Found while fuzzing m-c 20230305-c8b5160f1983 (--enable-debug --enable-fuzzing)

To reproduce via Grizzly Replay:

$ pip install fuzzfetch grizzly-framework
$ python -m fuzzfetch -d --fuzzing -n firefox
$ python -m grizzly.replay ./firefox/firefox testcase.html

Assertion failure: !mMightHaveUnreportedJSException, at /builds/worker/workspace/obj-build/dist/include/mozilla/ErrorResult.h:584

#0 0x7f7d46e13a21 in mozilla::binding_danger::TErrorResult<mozilla::binding_danger::AssertAndSuppressCleanupPolicy>::~TErrorResult() /builds/worker/workspace/obj-build/dist/include/mozilla/ErrorResult.h
#1 0x7f7d48965dcd in nsRange::CloneParentsBetween(nsINode*, nsINode*, nsINode**, nsINode**) /builds/worker/checkouts/gecko/dom/base/nsRange.cpp:2169:3
#2 0x7f7d4896352f in nsRange::CutContents(mozilla::dom::DocumentFragment**, mozilla::ErrorResult&) /builds/worker/checkouts/gecko/dom/base/nsRange.cpp:1998:13
#3 0x7f7d48969d8a in ExtractContents /builds/worker/checkouts/gecko/dom/base/nsRange.cpp:2066:3
#4 0x7f7d48969d8a in nsRange::SurroundContents(nsINode&, mozilla::ErrorResult&) /builds/worker/checkouts/gecko/dom/base/nsRange.cpp:2516:38
#5 0x7f7d494849f7 in mozilla::dom::Range_Binding::surroundContents(JSContext*, JS::Handle<JSObject*>, void*, JSJitMethodCallArgs const&) /builds/worker/workspace/obj-build/dom/bindings/RangeBinding.cpp:999:24
#6 0x7f7d4a15c5e2 in bool mozilla::dom::binding_detail::GenericMethod<mozilla::dom::binding_detail::NormalThisPolicy, mozilla::dom::binding_detail::ThrowExceptions>(JSContext*, unsigned int, JS::Value*) /builds/worker/checkouts/gecko/dom/bindings/BindingUtils.cpp:3318:13
#7 0x7f7d4e6e2c56 in CallJSNative(JSContext*, bool (*)(JSContext*, unsigned int, JS::Value*), js::CallReason, JS::CallArgs const&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:459:13
#8 0x7f7d4e6e257f in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:553:12
#9 0x7f7d4e6d41df in CallFromStack /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:625:10
#10 0x7f7d4e6d41df in Interpret(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:3368:16
#11 0x7f7d4e6c789e in js::RunScript(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:431:13
#12 0x7f7d4e6e247b in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:585:13
#13 0x7f7d4e6e39ac in js::Call(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, js::AnyInvokeArgs const&, JS::MutableHandle<JS::Value>, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:652:8
#14 0x7f7d4e7a3c3c in JS::Call(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, JS::HandleValueArray const&, JS::MutableHandle<JS::Value>) /builds/worker/checkouts/gecko/js/src/vm/CallAndConstruct.cpp:117:10
#15 0x7f7d49e342f3 in mozilla::dom::EventListener::HandleEvent(mozilla::dom::BindingCallContext&, JS::Handle<JS::Value>, mozilla::dom::Event&, mozilla::ErrorResult&) /builds/worker/workspace/obj-build/dom/bindings/EventListenerBinding.cpp:62:8
#16 0x7f7d4a772a06 in void mozilla::dom::EventListener::HandleEvent<mozilla::dom::EventTarget*>(mozilla::dom::EventTarget* const&, mozilla::dom::Event&, mozilla::ErrorResult&, char const*, mozilla::dom::CallbackObject::ExceptionHandling, JS::Realm*) /builds/worker/workspace/obj-build/dist/include/mozilla/dom/EventListenerBinding.h:65:12
#17 0x7f7d4a77272c in mozilla::EventListenerManager::HandleEventSubType(mozilla::EventListenerManager::Listener*, mozilla::dom::Event*, mozilla::dom::EventTarget*) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1308:43
#18 0x7f7d4a7733d9 in mozilla::EventListenerManager::HandleEventInternal(nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event**, mozilla::dom::EventTarget*, nsEventStatus*, bool) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1504:17
#19 0x7f7d4a768216 in HandleEvent /builds/worker/checkouts/gecko/dom/events/EventListenerManager.h:395:5
#20 0x7f7d4a768216 in mozilla::EventTargetChainItem::HandleEvent(mozilla::EventChainPostVisitor&, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:347:17
#21 0x7f7d4a767917 in mozilla::EventTargetChainItem::HandleEventTargetChain(nsTArray<mozilla::EventTargetChainItem>&, mozilla::EventChainPostVisitor&, mozilla::EventDispatchingCallback*, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:585:14
#22 0x7f7d4a769f05 in mozilla::EventDispatcher::Dispatch(nsISupports*, nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event*, nsEventStatus*, mozilla::EventDispatchingCallback*, nsTArray<mozilla::dom::EventTarget*>*) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:1122:11
#23 0x7f7d487ac6e6 in nsContentUtils::MaybeFireNodeRemoved(nsINode*, nsINode*) /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:5070:5
