he mentioned layout test is occasionally crashing in the GTK Debug bots. See this log: SVN rev 77917 / build #19084: Crashed SVN rev 77916 / build #19083: Crashed SVN rev 77915 / build #19082: Ok SVN rev 77914 / build #19081: Ok SVN rev 77912 / build #19080: Crashed Changes in between 77912 and 77916 seem to be unrelated, hence skipping the test in GTK while not fixing the problem. The crash, as dumped in the output: ASSERTION FAILED: m_rootObject->isValid() (../../Source/WebCore/bridge/jsc/BridgeJSC.cpp:109 void JSC::Bindings::Instance::willDestroyRuntimeObject(JSC::Bindings::RuntimeObject*)) Adding the author of the test to CC, perhaps he could help to find the root reason behind this.
*** This bug has been marked as a duplicate of bug 53716 ***