142697 2015-03-14 11:00:37 -0700 Regression(r181487?): Speedometer is crashing on the perf bots 2015-03-15 00:23:49 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 141624 1 cdumez webkit-unassigned ap fpizlo mark.lam simon.fraser oldest_to_newest 1077169 0 cdumez 2015-03-14 11:00:37 -0700 Speedometer started crashing on the perf bots: Running Speedometer/Full.html (144 of 144) error: Speedometer/Full.html 1 0x113d6747e JSC::DFG::(anonymous namespace)::PutStackSinkingPhase::run() 2 0x113d5ded4 JSC::DFG::performPutStackSinking(JSC::DFG::Graph&) 3 0x113db9d99 JSC::DFG::Plan::compileInThreadImpl(JSC::DFG::LongLivedState&) 4 0x113db96dd JSC::DFG::Plan::compileInThread(JSC::DFG::LongLivedState&, JSC::DFG::ThreadData*) 5 0x113e45042 JSC::DFG::Worklist::runThread(JSC::DFG::ThreadData*) 6 0x1141cf833 WTF::threadEntryPoint(void*) 7 0x1141cfd1f WTF::wtfThreadEntryPoint(void*) 8 0x7fff8e583268 _pthread_body 9 0x7fff8e5831e5 _pthread_body 10 0x7fff8e58141d thread_start https://build.webkit.org/builders/Apple%20Yosemite%20Release%20WK2%20%28Perf%29/builds/1263/steps/perf-test/logs/stdio There are a few commits in the range but r181485 seems the most likely cause. 1077171 1 cdumez 2015-03-14 11:06:51 -0700 Actually, Simon suspects https://trac.webkit.org/changeset/181487 instead and rolled it out in https://trac.webkit.org/r181498 already. Let's see if the bots recover.