[Webkit-unassigned] [Bug 16058] New: ASSERTION FAILED: m_cgFont on Windows

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=16058

           Summary: ASSERTION FAILED: m_cgFont on Windows
           Product: WebKit
           Version: 525+ (Nightly build)
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Keywords: HasReduction, PlatformOnly
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: webkit at mattlilek.com


I've seen this assertion failure on both some Google search results and
Wikipedia.  On the Google search results at least, it's tripped by one
character that I've been unable to identify (on Windows it looks like an em
dash, on Mac OS X where it doesn't assert, it looks like an accented o). 
Doesn't cause anything bad in release build.

ASSERTION FAILED: m_cgFont
..\platform\win\FontPlatformDataWin.cpp(189) :
WebCore::FontPlatformData::FontPlatformData

        WebKit.dll!WebCore::FontPlatformData::FontPlatformData(HFONT__ *
font=0x3b0a098a, int size=16, bool bold=false, bool oblique=false)  Line 189 +
0x25 bytes      C++
        WebKit.dll!WebCore::FontCache::createFontPlatformData(const
WebCore::FontDescription & fontDescription={...}, const WebCore::AtomicString &
family={...})  Line 231 + 0x43 bytes        C++
        WebKit.dll!WebCore::FontCache::getCachedFontPlatformData(const
WebCore::FontDescription & fontDescription={...}, const WebCore::AtomicString &
familyName={...}, bool checkingAlternateName=false)  Line 149 + 0xd bytes      
 C++
        WebKit.dll!WebCore::FontCache::getFontDataForCharacters(const
WebCore::Font & font={...}, const wchar_t * characters=0x0012ec84, int
length=1)  Line 101 + 0x29 bytes   C++
        WebKit.dll!WebCore::Font::glyphDataForCharacter(int c=65533, bool
mirror=false)  Line 458 + 0x11 bytes  C++
        WebKit.dll!WebCore::WidthIterator::advance(int offset=1,
WebCore::GlyphBuffer * glyphBuffer=0x00000000)  Line 158 + 0x12 bytes  C++
        WebKit.dll!WebCore::Font::floatWidthForSimpleText(const
WebCore::TextRun & run={...}, const WebCore::TextStyle & style={...},
WebCore::GlyphBuffer * glyphBuffer=0x00000000)  Line 706  C++
        WebKit.dll!WebCore::Font::floatWidth(const WebCore::TextRun &
run={...}, const WebCore::TextStyle & style={...})  Line 698 + 0x12 bytes C++
        WebKit.dll!WebCore::Font::width(const WebCore::TextRun & run={...},
const WebCore::TextStyle & style={...})  Line 518 + 0x10 bytes      C++
        WebKit.dll!WebCore::RenderText::widthFromCache(const WebCore::Font &
f={...}, int start=0, int len=1, int xPos=0)  Line 416     C++
        WebKit.dll!WebCore::RenderText::calcPrefWidths(int leadWidth=0)  Line
616 + 0x1b bytes  C++
        WebKit.dll!WebCore::RenderText::maxPrefWidth()  Line 514 + 0x14 bytes  
C++
        WebKit.dll!WebCore::RenderText::width(unsigned int from=0, unsigned int
len=1, const WebCore::Font & f={...}, int xPos=0)  Line 1024 + 0x12 bytes      
C++
       
WebKit.dll!WebCore::RenderBlock::findNextLineBreak(WebCore::BidiIterator &
start={...}, WebCore::BidiResolver<WebCore::BidiIterator,WebCore::BidiRun> &
bidi={...})  Line 1809 + 0x37 bytes     C++
        WebKit.dll!WebCore::RenderBlock::layoutInlineChildren(bool
relayoutChildren=true, int & repaintTop=0, int & repaintBottom=0)  Line 969 +
0x1a bytes     C++
        WebKit.dll!WebCore::RenderBlock::layoutBlock(bool
relayoutChildren=true)  Line 583      C++
        WebKit.dll!WebCore::RenderBlock::layout()  Line 492 + 0x14 bytes       
C++
        WebKit.dll!WebCore::RenderObject::layoutIfNeeded()  Line 484 + 0x30
bytes       C++
        WebKit.dll!WebCore::RenderBlock::layoutBlockChildren(bool
relayoutChildren=true, int & maxFloatBottom=0)  Line 1228     C++
        WebKit.dll!WebCore::RenderBlock::layoutBlock(bool
relayoutChildren=true)  Line 587      C++
        WebKit.dll!WebCore::RenderBlock::layout()  Line 492 + 0x14 bytes       
C++
        WebKit.dll!WebCore::RenderObject::layoutIfNeeded()  Line 484 + 0x30
bytes       C++
        WebKit.dll!WebCore::RenderBlock::layoutBlockChildren(bool
relayoutChildren=true, int & maxFloatBottom=0)  Line 1228     C++
        WebKit.dll!WebCore::RenderBlock::layoutBlock(bool
relayoutChildren=true)  Line 587      C++
        WebKit.dll!WebCore::RenderBlock::layout()  Line 492 + 0x14 bytes       
C++
        WebKit.dll!WebCore::RenderView::layout()  Line 114      C++
        WebKit.dll!WebCore::FrameView::layout(bool allowSubtree=true)  Line 434
+ 0x12 bytes    C++
        WebKit.dll!WebCore::Document::implicitClose()  Line 1491        C++
        WebKit.dll!WebCore::FrameLoader::checkCallImplicitClose()  Line 1303   
C++
        WebKit.dll!WebCore::FrameLoader::checkCompleted()  Line 1249    C++
        WebKit.dll!WebCore::FrameLoader::finishedParsing()  Line 1197   C++
        WebKit.dll!WebCore::Document::finishedParsing()  Line 3518      C++
        WebKit.dll!WebCore::HTMLParser::finished()  Line 1435 + 0x18 bytes     
C++
        WebKit.dll!WebCore::HTMLTokenizer::end()  Line 1552     C++
        WebKit.dll!WebCore::HTMLTokenizer::finish()  Line 1592  C++
        WebKit.dll!WebCore::Document::finishParsing()  Line 1596 + 0x15 bytes  
C++
        WebKit.dll!WebCore::FrameLoader::endIfNotLoadingMainResource()  Line
1031       C++
        WebKit.dll!WebCore::FrameLoader::end()  Line 1009       C++
        WebKit.dll!WebCore::DocumentLoader::finishedLoading()  Line 321 C++
        WebKit.dll!WebCore::FrameLoader::finishedLoading()  Line 2755   C++
        WebKit.dll!WebCore::MainResourceLoader::didFinishLoading()  Line 305   
C++
       
WebKit.dll!WebCore::ResourceLoader::didFinishLoading(WebCore::ResourceHandle *
__formal=0x050bf6c8)  Line 361 + 0xf bytes       C++
        WebKit.dll!WebCore::didFinishLoading(_CFURLConnection *
conn=0x03dd5da0, const void * clientInfo=0x050bf6c8)  Line 105 + 0x1e bytes    
C++


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