Open Bug 1529794 Opened 3 years ago Updated 11 months ago

Crash in [@ local_unwind]


(Core :: Graphics: Text, defect, P3)

Windows 7




(Reporter: mccr8, Unassigned)



(Keywords: crash, steps-wanted, testcase-wanted)

Crash Data

This bug is for crash report bp-fdc65f74-77eb-4ff5-8306-0ad4c0190221.

Top 10 frames of crashing thread:

0 kernelbase.dll local_unwind 
1 kernelbase.dll SpecialMBToWC 
2 kernel32.dll WideCharToMultiByteStub 
3 dwrite.dll ConvertToAnsi 
4 dwrite.dll ReadCompatibleFullWidthGlyphBits 
5 dwrite.dll OpenTypeFontFaceBuilder::WriteCompatibleFullWidthGlyphBits 
6 dwrite.dll FontFaceRegionBuilder::IBuilder::WriteRegionInternal 
7 dwrite.dll FontFaceRegionBuilder::IBuilder::WriteRegion 
8 dwrite.dll FontFaceConstructionTask::AddElementData 
9 dwrite.dll CacheWriter::AddElement 

This isn't a high volume crash, but it is happening cross multiple branches, so I figured I'd file it. These are mostly "EXCEPTION_IN_PAGE_ERROR_READ / STATUS_IO_DEVICE_ERROR" crashes. I'm not sure what that means.

This looks like a variation on bug 1407741. That bug seems to indicate this may be an invalid font that has some pointer taking us off into invalid memory or a DWrite bug triggered by some valid font feature. However, as that bug concludes, without a reproducible testcase, this is hard to resolve.

Priority: -- → P3
See Also: → 1407741
QA Whiteboard: qa-not-actionable
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