74662 2011-12-15 16:06:02 -0800 wkGetGlyphsForCharacters() sometimes crashes with UVS 2011-12-15 16:43:59 -0800 1 1 1 Unclassified WebKit Platform 528+ (Nightly build) Unspecified Unspecified NEW P2 Normal --- 1 bashi webkit-unassigned mitz oldest_to_newest 522300 0 bashi 2011-12-15 16:06:02 -0800 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. 522329 1 bashi 2011-12-15 16:43:59 -0800 Hi mitz, Do you have any ideas about this crash? You reviewed https://bugs.webkit.org/show_bug.cgi?id=46973 which added the function.