It is important that in MemoryInstrumentationTest.instrumentedWithMultipleAncestors ancestorPointer wasn't equal to descendantPointer.
Created attachment 169891 [details] Patch
Comment on attachment 169891 [details] Patch Clearing flags on attachment: 169891 Committed r132068: <http://trac.webkit.org/changeset/132068>
All reviewed patches have been landed. Closing bug.