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mochitests-2: intermittent "test_fallback.html | Exited with code 1 during test run" (ASSERTION: XPConnect is being called on a scope without a 'Components' property!)

VERIFIED FIXED in mozilla2.0b8

Status

()

Core
DOM
--
major
VERIFIED FIXED
6 years ago
4 years ago

People

(Reporter: jdm, Assigned: sgautherie)

Tracking

(Blocks: 1 bug, {assertion, intermittent-failure})

Trunk
mozilla2.0b8
assertion, intermittent-failure
Points:
---
Dependency tree / graph
Bug Flags:
in-testsuite +

Firefox Tracking Flags

(status1.9.2 .14-fixed, status1.9.1 .17-fixed)

Details

(Whiteboard: [test which aborts the suite] , URL)

Attachments

(3 attachments)

(Reporter)

Description

6 years ago
http://tinderbox.mozilla.org/showlog.cgi?log=Firefox/1291226867.1291227768.14402.gz&fulltext=1#err1
Rev3 Fedora 12 mozilla-central debug test mochitests-2/5 on 2010/12/01 10:07:47

s: talos-r3-fed-025
TEST-UNEXPECTED-FAIL | /tests/dom/tests/mochitest/ajax/offline/test_fallback.html | Exited with code 1 during test run
PROCESS-CRASH | /tests/dom/tests/mochitest/ajax/offline/test_fallback.html | application crashed (minidump found)
Thread 0 (crashed)
TEST-UNEXPECTED-FAIL | automationutils.processLeakLog() | missing output line for total leaks!

###!!! ASSERTION: XPConnect is being called on a scope without a 'Components' property!: 'Error', file ../../../../../js/src/xpconnect/src/xpcwrappednativescope.cpp, line 779
DEBUG_CheckForComponentsInScope [xpcwrappednativescope.cpp:780]
XPCWrappedNativeScope::FindInJSObjectScope [xpcwrappednativescope.cpp:838]
XPCWrappedNativeScope::FindInJSObjectScope [xpcprivate.h:1541]
GetContextFromObject [xpcwrappedjsclass.cpp:563]
nsXPCWrappedJSClass::CallMethod [xpcwrappedjsclass.cpp:1287]
nsXPCWrappedJS::CallMethod [xpcwrappedjs.cpp:588]
PrepareAndDispatch [xptcstubs_gcc_x86_unix.cpp:95]
nsThread::ProcessNextEvent [nsThread.cpp:626]
NS_ProcessNextEvent_P [nsThreadUtils.cpp:250]
mozilla::ipc::MessagePump::Run [MessagePump.cpp:110]
MessageLoop::RunInternal [message_loop.cc:220]
MessageLoop::RunHandler [message_loop.cc:203]
MessageLoop::Run [message_loop.cc:176]
nsBaseAppShell::Run [nsBaseAppShell.cpp:198]
nsAppStartup::Run [nsAppStartup.cpp:191]
XRE_main [nsAppRunner.cpp:3691]
main [nsBrowserApp.cpp:158]
libc.so.6 + 0x16bb6
Assertion failure: obj->containsSlot(slot), at ../../../js/src/jsinterp.cpp:5315
NEXT ERROR TEST-UNEXPECTED-FAIL | /tests/dom/tests/mochitest/ajax/offline/test_fallback.html | Exited with code 1 during test run
INFO | automation.py | Application ran for: 0:09:57.954633
INFO | automation.py | Reading PID log: /tmp/tmpyPxkAJpidlog
PROCESS-CRASH | /tests/dom/tests/mochitest/ajax/offline/test_fallback.html | application crashed (minidump found)
Operating system: Linux
                  0.0.0 Linux 2.6.31.5-127.fc12.i686.PAE #1 SMP Sat Nov 7 21:25:57 EST 2009 i686
CPU: x86
     GenuineIntel family 6 model 23 stepping 10
     2 CPUs

