When running the above test (it's from Microsoft's ietestcenter, and has been integrated into webkit at LayoutTests/ietestcenter/css3/flexbox/flexbox-ordinal-group-001.htm) with a debug build, the following assertion is hit:
STDERR: ASSERTION FAILED: !HashTranslator::equal(KeyTraits::emptyValue(), key)
STDERR: ../../../../Source/WTF/wtf/HashTable.h(495) : void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::checkKey(const T&) [with HashTranslator = WTF::IdentityHashTranslator<WTF::IntHash<unsigned int> >, T = unsigned int, Key = unsigned int, Value = unsigned int, Extractor = WTF::IdentityExtractor, HashFunctions = WTF::IntHash<unsigned int>, Traits = WTF::HashTraits<unsigned int>, KeyTraits = WTF::HashTraits<unsigned int>]
According to specification, http://www.w3.org/TR/2009/WD-css3-flexbox-20090723/#propdef-box-ordinal-group mentioned in testcase, this property is a natural number value with an initial value is 1.
Is this a valid testcase with box-ordinal-group having value of zero?
Skipped this test on Windows in r118457
Created attachment 146083 [details]
Comment on attachment 146083 [details]
Clearing flags on attachment: 146083
Committed r119620: <http://trac.webkit.org/changeset/119620>
All reviewed patches have been landed. Closing bug.