#0  0x0325797c in WebCore::StringImpl::length (this=0x80010150) at text/StringImpl.h:86
#1  0x0326139c in WebCore::StringHash::equal (a=0x80010150, b=0xb0ad040) at StringHash.h:44
#2  0x03a9f7a0 in WTF::HashMapTranslator<std::pair<WebCore::StringImpl*, WTF::RefPtr<WebCore::FilterEffect> >, WTF::PairHashTraits<WTF::HashTraits<WebCore::StringImpl*>, WTF::HashTraits<WTF::RefPtr<WebCore::FilterEffect> > >, WebCore::StringHash>::equal (a=@0x9639a940, b=@0xbfffcefc) at HashMap.h:103
#3  0x03aa1008 in WTF::HashTable<WebCore::StringImpl*, std::pair<WebCore::StringImpl*, WTF::RefPtr<WebCore::FilterEffect> >, WTF::PairFirstExtractor<std::pair<WebCore::StringImpl*, WTF::RefPtr<WebCore::FilterEffect> > >, WebCore::StringHash, WTF::PairHashTraits<WTF::HashTraits<WebCore::StringImpl*>, WTF::HashTraits<WTF::RefPtr<WebCore::FilterEffect> > >, WTF::HashTraits<WebCore::StringImpl*> >::add<WebCore::StringImpl*, WTF::RefPtr<WebCore::FilterEffect>, WTF::HashMapTranslator<std::pair<WebCore::StringImpl*, WTF::RefPtr<WebCore::FilterEffect> >, WTF::PairHashTraits<WTF::HashTraits<WebCore::StringImpl*>, WTF::HashTraits<WTF::RefPtr<WebCore::FilterEffect> > >, WebCore::StringHash> > (this=0xbfffd078, key=@0xbfffcefc, extra=@0xbfffcef8) at HashTable.h:652
#4  0x03aa11d8 in WTF::HashMap<WebCore::StringImpl*, WTF::RefPtr<WebCore::FilterEffect>, WebCore::StringHash, WTF::HashTraits<WebCore::StringImpl*>, WTF::HashTraits<WTF::RefPtr<WebCore::FilterEffect> > >::inlineAdd (this=0xbfffd078, key=@0xbfffcefc, mapped=@0xbfffcef8) at HashMap.h:182
#5  0x03aa1240 in WTF::HashMap<WebCore::StringImpl*, WTF::RefPtr<WebCore::FilterEffect>, WebCore::StringHash, WTF::HashTraits<WebCore::StringImpl*>, WTF::HashTraits<WTF::RefPtr<WebCore::FilterEffect> > >::set (this=0xbfffd078, key=@0xbfffcefc, mapped=@0xbfffcef8) at HashMap.h:189
#6  0x03aa1580 in WebCore::FilterBuilder::add (this=0xbfffd070, id=@0xbfffcf88, effect=@0xbfffcf84) at FilterBuilder.h:44