The following layout test is failing on Windows (Debug) because the document is unexpectedly present in the page cache. fast/frames/flattening/iframe-flattening-simple.html Probable cause: For some reason, the active document is still present in the page cache. Document& document = *frame().document(); >>> ASSERT(!document.inPageCache()); I think this is happening for the same reason that the hack was added to 'void HistoryController::invalidateCurrentItemCachedPage()' to get rid of stale cached documents. Although this is repeatably crashing in debug on windows, it might be the reason the Mac test for this is flaky.
Created attachment 244607 [details] Crash log