[Webkit-unassigned] [Bug 74662] New: wkGetGlyphsForCharacters() sometimes crashes with UVS

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=74662

           Summary: wkGetGlyphsForCharacters() sometimes crashes with UVS
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Platform
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: bashi at chromium.org


For example: http://build.chromium.org/p/chromium.webkit/builders/Webkit%20Mac10.6%20(CG)/builds/3463/steps/webkit_tests/logs/stdio

2011-12-15 15:29:09,735 40363 single_test_runner.py:194 DEBUG worker/6 Stacktrace for fast/text/unicode-variation-selector.html:
    0   DumpRenderTree                      0x47e33a5a 0x0 + 1206073946
    1   DumpRenderTree                      0x47e54cc1 0x0 + 1206209729
    2   libSystem.B.dylib                   0x9603e05b _sigtramp + 43
    3   ???                                 0xffffffff 0x0 + 4294967295
    4   libFontParser.dylib                 0x93fa126e TFormat14UVSTable::Map(int, int, unsigned short*) const + 100
    5   libFontParser.dylib                 0x93fa8394 unsigned int TFormat12UTF16cmapTable::MapT<true>(unsigned short const*, unsigned short*, unsigned int&) const + 404
    6   libFontParser.dylib                 0x93f6ea23 TcmapUnicodeTable::Map(unsigned short const*, unsigned short*, unsigned int&) const + 793
    7   libFontParser.dylib                 0x93f6db5d TSFNTFont::GetGlyphsPerCharacters(unsigned short const*, unsigned short*, unsigned int&, bool) const + 69
    8   libFontParser.dylib                 0x93f6da7f FPFontGetGlyphsForUnichars + 544
 :
 :

This looks the same stacktrace as https://bugs.webkit.org/show_bug.cgi?id=50999#c3. As mentioned in the comment, valid arguments were passed here.

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