#24 0x7f7d48c923f3 in nsINode::ReplaceOrInsertBefore(bool, nsINode*, nsINode*, mozilla::ErrorResult&) /builds/worker/checkouts/gecko/dom/base/nsINode.cpp:2526:7
#25 0x7f7d492419cb in InsertBefore /builds/worker/checkouts/gecko/dom/base/nsINode.h:2069:12
#26 0x7f7d492419cb in AppendChild /builds/worker/checkouts/gecko/dom/base/nsINode.h:2076:12
#27 0x7f7d492419cb in mozilla::dom::Node_Binding::appendChild(JSContext*, JS::Handle<JSObject*>, void*, JSJitMethodCallArgs const&) /builds/worker/workspace/obj-build/dom/bindings/NodeBinding.cpp:997:60
#28 0x7f7d4a15c5e2 in bool mozilla::dom::binding_detail::GenericMethod<mozilla::dom::binding_detail::NormalThisPolicy, mozilla::dom::binding_detail::ThrowExceptions>(JSContext*, unsigned int, JS::Value*) /builds/worker/checkouts/gecko/dom/bindings/BindingUtils.cpp:3318:13
#29 0x7f7d4e6e2c56 in CallJSNative(JSContext*, bool (*)(JSContext*, unsigned int, JS::Value*), js::CallReason, JS::CallArgs const&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:459:13
#30 0x7f7d4e6e257f in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:553:12
#31 0x7f7d4e6d41df in CallFromStack /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:625:10
#32 0x7f7d4e6d41df in Interpret(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:3368:16
#33 0x7f7d4e6c789e in js::RunScript(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:431:13
#34 0x7f7d4e6e247b in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:585:13
#35 0x7f7d4e6e39ac in js::Call(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, js::AnyInvokeArgs const&, JS::MutableHandle<JS::Value>, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:652:8
#36 0x7f7d4e7a3c3c in JS::Call(JSContext*, JS::Handle<JS::Value>, JS::Handle<JS::Value>, JS::HandleValueArray const&, JS::MutableHandle<JS::Value>) /builds/worker/checkouts/gecko/js/src/vm/CallAndConstruct.cpp:117:10
#37 0x7f7d49e31851 in mozilla::dom::EventHandlerNonNull::Call(mozilla::dom::BindingCallContext&, JS::Handle<JS::Value>, mozilla::dom::Event&, JS::MutableHandle<JS::Value>, mozilla::ErrorResult&) /builds/worker/workspace/obj-build/dom/bindings/EventHandlerBinding.cpp:65:37
#38 0x7f7d4a792e59 in void mozilla::dom::EventHandlerNonNull::Call<nsCOMPtr<mozilla::dom::EventTarget>>(nsCOMPtr<mozilla::dom::EventTarget> const&, mozilla::dom::Event&, JS::MutableHandle<JS::Value>, mozilla::ErrorResult&, char const*, mozilla::dom::CallbackObject::ExceptionHandling, JS::Realm*) /builds/worker/workspace/obj-build/dist/include/mozilla/dom/EventHandlerBinding.h:82:12
#39 0x7f7d4a792046 in mozilla::JSEventHandler::HandleEvent(mozilla::dom::Event*) /builds/worker/checkouts/gecko/dom/events/JSEventHandler.cpp:199:12
#40 0x7f7d4a77276d in mozilla::EventListenerManager::HandleEventSubType(mozilla::EventListenerManager::Listener*, mozilla::dom::Event*, mozilla::dom::EventTarget*) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1314:22
#41 0x7f7d4a7733d9 in mozilla::EventListenerManager::HandleEventInternal(nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event**, mozilla::dom::EventTarget*, nsEventStatus*, bool) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1504:17
#42 0x7f7d4a768216 in HandleEvent /builds/worker/checkouts/gecko/dom/events/EventListenerManager.h:395:5
#43 0x7f7d4a768216 in mozilla::EventTargetChainItem::HandleEvent(mozilla::EventChainPostVisitor&, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:347:17
#44 0x7f7d4a76774b in mozilla::EventTargetChainItem::HandleEventTargetChain(nsTArray<mozilla::EventTargetChainItem>&, mozilla::EventChainPostVisitor&, mozilla::EventDispatchingCallback*, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:549:16
#45 0x7f7d4a769f05 in mozilla::EventDispatcher::Dispatch(nsISupports*, nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event*, nsEventStatus*, mozilla::EventDispatchingCallback*, nsTArray<mozilla::dom::EventTarget*>*) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:1122:11
#46 0x7f7d4c63a9a4 in nsDocumentViewer::LoadComplete(nsresult) /builds/worker/checkouts/gecko/layout/base/nsDocumentViewer.cpp:1082:7
#47 0x7f7d4dc8aea0 in nsDocShell::EndPageLoad(nsIWebProgress*, nsIChannel*, nsresult) /builds/worker/checkouts/gecko/docshell/base/nsDocShell.cpp:6478:20
#48 0x7f7d4dc8a44b in nsDocShell::OnStateChange(nsIWebProgress*, nsIRequest*, unsigned int, nsresult) /builds/worker/checkouts/gecko/docshell/base/nsDocShell.cpp:5871:7
#49 0x7f7d4dc8bd46 in non-virtual thunk to nsDocShell::OnStateChange(nsIWebProgress*, nsIRequest*, unsigned int, nsresult) /builds/worker/checkouts/gecko/docshell/base/nsDocShell.cpp