Crash reason:  SIGABRT
Crash address: 0x7af

Thread 0 (crashed)
 0  linux-gate.so + 0x424
    eip = 0x0048e424   esp = 0xbfafbb10   ebp = 0xbfafbb28   ebx = 0x000007af
    esi = 0x00000000   edi = 0x00c7cff4   eax = 0x00000000   ecx = 0x000007af
    edx = 0x00000006   efl = 0x00200206
    Found by: given as instruction pointer in context
 1  libxul.so!JS_Assert [jsutil.cpp : 83 + 0xb]
    eip = 0x02a581f3   esp = 0xbfafbb30   ebp = 0xbfafbb48
    Found by: previous frame's frame pointer
 2  libxul.so!js::Interpret [jsinterp.cpp : 5315 + 0x3e]
    eip = 0x02bbeac7   esp = 0xbfafbb50   ebp = 0xbfafca38   ebx = 0x03467194
    Found by: call frame info
 3  libxul.so!js::RunScript [jsinterp.cpp : 657 + 0x21]
    eip = 0x0299ca68   esp = 0xbfafca40   ebp = 0xbfafca68   ebx = 0x03467194
    esi = 0x00000000   edi = 0xbfafcda0
    Found by: call frame info
 4  libxul.so!js::Invoke [jsinterp.cpp : 737 + 0x18]
    eip = 0x0299d758   esp = 0xbfafca70   ebp = 0xbfafcad8   ebx = 0x03467194
    esi = 0x00000000   edi = 0xbfafcda0
    Found by: call frame info
 5  libxul.so!js::ExternalInvoke [jsinterp.cpp : 858 + 0x19]
    eip = 0x0299e04d   esp = 0xbfafcae0   ebp = 0xbfafcb28   ebx = 0x03467194
    esi = 0x00000000   edi = 0xbfafcda0
    Found by: call frame info
 6  libxul.so!js::ExternalInvoke [jsinterp.h : 962 + 0x38]
    eip = 0x028f2948   esp = 0xbfafcb30   ebp = 0xbfafcb68   ebx = 0x03467194
    esi = 0xbfafce18   edi = 0xbfafcda0
    Found by: call frame info
 7  libxul.so!JS_CallFunctionValue [jsapi.cpp : 4973 + 0x3c]
    eip = 0x028f2aa8   esp = 0xbfafcb70   ebp = 0xbfafcbb8   ebx = 0x03467194
    esi = 0xbfafce18   edi = 0xbfafcda0
    Found by: call frame info
 8  libxul.so!nsXPCWrappedJSClass::CallMethod [xpcwrappedjsclass.cpp : 1694 + 0x4a]
    eip = 0x01ebf882   esp = 0xbfafcbc0   ebp = 0xbfafd048   ebx = 0x03467194
    esi = 0xb36fe020   edi = 0x01b279fe
    Found by: call frame info
 9  libxul.so!nsXPCWrappedJS::CallMethod [xpcwrappedjs.cpp : 588 + 0x35]
    eip = 0x01eb623b   esp = 0xbfafd050   ebp = 0xbfafd098   ebx = 0x03467194
    esi = 0x01ebe37e   edi = 0x01eb60d2
    Found by: call frame info
10  libxul.so!PrepareAndDispatch [xptcstubs_gcc_x86_unix.cpp : 95 + 0x3a]
    eip = 0x02729b1c   esp = 0xbfafd0a0   ebp = 0xbfafd198   ebx = 0x03467194
    esi = 0x00000003   edi = 0x01eb60d2
    Found by: call frame info
11  libxul.so!nsThread::ProcessNextEvent [nsThread.cpp : 626 + 0x18]
    eip = 0x02708f0a   esp = 0xbfafd1a0   ebp = 0xbfafd238   ebx = 0x03467194
    esi = 0x0945d414   edi = 0x02441ca2
    Found by: call frame info
12  libxul.so!NS_ProcessNextEvent_P [nsThreadUtils.cpp : 250 + 0x1f]
    eip = 0x02690690   esp = 0xbfafd240   ebp = 0xbfafd278   ebx = 0x03467194
    esi = 0x00000001   edi = 0x02441ca2
    Found by: call frame info
13  libxul.so!mozilla::ipc::MessagePump::Run [MessagePump.cpp : 110 + 0x15]
    eip = 0x024d98dc   esp = 0xbfafd280   ebp = 0xbfafd2c8   ebx = 0x03467194
    esi = 0x00000001   edi = 0x02441ca2
    Found by: call frame info
14  libxul.so!MessageLoop::RunInternal [message_loop.cc : 219 + 0x22]
    eip = 0x02774b9f   esp = 0xbfafd2d0   ebp = 0xbfafd2f8   ebx = 0x03467194
    esi = 0x09bef080   edi = 0x02441ca2
    Found by: call frame info
15  libxul.so!MessageLoop::RunHandler [message_loop.cc : 202 + 0xa]
    eip = 0x02774bb7   esp = 0xbfafd300   ebp = 0xbfafd308   ebx = 0x03467194
    esi = 0x09bef080   edi = 0x02441ca2
    Found by: call frame info
16  libxul.so!MessageLoop::Run [message_loop.cc : 176 + 0xa]
    eip = 0x02774c1b   esp = 0xbfafd310   ebp = 0xbfafd328   ebx = 0x03467194
    esi = 0x09bef080   edi = 0x02441ca2
    Found by: call frame info
17  libxul.so!nsBaseAppShell::Run [nsBaseAppShell.cpp : 192 + 0xc]
    eip = 0x02369a1e   esp = 0xbfafd330   ebp = 0xbfafd368   ebx = 0x03467194
    esi = 0x09bef080   edi = 0x02441ca2
    Found by: call frame info
18  libxul.so!nsAppStartup::Run [nsAppStartup.cpp : 191 + 0x1b]
    eip = 0x0209c069   esp = 0xbfafd370   ebp = 0xbfafd3a8   ebx = 0x03467194
    esi = 0x09bef080   edi = 0x02441ca2
    Found by: call frame info
19  libxul.so!XRE_main [nsAppRunner.cpp : 3691 + 0x1b]
    eip = 0x00fab497   esp = 0xbfafd3b0   ebp = 0xbfafd948   ebx = 0x03467194
    esi = 0x09bef080   edi = 0x02441ca2
    Found by: call frame info
20  firefox-bin!main [nsBrowserApp.cpp : 158 + 0x1d]
    eip = 0x08048e42   esp = 0xbfafd950   ebp = 0xbfafd9b8   ebx = 0x0804bacc
    esi = 0x093f20f0   edi = 0x026f36fc
    Found by: call frame info
21  libc-2.11.so + 0x16bb5
    eip = 0x00afebb6   esp = 0xbfafd9d0   ebp = 0xbfafda48   ebx = 0x00c58ff4
    esi = 0x00000000   edi = 0x00000000
    Found by: call frame info
22  firefox-bin + 0x9f0
    eip = 0x080489f1   esp = 0xbfafda50   ebp = 0x00000000
    Found by: previous frame's frame pointer
23  firefox-bin!Output [nsBrowserApp.cpp : 77 + 0x5]
    eip = 0x08048b42   esp = 0xbfafda54   ebp = 0x00000000
    Found by: stack scanning
24  ld-2.11.so + 0xecef
    eip = 0x00ad4cf0   esp = 0xbfafda68   ebp = 0x00000000
    Found by: stack scanning
Comment hidden (Treeherder Robot)
Comment hidden (Treeherder Robot)
Comment hidden (Treeherder Robot)
(Assignee)

