[Webkit-unassigned] [Bug 71139] New: chromium/snowleopard crashes in FontFallbackList, fails fontCache()->generation() == m_generation

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=71139

           Summary: chromium/snowleopard crashes in FontFallbackList,
                    fails fontCache()->generation() == m_generation
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: johnnyg at google.com


This is causing several layout tests in chromium to crash sporadically
fast/parser/close-while-stopping.html
http/tests/security/cross-frame-access-custom.html
fast/frames/content-opacity-2.html

All with this callstack:

ASSERTION FAILED: fontCache()->generation() == m_generation
/b/build/slave/Webkit_Mac10_6__CG__dbg_/build/src/third_party/WebKit/Source/WebCore/WebCore.gyp/../platform/graphics/FontFallbackList.cpp(104) : const WebCore::FontData *WebCore::FontFallbackList::fontDataAt(const WebCore::Font *, unsigned int) const
1   0x65e9ace8 WebCore::FontFallbackList::fontDataAt(WebCore::Font const*, unsigned int) const
2   0x65fe9fb9 WebCore::FontFallbackList::primaryFontData(WebCore::Font const*) const
3   0x65fe9f24 WebCore::FontFallbackList::primarySimpleFontData(WebCore::Font const*)
4   0x65fe10eb WebCore::Font::primaryFont() const
5   0x66b1b93d WebCore::textRunNeedsRenderingContext(WebCore::Font const&)
6   0x66b0d7ef WebCore::RenderBlock::constructTextRun(WebCore::RenderObject*, WebCore::Font const&, unsigned short const*, int, WebCore::RenderStyle*, unsigned int, unsigned int)
7   0x66cdc978 WebCore::RenderText::computePreferredLogicalWidths(float, WTF::HashSet<WebCore::SimpleFontData const*, WTF::PtrHash<WebCore::SimpleFontData const*>, WTF::HashTraits<WebCore::SimpleFontData const*> >&, WebCore::GlyphOverflow&)
8   0x66cdba6d WebCore::RenderText::computePreferredLogicalWidths(float)
9   0x66cdb280 WebCore::RenderText::trimmedPrefWidths(float, float&, bool&, float&, bool&, bool&, bool&, float&, float&, float&, float&, bool&)
10  0x66b065e6 WebCore::RenderBlock::computeInlinePreferredLogicalWidths()
11  0x66b05771 WebCore::RenderBlock::computePreferredLogicalWidths()
12  0x66b7e7cc WebCore::RenderBox::minPreferredLogicalWidth() const
13  0x66b06d67 WebCore::RenderBlock::computeBlockPreferredLogicalWidths()
14  0x66b05784 WebCore::RenderBlock::computePreferredLogicalWidths()
15  0x66b7e7cc WebCore::RenderBox::minPreferredLogicalWidth() const
16  0x66b06d67 WebCore::RenderBlock::computeBlockPreferredLogicalWidths()
17  0x66b05784 WebCore::RenderBlock::computePreferredLogicalWidths()
18  0x66b7e7cc WebCore::RenderBox::minPreferredLogicalWidth() const
19  0x66b06d67 WebCore::RenderBlock::computeBlockPreferredLogicalWidths()
20  0x66b05784 WebCore::RenderBlock::computePreferredLogicalWidths()
21  0x66d044ed WebCore::RenderView::computePreferredLogicalWidths()
22  0x66b7e7cc WebCore::RenderBox::minPreferredLogicalWidth() const
23  0x6421313a WebKit::WebFrameImpl::contentsPreferredWidth() const
24  0x6413c007 WebViewHost::didUpdateLayout(WebKit::WebFrame*)
25  0x6413c089 non-virtual thunk to WebViewHost::didUpdateLayout(WebKit::WebFrame*)
26  0x64169747 WebKit::ChromeClientImpl::layoutUpdated(WebCore::Frame*) const
27  0x667cf2b7 WebCore::FrameView::layout(bool)
28  0x667ca132 WebCore::FrameView::layoutTimerFired(WebCore::Timer<WebCore::FrameView>*)
29  0x667e5df7 WebCore::Timer<WebCore::FrameView>::fired()
30  0x65e033c1 WebCore::ThreadTimers::sharedTimerFiredInternal()
31  0x65e0314f WebCore::ThreadTimers::sharedTimerFired()

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