#50 0x7f7d47e6b8b8 in nsDocLoader::DoFireOnStateChange(nsIWebProgress*, nsIRequest*, int&, nsresult) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:1380:3
#51 0x7f7d47e6aea2 in nsDocLoader::doStopDocumentLoad(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:978:14
#52 0x7f7d47e69155 in nsDocLoader::DocLoaderIsEmpty(bool, mozilla::Maybe<nsresult> const&) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:797:9
#53 0x7f7d47e6a335 in nsDocLoader::OnStopRequest(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:680:5
#54 0x7f7d4dcbdf3e in nsDocShell::OnStopRequest(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/docshell/base/nsDocShell.cpp:13904:23
#55 0x7f7d470df68f in mozilla::net::nsLoadGroup::NotifyRemovalObservers(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/netwerk/base/nsLoadGroup.cpp:631:22
#56 0x7f7d470e0bb3 in mozilla::net::nsLoadGroup::RemoveRequest(nsIRequest*, nsISupports*, nsresult) /builds/worker/checkouts/gecko/netwerk/base/nsLoadGroup.cpp:535:10
#57 0x7f7d48a1b3a9 in mozilla::dom::Document::DoUnblockOnload() /builds/worker/checkouts/gecko/dom/base/Document.cpp:11516:18
#58 0x7f7d489e766b in mozilla::dom::Document::UnblockOnload(bool) /builds/worker/checkouts/gecko/dom/base/Document.cpp:11454:9
#59 0x7f7d48a024ca in mozilla::dom::Document::DispatchContentLoadedEvents() /builds/worker/checkouts/gecko/dom/base/Document.cpp:7992:3
#60 0x7f7d48ab2c78 in applyImpl<mozilla::dom::Document, void (mozilla::dom::Document::*)()> /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1163:12
#61 0x7f7d48ab2c78 in apply<mozilla::dom::Document, void (mozilla::dom::Document::*)()> /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1169:12
#62 0x7f7d48ab2c78 in mozilla::detail::RunnableMethodImpl<mozilla::dom::Document*, void (mozilla::dom::Document::*)(), true, (mozilla::RunnableKind)0>::Run() /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1216:13
#63 0x7f7d46ec6712 in mozilla::SchedulerGroup::Runnable::Run() /builds/worker/checkouts/gecko/xpcom/threads/SchedulerGroup.cpp:114:20
#64 0x7f7d46ed0e45 in mozilla::RunnableTask::Run() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:541:16
#65 0x7f7d46ecbf98 in mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:855:26
#66 0x7f7d46ecab6a in mozilla::TaskController::ExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:686:15
#67 0x7f7d46ecaec5 in mozilla::TaskController::ProcessPendingMTTask(bool) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:464:36
#68 0x7f7d46ed4846 in operator() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:188:37
#69 0x7f7d46ed4846 in mozilla::detail::RunnableFunction<mozilla::TaskController::InitializeInternal()::$_3>::Run() /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:547:5
#70 0x7f7d46eeaa27 in nsThread::ProcessNextEvent(bool, bool*) /builds/worker/checkouts/gecko/xpcom/threads/nsThread.cpp:1239:16
#71 0x7f7d46ef0edd in NS_ProcessNextEvent(nsIThread*, bool) /builds/worker/checkouts/gecko/xpcom/threads/nsThreadUtils.cpp:477:10
#72 0x7f7d47b43963 in mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:85:21
#73 0x7f7d47a65328 in MessageLoop::RunInternal() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:381:10
#74 0x7f7d47a65231 in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:374:3
#75 0x7f7d47a65231 in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:356:3
#76 0x7f7d4c2103e8 in nsBaseAppShell::Run() /builds/worker/checkouts/gecko/widget/nsBaseAppShell.cpp:148:27
#77 0x7f7d4e497eab in XRE_RunAppShell() /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:738:20
#78 0x7f7d47b44829 in mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:235:9
#79 0x7f7d47a65328 in MessageLoop::RunInternal() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:381:10
#80 0x7f7d47a65231 in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:374:3
#81 0x7f7d47a65231 in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:356:3
#82 0x7f7d4e497a08 in XRE_InitChildProcess(int, char**, XREChildData const*) /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:671:34
#83 0x558e254fadf0 in content_process_main /builds/worker/checkouts/gecko/browser/app/../../ipc/contentproc/plugin-container.cpp:57:28
#84 0x558e254fadf0 in main /builds/worker/checkouts/gecko/browser/app/nsBrowserApp.cpp:353:18
#85 0x7f7d5c01dd8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#86 0x7f7d5c01de3f in __libc_start_main csu/../csu/libc-start.c:392:3
#87 0x558e254d1458 in _start (/home/user/workspace/browsers/m-c-20230307160733-fuzzing-debug/firefox-bin+0x5b458) (BuildId: f80f3932367abf2a03fbf513284232a9231bf07f)