Comment 4

6 years ago
This started in the changeset after the one for bug 615546.
Blocks: 615546
OS: Mac OS X → All
Version: unspecified → Trunk
(Assignee)

Updated

6 years ago
Summary: Intermittent assertion in test_fallback.html | Exited with code 1 during test run (ASSERTION: XPConnect is being called on a scope without a 'Components' property!) → mochitests-2: intermittent "test_fallback.html | Exited with code 1 during test run" (ASSERTION: XPConnect is being called on a scope without a 'Components' property!)
Comment hidden (Treeherder Robot)
Comment hidden (Treeherder Robot)
Comment hidden (Treeherder Robot)
(Assignee)

Comment 8

6 years ago
The previous build:
http://tinderbox.mozilla.org/showlog.cgi?log=Firefox/1291223602.1291226192.7754.gz&fulltext=1
Rev3 Fedora 12 mozilla-central debug test mochitests-2/5 on 2010/12/01 09:13:22
{
5081 INFO TEST-PASS | /tests/dom/tests/mochitest/ajax/offline/test_fallback.html | http://mochi.test:8888/tests/dom/tests/mochitest/ajax/offline/namespace2/non-existing.html should not exist in the offline cache
5082 INFO TEST-END | /tests/dom/tests/mochitest/ajax/offline/test_fallback.html | finished in 6794ms
}

