[Tracking Requested - why for this release]: This startup crash has exploded to #2 in volume on 35.0b1. At this time, it appears to only affect Fx35. There were some scattered reports in the Aurora time frame. But as you can see, it has risen sharply in volume on beta1 2014110804 4 2014111300 1 2014111900 1 2014112500 1 2014112800 63 2014120116 2629 This bug was filed from the Socorro interface and is report bp-eb0b3277-c492-48d7-b78a-4904d2141203. ============================================================= Frame Module Signature Source 0 xul.dll gfxFontGroup::FamilyFace::SetFont(gfxFont*) gfx/thebes/gfxTextRun.h 1 xul.dll gfxFontGroup::GetFontAt(int) gfx/thebes/gfxTextRun.cpp 2 xul.dll gfxFontGroup::GetFirstValidFont() gfx/thebes/gfxTextRun.cpp 3 xul.dll gfxFontGroup::InitScriptRun<unsigned char>(gfxContext*, gfxTextRun*, unsigned char const*, unsigned int, unsigned int, int) gfx/thebes/gfxTextRun.cpp 4 xul.dll gfxFontGroup::InitTextRun<unsigned char>(gfxContext*, gfxTextRun*, unsigned char const*, unsigned int) gfx/thebes/gfxTextRun.cpp 5 xul.dll gfxFontGroup::MakeTextRun(unsigned char const*, unsigned int, gfxTextRunFactory::Parameters const*, unsigned int) gfx/thebes/gfxTextRun.cpp 6 xul.dll MakeTextRun<unsigned char>(unsigned char const*, unsigned int, gfxFontGroup*, gfxTextRunFactory::Parameters const*, unsigned int) layout/generic/nsTextFrame.cpp 7 xul.dll BuildTextRunsScanner::BuildTextRunForFrames(void*) layout/generic/nsTextFrame.cpp 8 xul.dll BuildTextRunsScanner::FlushFrames(bool, bool) layout/generic/nsTextFrame.cpp 9 xul.dll BuildTextRuns layout/generic/nsTextFrame.cpp
Milan - can you help us get some eyes on this?
Jonathan, something you can help with?
jdaggett has been working on this code more recently than me, I believe; I think we should ask him to take a look first.
This is a startup crash and it's been almost a week, meaning that it probably stranded a lot of beta users with non-working Firefox already. We are losing those people from our testing community! What's the status here, jdaggett?
FWIW, my SO's Firefox has this on about:crashes bp-4823bb7d-24f1-4ed8-b90d-abdfe2141215 15/12/2014 12:42 p.m. Report ID Date Submitted Let me know if there's anything worth collecting from an affected system.
We really need a testcase for this. If the crash is occurring close to startup then it must be caused by trying to create a gfxFont for a system font. But to hit this path the font must somehow be invalid, which is sort of puzzling.
Created attachment 8540507 [details] [diff] [review] patch, null-check the font before calling SetFont Add a simple null-check, which will cause this font to be simply marked as invalid and skipped.
FWIW 35 crashed like this when loading http://live.nicovideo.jp/watch/lv203465449 Report ID Date Submitted bp-18c157a4-5689-4945-9786-92ac62141223 23/12/2014 01:54 a.m.
Pushed to inbound https://hg.mozilla.org/integration/mozilla-inbound/rev/073b4ec79de9 Please leave this bug open as I'm not sure yet whether this will fix the problem or not.
Tryserver build including patch: https://firstname.lastname@example.org
(In reply to alex_mayorga from comment #8) > FWIW 35 crashed like this when loading > http://live.nicovideo.jp/watch/lv203465449 Alex, can you always reproduce this on your machine? If so, could you try with the tryserver build to see if the crash does not occur?
(In reply to John Daggett (:jtd) from comment #6) > We really need a testcase for this. If the crash is occurring close to > startup then it must be caused by trying to create a gfxFont for a system > font. But to hit this path the font must somehow be invalid, which is sort > of puzzling. I remember from the past that we every now and then had issues with some people having corrupted or damaged fonts installed in the system. It's wise to harden us against that when possible.
How can one tell if they have damaged/corrupted fonts?
User reports reproducible testcase: https://crash-stats.mozilla.com/report/index/42b309d6-caa6-4259-9d72-80d972141223 Reproducable crash (even with clean profile): Firefox ver >= 35 0. Windows Vista 64bit SP2 1. Download and install Google Noto Fonts named "Noto Sans CJK JP Regular". The file name is "NotoSansCJKjp-Regular.otf"(MD5: 96E4076155CD5D760B012360A850BFC0) from (URL removed) . 2. Open "(URL removed) 3. Select "Contents" tab. 4. Select "Default font" as "Noto Sans CJK JP" and apply it. 5. Crash... 6. You cannot start Firefox except for Firefox Safe Mode...
STR in Bug 1097626 Crash on Aurora36.0a2, Firefox35.0b6.
Please uplift this to Aurora36.0a2, Firefox35beta, ASAP.
Comment on attachment 8540507 [details] [diff] [review] patch, null-check the font before calling SetFont Approval Request Comment [Feature/regressing bug #]: Crash caused by changes made in bug 998869. [User impact if declined]: in situations where something is wrong with a font, a crash may occur. This occurs at startup so it has the potential to prevent users from using Firefox. [Describe test coverage new/current, TBPL]: don't have a reproducible testcase yet. [Risks and why]: the fix is a simple null-check so very minor risk. [String/UUID change made/needed]: none
No crashes in beta/aurora channel builds after patch landed on aurora/beta trees.
Socorro shows no crashes (with either of the two signatures) with Firefox 35 Beta 8 or older, Firefox 36 Aurora (builds after December 28), or Firefox 37 Nightly (Builds after December 24). Reproduced the crash in an older Firefox 35 Beta with steps from bug 1097626. Could not reproduce the crash with the same steps for Firefox 35 RC build2, latest Firefox 36 Aurora, or latest Firefox 37 Nightly.