Bug 153921

Summary: [GTK][Mac] WebCore::FontCache::lastResortFallbackFont WebKitWebProcess Segfault
Product: WebKit Reporter: Ethan Sherriff <ethansherriff>
Component: WebKitGTKAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: bugs-noreply, jeremyhu, mcatanzaro
Priority: P2    
Version: WebKit Local Build   
Hardware: Mac   
OS: OS X 10.11   
Bug Depends on:    
Bug Blocks: 126492, 153093    
Attachments:
Description Flags
Crash report for WebKitWebProcess none

Ethan Sherriff
Reported 2016-02-05 10:36:20 PST
Created attachment 270753 [details] Crash report for WebKitWebProcess Running MiniBrowser on a source build of WebKitGTK+ 2.10.7 on OS X 10.11 causes WebKitWebProcess to crash.
Attachments
Crash report for WebKitWebProcess (60.49 KB, text/plain)
2016-02-05 10:36 PST, Ethan Sherriff 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Jeremy Huddleston Sequoia
Comment 1 2016-02-05 12:20:23 PST
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 libwebkit2gtk-4.0.37.dylib 0x0000000107eea634 WebCore::FontCache::lastResortFallbackFont(WebCore::FontDescription const&) + 148 1 libwebkit2gtk-4.0.37.dylib 0x0000000107590824 WebCore::CSSFontFaceSource::font(WebCore::FontDescription const&, bool, bool, WebCore::CSSFontSelector*) + 596 2 libwebkit2gtk-4.0.37.dylib 0x000000010758f6bf WebCore::CSSFontFace::font(WebCore::FontDescription const&, bool, bool) + 255 Can you disassemble WebCore::FontCache::lastResortFallbackFont, so we can see what is going on at that point?
Ethan Sherriff
Comment 2 2016-02-05 12:31:21 PST
Sure, I'm quite new to this sort of stuff, how would I go about doing that?
Ethan Sherriff
Comment 3 2016-02-06 13:52:41 PST
Could this be related to bug 141432, it seems similar but it's pretty a ancient bug.
Michael Catanzaro
Comment 4 2016-02-06 18:59:46 PST
It has to be at least related, because that function is pretty simple. I guess you have a problem with fontconfig, such that it cannot find any serif font. Crashing is the right thing to do in that case, but we should still handle it better
Ethan Sherriff
Comment 5 2016-02-07 03:07:57 PST
Fixed it! Reinstalling fontconfig with the configure option: --with-add-fonts="/Library/Fonts,/System/Library/Fonts,/Network/Library/Fonts" fixed it (credit to the maintainer of the fontconfig MacPorts port).
Jeremy Huddleston Sequoia
Comment 6 2016-02-07 08:23:22 PST
Can you please reopen this to add an informative release assertion here instead of crashing?
Ethan Sherriff
Comment 7 2016-02-07 08:32:56 PST
Sure, how would I do that?
Michael Catanzaro
Comment 8 2016-02-07 09:08:24 PST
See bug #141432 *** This bug has been marked as a duplicate of bug 141432 ***
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