Crash in IPCError-browser | PDocAccessibleParent::RecvShowEvent invalid index

RESOLVED FIXED in Firefox 54



Disability Access APIs
10 months ago
9 months ago


(Reporter: mccr8, Assigned: tbsaunde)



Windows 8

Firefox Tracking Flags

(firefox52 unaffected, firefox53 disabled, firefox54 fixed)


(Whiteboard: aes+, crash signature)


(1 attachment)



10 months ago
This bug was filed from the Socorro interface and is 
report bp-64777aa1-390c-4210-a5ab-8556c2170127.

This looks like a new crash as of January 25. Same function as bug 1334058, but a different error message.

It looks like this is a result of bug 1332690 added more information to a failure.

Comment 1

10 months ago
Maybe you can make some use of this crash information, Trevor.
Flags: needinfo?(tbsaunde+mozbugs)


10 months ago
Whiteboard: aes+
Crash volume for signature 'IPCError-browser | PDocAccessibleParent::RecvShowEvent invalid index':
 - nightly (version 54): 530 crashes from 2017-01-23.
 - aurora  (version 53): 0 crashes from 2017-01-23.
 - beta    (version 52): 0 crashes from 2017-01-23.
 - release (version 51): 0 crashes from 2017-01-16.
 - esr     (version 45): 0 crashes from 2016-08-03.

Crash volume on the last weeks (Week N is from 01-30 to 02-05):
            W. N-1  W. N-2  W. N-3  W. N-4  W. N-5  W. N-6  W. N-7
 - nightly     324
 - aurora        0
 - beta          0
 - release       0       0
 - esr           0       0       0       0       0       0       0

Affected platform: Windows

Crash rank on the last 7 days:
           Browser   Content   Plugin
 - nightly           #5
 - aurora
 - beta
 - release
 - esr
status-firefox54: --- → affected

Comment 3

10 months ago
Created attachment 8832897 [details] [diff] [review]
ignore some invalid Show event messages

I'm not having much luck debugging this, so lets disable these checks for now and only crash when we hit a more serious problem, hopefully that'll make things more usable for people with touch screens till we disable a11y there.
Attachment #8832897 - Flags: review?(dbolter)
Attachment #8832897 - Flags: review?(dbolter) → review+

Comment 4

10 months ago
Pushed by
ignore some invalid Show event messages r=davidb

Comment 5

10 months ago
Last Resolved: 10 months ago
status-firefox54: affected → fixed
Resolution: --- → FIXED
Target Milestone: --- → mozilla54
If I understand correctly, this is just a mutation of an existing crash signature? Do we need to uplift this to Aurora then too?
Assignee: nobody → tbsaunde+mozbugs
status-firefox52: --- → unaffected
status-firefox53: --- → ?
status-firefox53: ? → affected
This crash signature only shows up in 54. Looks like bug 1332690 may be related but work there just landed and was backed out.

Comment 8

9 months ago
we should probably uplift the work around.  Its not great, but fixes some crashes.
Flags: needinfo?(tbsaunde+mozbugs)
Please request Aurora approval in that case.
Flags: needinfo?(tbsaunde+mozbugs)
e10s+a11y isn't riding past Aurora on 53.
status-firefox53: affected → disabled
Flags: needinfo?(tbsaunde+mozbugs)
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