Filed by: nbeleuzu [at] mozilla.com https://treeherder.mozilla.org/logviewer.html#?job_id=216797753&repo=autoland https://queue.taskcluster.net/v1/task/D-P96XlGQCaeIqVCwjrwfA/runs/0/artifacts/public/logs/live_backing.log [task 2018-12-13T13:31:55.522Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at mozilla::net::HttpChannelChild::HttpChannelChild, mozilla::net::nsHttpHandler::NewProxiedChannel2, mozilla::net::nsIOService::NewChannelFromURIWithProxyFlagsInternal, NewChannelFromURIWithProxyFlagsInternal [task 2018-12-13T13:31:55.524Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at mozilla::BasePrincipal::CreateCodebasePrincipal, mozilla::BasePrincipal::CreateCodebasePrincipal, nsScriptSecurityManager::GetChannelURIPrincipal, nsScriptSecurityManager::GetChannelResultPrincipal [task 2018-12-13T13:31:55.525Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at XPCNativeInterface::NewInstance, XPCNativeInterface::GetNewOrUsed, XPCWrappedNative::FindTearOff, xpc::HasInstance [task 2018-12-13T13:31:55.526Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at MakeUnique, AddTearOff, XPCWrappedNative::FindTearOff, XPCCallContext::CanCallNow [task 2018-12-13T13:31:55.528Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at ProtoAndIfaceCache, AllocateProtoAndIfaceCache, xpc::CreateGlobalObject, XPCWrappedNative::WrapNewGlobal [task 2018-12-13T13:31:55.529Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at Create, nsAtomTable::Atomize, mozilla::BasePrincipal::FinishInit, mozilla::ContentPrincipal::Init [task 2018-12-13T13:31:55.530Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at MakeUnique, AddTearOff, XPCWrappedNative::FindTearOff, XPCWrappedNative::FindTearOff [task 2018-12-13T13:31:55.532Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at Alloc, nsTSubstring, nsTSubstring, NonVoidStringToJsval [task 2018-12-13T13:31:55.533Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at mozilla::SchedulerGroup::CreateEventTargetFor, mozilla::SchedulerGroup::CreateEventTargets, mozilla::dom::TabGroup::TabGroup, mozilla::dom::nsIContentChild::GetConstructedEventTarget [task 2018-12-13T13:31:55.534Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at NS_GetXPTCallStub, InitStub, nsXPCWrappedJS::nsXPCWrappedJS, nsXPCWrappedJS::GetNewOrUsed [task 2018-12-13T13:31:55.535Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at XPCWrappedNative::WrapNewGlobal, xpc::InitClassesWithNewWrappedGlobal, mozJSComponentLoader::CreateLoaderGlobal, mozJSComponentLoader::PrepareObjectForLocation [task 2018-12-13T13:31:55.537Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at js_pod_arena_malloc, js_pod_malloc, maybe_pod_malloc, tryNewTenuredObject [task 2018-12-13T13:31:55.538Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at mozilla::net::nsHttpHandler::NewProxiedChannel2, mozilla::net::nsIOService::NewChannelFromURIWithProxyFlagsInternal, NewChannelFromURIWithProxyFlagsInternal, mozilla::net::nsIOService::NewChannelFromURIWithProxyFlags2 [task 2018-12-13T13:31:55.539Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at XPCNativeSet::NewInstance, XPCNativeSet::GetNewOrUsed, XPCWrappedNativeProto::GetNewOrUsed, XPCWrappedNative::GetNewOrUsed [task 2018-12-13T13:31:55.541Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at js_pod_arena_calloc, maybe_pod_calloc, pod_calloc, AllocScriptData [task 2018-12-13T13:31:55.542Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at mozilla::net::nsStandardURL::StartClone, CloneInternal, mozilla::net::nsStandardURL::Clone, InitFromURI [task 2018-12-13T13:31:55.543Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at EntrySlotOrCreate, EntrySlotOrCreate, mozilla::dom::ChildSHistory_Binding::CreateInterfaceObjects, mozilla::dom::GetPerInterfaceObjectHandle [task 2018-12-13T13:31:55.545Z] 13:31:55 ERROR - TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at NS_NewBackstagePass, mozJSComponentLoader::CreateLoaderGlobal, mozJSComponentLoader::PrepareObjectForLocation, mozJSComponentLoader::ObjectForLocation [task 2018-12-13T13:31:55.546Z] 13:31:55 INFO - runtests.py | Application ran for: 0:04:25.859028

I believe it's a test-only leakage since the log shows Console message: [JavaScript Warning: "Sending message that cannot be cloned. Are you trying to send an XPCOM object?" {file: "resource://specialpowers/SpecialPowersObserverAPI.js" line: 488}]