*****

The first build, which was green:
http://tinderbox.mozilla.org/showlog.cgi?log=Firefox/1291224891.1291227563.13488.gz&fulltext=1
Rev3 Fedora 12 mozilla-central debug test mochitests-2/5 on 2010/12/01 09:34:51
{
...
5083 INFO TEST-PASS | /tests/dom/tests/mochitest/ajax/offline/test_fallback.html | http://mochi.test:8888/tests/dom/tests/mochitest/ajax/offline/namespace2/non-existing.html should not exist in the offline cache
###!!! ASSERTION: XPConnect is being called on a scope without a 'Components' property!: 'Error', file ../../../../../js/src/xpconnect/src/xpcwrappednativescope.cpp, line 779
...
JavaScript error: http://mochi.test:8888/tests/SimpleTest/SimpleTest.js, line 555: SimpleTest is undefined
5084 INFO TEST-END | /tests/dom/tests/mochitest/ajax/offline/test_fallback.html | finished in 6033ms
}
Same "XPConnect" assertion,
but "JavaScript error" instead of "Assertion failure: obj->containsSlot(slot)".

Code was:
{
549SimpleTest._finishNow = function () {
550 if (parentRunner) {
551 // The test is running in an iframe, and its parent has a TestRunner.
552 parentRunner.testFinished(SimpleTest._tests);
553 } else {
554 // The test is running alone in the window.
555 SimpleTest.showReport();
556 }
557};
}

***

Test code is:

http://mxr.mozilla.org/mozilla-central/source/dom/tests/mochitest/ajax/offline/test_fallback.html?force=1
107 function finalize()
114   OfflineTest.checkCache("http://mochi.test:8888/tests/dom/tests/mochitest/ajax/offline/namespace2/non-existing.html", false);
115 
116   OfflineTest.teardown();
117   OfflineTest.finish();

http://mxr.mozilla.org/mozilla-central/source/dom/tests/mochitest/ajax/offline/offlineTests.js
145 finish: function()
146 {
147   SimpleTest.finish();
148 
149   if (this._masterWindow) {
150     this._masterWindow.OfflineTest.finish();
151     window.close();
152   }
153 },

"I" will have to check how this finish() code is supposed to work exactly...
Hints welcomed!
Severity: normal → major
Depends on: 402272
Keywords: assertion
Whiteboard: [orange] → [test which aborts the suite] [orange]
(Assignee)

Comment 9

6 years ago
Created attachment 494690 [details] [diff] [review]
(Av1) offlineTests.js: Fix finish(), Remove unused _slaveWindow._OfflineSlaveWindow, Merge _isMaster, _slaveWindow and hasSlave() into new _hasSlave
[Checked in: Comment 13 & 26 & 28]

Fixes the 'JavaScript error' on my local Windows 2000.
Assignee: nobody → sgautherie.bz
Status: NEW → ASSIGNED
Attachment #494690 - Flags: review?(jst)
(Assignee)

Updated

6 years ago
Blocks: 402272
Component: DOM: Core & HTML → DOM: Mozilla Extensions
No longer depends on: 402272
Hardware: x86 → All
Target Milestone: --- → mozilla2.0b8
I can steal the review here.

What is exactly cause of the assertion failure?  Is it because _slaveWindow is pointing to something non-existing?
(Assignee)

Comment 11

6 years ago
(In reply to comment #10)
> What is exactly cause of the assertion failure?

