Bug 1556857 Comment 3 Edit History

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Original comment by
on 
Backed out changeset afa5d3807c8b (Bug 1556857) for mochitest failure at builds/worker/workspace/build/src/obj-firefox/dist/include/mozilla/RefPtr.h:268.

Push with failures: https://treeherder.mozilla.org/#/jobs?repo=autoland&resultStatus=testfailed%2Cbusted%2Cexception&classifiedState=unclassified&selectedJob=250044796&revision=afa5d3807c8b5810203718e158fa4b185e109f55

Failure log: https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=250049129&repo=autoland&lineNumber=12412

Backout link: https://treeherder.mozilla.org/#/jobs?repo=autoland&resultStatus=testfailed%2Cbusted%2Cexception&classifiedState=unclassified&selectedJob=250044796&revision=ead19b73c93d934f2ac5b993d27771024227ff78

```
[task 2019-06-04T23:27:02.976Z] 23:27:02     INFO - TEST-START | dom/media/webaudio/test/test_bug827541.html
[task 2019-06-04T23:27:03.114Z] 23:27:03     INFO - GECKO(2590) | AddressSanitizer:DEADLYSIGNAL
[task 2019-06-04T23:27:03.115Z] 23:27:03     INFO - GECKO(2590) | =================================================================
[task 2019-06-04T23:27:03.116Z] 23:27:03    ERROR - GECKO(2590) | ==2659==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000020 (pc 0x7fcaf832957f bp 0x7ffc7f1fa270 sp 0x7ffc7f1fa140 T0)
[task 2019-06-04T23:27:03.116Z] 23:27:03     INFO - GECKO(2590) | ==2659==The signal is caused by a READ memory access.
[task 2019-06-04T23:27:03.117Z] 23:27:03     INFO - GECKO(2590) | ==2659==Hint: address points to the zero page.
[task 2019-06-04T23:27:03.758Z] 23:27:03     INFO - GECKO(2590) |     #0 0x7fcaf832957e in get /builds/worker/workspace/build/src/obj-firefox/dist/include/mozilla/RefPtr.h:268:27
[task 2019-06-04T23:27:03.760Z] 23:27:03     INFO - GECKO(2590) |     #1 0x7fcaf832957e in operator-> /builds/worker/workspace/build/src/obj-firefox/dist/include/mozilla/RefPtr.h:298
[task 2019-06-04T23:27:03.762Z] 23:27:03     INFO - GECKO(2590) |     #2 0x7fcaf832957e in NodePrincipal /builds/worker/workspace/build/src/dom/base/nsINode.h:855
[task 2019-06-04T23:27:03.764Z] 23:27:03     INFO - GECKO(2590) |     #3 0x7fcaf832957e in SiteAutoplayPerm /builds/worker/workspace/build/src/dom/media/AutoplayPolicy.cpp:69
[task 2019-06-04T23:27:03.765Z] 23:27:03     INFO - GECKO(2590) |     #4 0x7fcaf832957e in mozilla::dom::AutoplayPolicy::IsAllowedToPlay(mozilla::dom::AudioContext const&) /builds/worker/workspace/build/src/dom/media/AutoplayPolicy.cpp:248
[task 2019-06-04T23:27:03.783Z] 23:27:03     INFO - GECKO(2590) |     #5 0x7fcaf8c484ba in mozilla::dom::AudioContext::AudioContext(nsPIDOMWindowInner*, bool, unsigned int, unsigned int, float) /builds/worker/workspace/build/src/dom/media/webaudio/AudioContext.cpp:173:31
[task 2019-06-04T23:27:03.785Z] 23:27:03     INFO - GECKO(2590) |     #6 0x7fcaf8c4ac38 in mozilla::dom::AudioContext::Constructor(mozilla::dom::GlobalObject const&, mozilla::dom::AudioContextOptions const&, mozilla::ErrorResult&) /builds/worker/workspace/build/src/dom/media/webaudio/AudioContext.cpp:282:11
[task 2019-06-04T23:27:03.835Z] 23:27:03     INFO - GECKO(2590) |     #7 0x7fcaf52ebf3f in mozilla::dom::AudioContext_Binding::_constructor(JSContext*, unsigned int, JS::Value*) /builds/worker/workspace/build/src/obj-firefox/dom/bindings/AudioContextBinding.cpp:648:58
[task 2019-06-04T23:27:03.856Z] 23:27:03     INFO - GECKO(2590) |     #8 0x7fcafdd12ad7 in CallJSNative /builds/worker/workspace/build/src/js/src/vm/Interpreter.cpp:448:13
