Bug 142697

Summary: Regression(r181487?): Speedometer is crashing on the perf bots
Product: WebKit Reporter: Chris Dumez <cdumez>
Component: JavaScriptCoreAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: ap, fpizlo, mark.lam, simon.fraser
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 141624    

Description Chris Dumez 2015-03-14 11:00:37 PDT 
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.
Comment 1 Chris Dumez 2015-03-14 11:06:51 PDT 
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.