这些是bugly输出的错误堆栈
0 JavaScriptCore JSC::speculationFromStructure(JSC::Structure*)
1 JavaScriptCore JSC::CodeBlock::updateAllPredictionsAndCountLiveness(unsigned int&, unsigned int&) + 352
2 JavaScriptCore JSC::CodeBlock::UnconditionalFinalizer::finalizeUnconditionally() + 36
3 JavaScriptCore JSC::Heap::runEndPhase(JSC::GCConductor) + 1604
4 JavaScriptCore JSC::Heap::runCurrentPhase(JSC::GCConductor, JSC::CurrentThreadState*) + 220
5 JavaScriptCore JSC::Heap:
:work() + 32
6 JavaScriptCore _ZN3WTF8FunctionIFvvEE15CallableWrapperIZNS_15AutomaticThread5startERKNS_14AbstractLockerEE3$_0E4callEv + 360
7 JavaScriptCore WTF::threadEntryPoint(void*) + 120
8 JavaScriptCore WTF::wtfThreadEntryPoint(void*) + 84
9 libsystem_pthread.dylib __pthread_body + 308
10 libsystem_pthread.dylib __pthread_body
