[Affected versions]: - 53.0a2 (id: 20170215004022) [Affected platforms]: - Windows 10 x64 & Windows 7 x86 [Steps to reproduce]: 1. Check about:config if the pref "layers.gpu-process.enabled" is set to "true" 2. Check the Windows task manager for 3 Firefox processes (some of them may be registered as a background process) 3. Add the "layers.gpu-process.max_restarts" integer preference in about:config and set it to 3. 4. Restart Firefox. 5. Go to any of the following links and press "Switch to presentation mode" https://people.eecs.berkeley.edu/~istoica/papers/2003/cacm03.pdf http://www.pdf995.com/samples/pdf.pdf https://www.irs.gov/pub/irs-pdf/fw4.pdf https://www.nasa.gov/pdf/703154main_earth_art-ebook.pdf 6. Go to "about:support" in a different window and find the "Terminate GPU Process" button in the "Graphics" section, press it and make sure there are only 2 processes left in Task Manager. (1 in Apps & 1 in Background Processes). [Expected result]: - There are no issues with the document or Firefox itself. [Actual result]: - The tab crashes. [Regression range]: - Not a regression. New feature. [Additional notes]: - One of the crash reports: https://crash-stats.mozilla.com/report/index/955a0a6b-ca63-44de-9417-b86252170215
David, is this a "crash path" that we should catch?
Priority: -- → P3
Assignee: nobody → dvander
Status: NEW → ASSIGNED
Attachment #8837885 - Flags: review?(matt.woodrow) → review+
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/integration/mozilla-inbound/rev/0bce3085f669 Fix a content canvas crash caused by losing IPC during a GPU process restart. (bug 1339852, r=mattwoodrow)
Comment on attachment 8837885 [details] [diff] [review] fix Approval Request Comment [Feature/Bug causing the regression]: New to 53, compositor process. [User impact if declined]: Avoidable crashes in the new feature. [Is this code covered by automated tests?]: No [Has the fix been verified in Nightly?]: [Needs manual test from QE? If yes, steps to reproduce]: [List of other uplifts needed for the feature/fix]: [Is the change risky?]: Low risk. [Why is the change risky/not risky?]: Null pointer check equivalent. [String changes made/needed]:
Attachment #8837885 - Flags: approval-mozilla-aurora?
Comment on attachment 8837885 [details] [diff] [review] fix New crash in 53, let's take it on aurora before the merge.
Attachment #8837885 - Flags: approval-mozilla-aurora? → approval-mozilla-aurora+
I reproduced this issue using Fx 54.0a1(build ID:20170215030342), on Windows 10 x64. I can confirm this issue is fixed, I verified Fx 54.0a1, build ID: 20170305030210 and Fx53.0a2, build ID: 20170306004003 on Windows 10 x64. Cheers!
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