The issue(s) is that SimpleTest.finish() gets called
1) twice (first from slave window then from master window)
2) synchronously (when test has obviously not fully ended yet)

NB: I'm not adding another executeSoon, as bug 615546 will do that automatically.
Comment on attachment 494690 [details] [diff] [review]
(Av1) offlineTests.js: Fix finish(), Remove unused _slaveWindow._OfflineSlaveWindow, Merge _isMaster, _slaveWindow and hasSlave() into new _hasSlave
[Checked in: Comment 13 & 26 & 28]

Yes, that's what I found out during the review as well.  Good fix.

r=honzab
Attachment #494690 - Flags: review?(jst) → review+
(Assignee)

Comment 13

6 years ago
Comment on attachment 494690 [details] [diff] [review]
(Av1) offlineTests.js: Fix finish(), Remove unused _slaveWindow._OfflineSlaveWindow, Merge _isMaster, _slaveWindow and hasSlave() into new _hasSlave
[Checked in: Comment 13 & 26 & 28]

http://hg.mozilla.org/mozilla-central/rev/2357fce3dceb
Attachment #494690 - Attachment description: (Av1) offlineTests.js: Fix finish(), Remove unused _slaveWindow._OfflineSlaveWindow, Merge _isMaster, _slaveWindow and hasSlave() into new _hasSlave → (Av1) offlineTests.js: Fix finish(), Remove unused _slaveWindow._OfflineSlaveWindow, Merge _isMaster, _slaveWindow and hasSlave() into new _hasSlave [Checked in: Comment 13]
(Assignee)

Updated

6 years ago
Status: ASSIGNED → RESOLVED
Last Resolved: 6 years ago
Flags: in-testsuite+
Resolution: --- → FIXED
(Assignee)

Comment 14

6 years ago
Hum, the 'offline' tests are still passing, but we get this assertion after each of them now :-/
I need to compile a debug build to check that...
Status: RESOLVED → REOPENED
Resolution: FIXED → ---
(Assignee)

Comment 15

6 years ago
Created attachment 495220 [details] [diff] [review]
(Bv1) offlineTests.js: Fully fix finish(), 1 s/dump(/ok(false,/, Fix some nits
[Checked in: Comment 21 & 26 & 28]

I had thought about that |this._masterWindow.| then I forgot about it as I was testing with an opt build :-/
Attachment #495220 - Flags: review?(honzab.moz)
(Assignee)

Comment 16

6 years ago
Created attachment 495221 [details] [diff] [review]
(Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits
[Checked in: See comment 24+27 & 26 & 28]
Attachment #495221 - Flags: review?(honzab.moz)
(Assignee)

Comment 17

6 years ago
NB: These 'offline' tests report some errors in the Error Console and trigger 3 other assertions ... but all those are unrelated to this bug, so I won't care atm.
Depends on: 443017
(Assignee)

Comment 18

6 years ago
Ftr, both Bv1 and Cv1 patches passed on Try: see bug 615546 comment 10.
Comment on attachment 495220 [details] [diff] [review]
(Bv1) offlineTests.js: Fully fix finish(), 1 s/dump(/ok(false,/, Fix some nits
[Checked in: Comment 21 & 26 & 28]

r=honzab
Attachment #495220 - Flags: review?(honzab.moz) → review+
Comment on attachment 495221 [details] [diff] [review]
(Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits
[Checked in: See comment 24+27 & 26 & 28]

>-  if (gStep == 105) {
>+  if (gStep++ == 105)
>     finalize();
>-  }
>-
>-  ++gStep;

You are just simplifying or want to have gStep increased before call to finalize()?  If the former, I would rather leave the previous form.  ++ in the condition could be overlooked.  Up to you.

r=honzab.
Attachment #495221 - Flags: review?(honzab.moz) → review+
(Assignee)

Comment 21

6 years ago
Comment on attachment 495220 [details] [diff] [review]
(Bv1) offlineTests.js: Fully fix finish(), 1 s/dump(/ok(false,/, Fix some nits
[Checked in: Comment 21 & 26 & 28]

http://hg.mozilla.org/mozilla-central/rev/6d18466cf3e6
Attachment #495220 - Attachment description: (Bv1) offlineTests.js: Fully fix finish(), 1 s/dump(/ok(false,/, Fix some nits → (Bv1) offlineTests.js: Fully fix finish(), 1 s/dump(/ok(false,/, Fix some nits [Checked in: Comment 21]
(Assignee)

Comment 22

6 years ago
(In reply to comment #20)
> Comment on attachment 495221 [details] [diff] [review]
> (Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits
> 
> >-  if (gStep == 105) {
> >+  if (gStep++ == 105)
> >     finalize();
> >-  }
> >-
> >-  ++gStep;
> 
> You are just simplifying or want to have gStep increased before call to
> finalize()?  If the former, I would rather leave the previous form.  ++ in the
> condition could be overlooked.  Up to you.