Verified bug as reproducible on mozilla-central 20230308040003-9fa6f54ca6d9.
Unable to bisect testcase (Testcase reproduces on start build!):

Start: a65fc42d14c7da18cfad6a9291c719386ef70316 (20220309094444)
End: c8b5160f198372e54bd50afa245877dbde965361 (20230305091344)
BuildFlags: BuildFlags(asan=False, tsan=False, debug=True, fuzzing=True, coverage=False, valgrind=False, no_opt=False, fuzzilli=False, nyx=False)

I don't know how the assertion lines up with the stack here.

Ah, I meant the assertion in comment 0. Tyson, is the assertion in comment 0 a copy paste error or are you seeing it and !mMightHaveUnreportedJSException somehow?

Locally I hit Assertion failure: !mMightHaveUnreportedJSException in a debug build.

(In reply to Andrew McCreight [:mccr8] from comment #3)

Tyson, is the assertion in comment 0 a copy paste error

Yes, fixed, thank you :)

Bugmon was unable reproduce this issue.
Removing bugmon keyword as no further action possible. Please review the bug and re-add the keyword for further analysis.

A change to the Taskcluster build definitions over the weekend caused Bugmon to fail when reproducing issues. This issue has been corrected. Re-enabling bugmon.

Testcase crashes using the initial build (mozilla-central 20231118093245-391181d97b6b) but not with tip (mozilla-central 20241115210754-6c508a387477.)

Unable to bisect testcase (End build crashes!):

Start: 391181d97b6bb5b53fe8a1186c8a1a85971812de (20231118093245)
End: 6c508a387477e3b72db913a9e1761e9a433d06a2 (20241115210754)
BuildFlags: BuildFlags(asan=False, tsan=False, debug=True, fuzzing=True, coverage=False, valgrind=False, no_opt=False, fuzzilli=False, nyx=False)

Removing bugmon keyword as no further action possible. Please review the bug and re-add the keyword for further analysis.