not! I would have either filed it myself if I had, or commented here with a link to my report and a description of the situation this occurred in. :(
Flags: needinfo?(mzehe)
we are a week away from RC, too late, this is now a wontfix for 50. Also, this is a very low volume crash on Beta50 cycle.
Hi David,
It seems to me that the crash starts to show from 51.0b6. Can you help find someone to look at this?
Flags: needinfo?(dbolter)
might have same reasons as bug 1321384 has

I'm curious, if bug 1316789 landing has any correlations with the crash ratio?
(In reply to alexander :surkov from comment #9)
> might have same reasons as bug 1321384 has
> 
> I'm curious, if bug 1316789 landing has any correlations with the crash
> ratio?

Yes I think it roughly doubled. Do you have a hypothesis?
Flags: needinfo?(dbolter) → needinfo?(surkov.alexander)
(In reply to David Bolter [:davidb] from comment #10)
> (In reply to alexander :surkov from comment #9)
> > might have same reasons as bug 1321384 has
> > 
> > I'm curious, if bug 1316789 landing has any correlations with the crash
> > ratio?
> 
> Yes I think it roughly doubled. Do you have a hypothesis?

I would expect it helping rather than aggravating it.

It's interesting the bug was presented in 45.5.1esr only and starting from 50.0.1 (no 46-49). Is there any chance that some changes backported from 50/51 to 45esr increased the crash ratio?

Also 51b/51 crash number increased comparing to 50, which should mean that 51b/51 got some destabializing extras.
Flags: needinfo?(surkov.alexander)
note, bug 1321384 also starts its story from  50.1.0. It'd be interesting to investigate the list of a11y changes made between 49 and 50 (presumably we've got a crash signature in 50) and between 50 and 51 (crash ratio had increased).
In regards to the tracking flags I see that the version is 52 but 51 is shown as affected. Can someone with history of this issue fix that? Thanks
(In reply to Justin [:JW_SoftvisionQA] from comment #13)
> In regards to the tracking flags I see that the version is 52 but 51 is
> shown as affected. Can someone with history of this issue fix that? Thanks

According to the crash stats signature, http://bit.ly/2jEnv3T, 51 is affected.
3232 crashes in the last 7 days on release - this is the #7 overall browser crash.
I'm getting certain that it has same roots as bug 1321384 has. Let's keep tracking of these two bugs in a bunch.
OK, thank.  if that works then we should see this signature drop off in beta 7 later this week.
This is still around in b7 and b8, no noticeable drop since previous betas afaict.
Not a huge volume and we're getting close to 52 RC → wontfix.
Wontfix for 53 as well. There are still some crashes on 52 and 53, none so far on 54/55.
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