[task 2019-06-04T23:27:03.859Z] 23:27:03     INFO - GECKO(2590) |     #9 0x7fcafdd12ad7 in CallJSNativeConstructor /builds/worker/workspace/build/src/js/src/vm/Interpreter.cpp:464
[task 2019-06-04T23:27:03.861Z] 23:27:03     INFO - GECKO(2590) |     #10 0x7fcafdd12ad7 in InternalConstruct(JSContext*, js::AnyConstructArgs const&) /builds/worker/workspace/build/src/js/src/vm/Interpreter.cpp:657
[task 2019-06-04T23:27:03.862Z] 23:27:03     INFO - GECKO(2590) |     #11 0x7fcafdcef444 in Interpret(JSContext*, js::RunState&) /builds/worker/workspace/build/src/js/src/vm/Interpreter.cpp:3078:16
[task 2019-06-04T23:27:03.865Z] 23:27:03     INFO - GECKO(2590) |     #12 0x7fcafdcd9058 in js::RunScript(JSContext*, js::RunState&) /builds/worker/workspace/build/src/js/src/vm/Interpreter.cpp:425:10
[task 2019-06-04T23:27:03.867Z] 23:27:03     INFO - GECKO(2590) |     #13 0x7fcafdd156ac in js::ExecuteKernel(JSContext*, JS::Handle<JSScript*>, JSObject&, JS::Value const&, js::AbstractFramePtr, JS::Value*) /builds/worker/workspace/build/src/js/src/vm/Interpreter.cpp:787:13
[task 2019-06-04T23:27:03.869Z] 23:27:03     INFO - GECKO(2590) |     #14 0x7fcafdd15e59 in js::Execute(JSContext*, JS::Handle<JSScript*>, JSObject&, JS::Value*) /builds/worker/workspace/build/src/js/src/vm/Interpreter.cpp:820:10
[task 2019-06-04T23:27:03.953Z] 23:27:03     INFO - GECKO(2590) |     #15 0x7fcafdf9e5ba in ExecuteScript(JSContext*, JS::Handle<JS::StackGCVector<JSObject*, js::TempAllocPolicy> >, JS::Handle<JSScript*>, JS::Value*) /builds/worker/workspace/build/src/js/src/vm/CompilationAndEvaluation.cpp:468:10
[task 2019-06-04T23:27:03.972Z] 23:27:03     INFO - GECKO(2590) |     #16 0x7fcaf512b4f4 in nsJSUtils::ExecutionContext::ExecScript() /builds/worker/workspace/build/src/dom/base/nsJSUtils.cpp:387:8
[task 2019-06-04T23:27:03.989Z] 23:27:03     INFO - GECKO(2590) |     #17 0x7fcaf9aa76b3 in mozilla::dom::ExecuteCompiledScript(JSContext*, mozilla::dom::ScriptLoadRequest*, nsJSUtils::ExecutionContext&) /builds/worker/workspace/build/src/dom/script/ScriptLoader.cpp:2548:16
[task 2019-06-04T23:27:03.992Z] 23:27:03     INFO - GECKO(2590) |     #18 0x7fcaf9aa4751 in mozilla::dom::ScriptLoader::EvaluateScript(mozilla::dom::ScriptLoadRequest*) /builds/worker/workspace/build/src/dom/script/ScriptLoader.cpp:2768:20
[task 2019-06-04T23:27:03.993Z] 23:27:03     INFO - GECKO(2590) |     #19 0x7fcaf9a9d0d8 in mozilla::dom::ScriptLoader::ProcessRequest(mozilla::dom::ScriptLoadRequest*) /builds/worker/workspace/build/src/dom/script/ScriptLoader.cpp:2275:10
[task 2019-06-04T23:27:03.996Z] 23:27:03     INFO - GECKO(2590) |     #20 0x7fcaf9a938de in mozilla::dom::ScriptLoader::ProcessPendingRequests() /builds/worker/workspace/build/src/dom/script/ScriptLoader.cpp:3023:5
[task 2019-06-04T23:27:03.998Z] 23:27:03     INFO - GECKO(2590) |     #21 0x7fcaf9aba724 in applyImpl<mozilla::dom::ScriptLoader, void (mozilla::dom::ScriptLoader::*)()> /builds/worker/workspace/build/src/obj-firefox/dist/include/nsThreadUtils.h:1122:12
[task 2019-06-04T23:27:04.001Z] 23:27:04     INFO - GECKO(2590) |     #22 0x7fcaf9aba724 in apply<mozilla::dom::ScriptLoader, void (mozilla::dom::ScriptLoader::*)()> /builds/worker/workspace/build/src/obj-firefox/dist/include/nsThreadUtils.h:1128
[task 2019-06-04T23:27:04.003Z] 23:27:04     INFO - GECKO(2590) |     #23 0x7fcaf9aba724 in mozilla::detail::RunnableMethodImpl<mozilla::dom::ScriptLoader*, void (mozilla::dom::ScriptLoader::*)(), true, (mozilla::RunnableKind)0>::Run() /builds/worker/workspace/build/src/obj-firefox/dist/include/nsThreadUtils.h:1174
```

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