Though it's just a nit atm, my main goal is to have nothing executing after finalize().
Having the last/extra gStep increase before the call is just some kind of bonus.
I'm fine with leaving the increase as is but adding a |return;| after finalize() instead, if you prefer.
(In reply to comment #22)
> I'm fine with leaving the increase as is but adding a |return;| after
> finalize() instead, if you prefer.

Agree.
(Assignee)

Comment 24

6 years ago
Comment on attachment 495221 [details] [diff] [review]
(Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits
[Checked in: See comment 24+27 & 26 & 28]

http://hg.mozilla.org/mozilla-central/rev/25a128ff3cbf
Attachment #495221 - Attachment description: (Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits → (Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits [Checked in: See comment 24]
(Assignee)

Comment 25

6 years ago
V.Fixed, per
http://tinderbox.mozilla.org/showlog.cgi?log=Firefox/1291771001.1291773143.27597.gz&fulltext=1
WINNT 5.2 mozilla-central debug test mochitests-2/5 on 2010/12/07 17:16:41
and
http://tinderbox.mozilla.org/showlog.cgi?log=Firefox/1291774138.1291776469.9513.gz&fulltext=1
WINNT 5.2 mozilla-central debug test mochitests-2/5 on 2010/12/07 18:08:58
Status: REOPENED → RESOLVED
Last Resolved: 6 years ago6 years ago
Resolution: --- → FIXED
(Assignee)

Comment 26

6 years ago
http://hg.mozilla.org/releases/mozilla-1.9.2/rev/f1ebb30ba752
Status: RESOLVED → VERIFIED
status1.9.2: --- → .14-fixed
(Assignee)

Comment 27

6 years ago
Comment on attachment 495221 [details] [diff] [review]
(Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits
[Checked in: See comment 24+27 & 26 & 28]

(In reply to comment #24)
> http://hg.mozilla.org/mozilla-central/rev/25a128ff3cbf

Cv1, with comment 23 suggestion(s).
Attachment #495221 - Attachment description: (Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits [Checked in: See comment 24] → (Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits [Checked in: See comment 24+27]
(Assignee)

Comment 28

6 years ago
(In reply to comment #26)
> http://hg.mozilla.org/releases/mozilla-1.9.2/rev/f1ebb30ba752

http://hg.mozilla.org/releases/mozilla-1.9.1/rev/ec5602f129b5
without the s/dump/ok/ change, as this block was not landed there.
status1.9.1: --- → .17-fixed
And thanks for fixing this, Serge.
(Assignee)

Updated

6 years ago
Attachment #494690 - Attachment description: (Av1) offlineTests.js: Fix finish(), Remove unused _slaveWindow._OfflineSlaveWindow, Merge _isMaster, _slaveWindow and hasSlave() into new _hasSlave [Checked in: Comment 13] → (Av1) offlineTests.js: Fix finish(), Remove unused _slaveWindow._OfflineSlaveWindow, Merge _isMaster, _slaveWindow and hasSlave() into new _hasSlave [Checked in: Comment 13 & 26 & 28]
(Assignee)

Updated

6 years ago
Attachment #495220 - Attachment description: (Bv1) offlineTests.js: Fully fix finish(), 1 s/dump(/ok(false,/, Fix some nits [Checked in: Comment 21] → (Bv1) offlineTests.js: Fully fix finish(), 1 s/dump(/ok(false,/, Fix some nits [Checked in: Comment 21 & 26 & 28]
(Assignee)

Updated

6 years ago
Attachment #495221 - Attachment description: (Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits [Checked in: See comment 24+27] → (Cv1) test_fallback.html: Remove unused gManifestUpdated, Fix some nits [Checked in: See comment 24+27 & 26 & 28]
Keywords: intermittent-failure
Whiteboard: [test which aborts the suite] [orange] → [test which aborts the suite]
Component: DOM: Mozilla Extensions → DOM
Product: Core → Core
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