1884281 - Assertion failure: mStart.EqualsOrIsBefore(mEnd), at /builds/worker/workspace/obj-build/dist/include/mozilla/EditorDOMPoint.h:1290

Status: RESOLVED FIXED

(Core :: DOM: Editor, defect)

Description

[Tyson Smith [:tsmith]]

Attachment: testcase.html

Found while fuzzing m-c 20240118-9c0c2aaab123 (--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.bugzilla ./firefox/firefox <bugid>

Assertion failure: mStart.EqualsOrIsBefore(mEnd), at /builds/worker/workspace/obj-build/dist/include/mozilla/EditorDOMPoint.h:1290

#0 0x7f6ca73559a3 in mozilla::EditorDOMRangeBase<mozilla::EditorDOMPointBase<nsCOMPtr<nsINode>, nsCOMPtr<nsIContent>>>::EditorDOMRangeBase(mozilla::EditorDOMPointBase<nsCOMPtr<nsINode>, nsCOMPtr<nsIContent>>&&, mozilla::EditorDOMPointBase<nsCOMPtr<nsINode>, nsCOMPtr<nsIContent>>&&) /builds/worker/workspace/obj-build/dist/include/mozilla/EditorDOMPoint.h:1289:5
#1 0x7f6ca735372b in mozilla::WhiteSpaceVisibilityKeeper::MergeFirstLineOfRightBlockElementIntoLeftBlockElement(mozilla::HTMLEditor&, mozilla::dom::Element&, mozilla::dom::Element&, mozilla::Maybe<nsAtom*> const&, mozilla::dom::HTMLBRElement const*, mozilla::dom::Element const&) /builds/worker/checkouts/gecko/editor/libeditor/WSRunObject.cpp:695:17
#2 0x7f6ca72c25d9 in mozilla::HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::AutoInclusiveAncestorBlockElementsJoiner::Run(mozilla::HTMLEditor&, mozilla::dom::Element const&) /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditorDeleteHandler.cpp:5071:14
#3 0x7f6ca72cd025 in mozilla::HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::HandleDeleteNonCollapsedRanges(mozilla::HTMLEditor&, short, short, mozilla::AutoRangeArray&, mozilla::HTMLEditor::AutoDeleteRangesHandler::SelectionWasCollapsed, mozilla::dom::Element const&) /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditorDeleteHandler.cpp:4002:16
#4 0x7f6ca72c752a in mozilla::HTMLEditor::AutoDeleteRangesHandler::AutoBlockElementsJoiner::Run(mozilla::HTMLEditor&, short, short, mozilla::AutoRangeArray&, mozilla::HTMLEditor::AutoDeleteRangesHandler::SelectionWasCollapsed, mozilla::dom::Element const&) /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditorDeleteHandler.cpp:658:15
#5 0x7f6ca72b8e64 in mozilla::HTMLEditor::AutoDeleteRangesHandler::HandleDeleteNonCollapsedRanges(mozilla::HTMLEditor&, short, short, mozilla::AutoRangeArray&, mozilla::HTMLEditor::AutoDeleteRangesHandler::SelectionWasCollapsed, mozilla::dom::Element const&) /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditorDeleteHandler.cpp:3359:14
#6 0x7f6ca72b310e in mozilla::HTMLEditor::AutoDeleteRangesHandler::Run(mozilla::HTMLEditor&, short, short, mozilla::AutoRangeArray&, mozilla::dom::Element const&) /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditorDeleteHandler.cpp:1712:47
#7 0x7f6ca72b2aaa in mozilla::HTMLEditor::HandleDeleteSelection(short, short) /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditorDeleteHandler.cpp:1169:61
#8 0x7f6ca71dc5bc in mozilla::EditorBase::DeleteSelectionAsSubAction(short, short) /builds/worker/checkouts/gecko/editor/libeditor/EditorBase.cpp:4443:9
#9 0x7f6ca71d6b76 in mozilla::EditorBase::DeleteSelectionAsAction(short, short, nsIPrincipal*) /builds/worker/checkouts/gecko/editor/libeditor/EditorBase.cpp:4406:8
#10 0x7f6ca71f6618 in mozilla::DeleteCommand::DoCommand(mozilla::Command, mozilla::EditorBase&, nsIPrincipal*) const /builds/worker/checkouts/gecko/editor/libeditor/EditorCommands.cpp:623:29
#11 0x7f6ca375a01f in mozilla::dom::Document::ExecCommand(nsTSubstring<char16_t> const&, bool, nsTSubstring<char16_t> const&, nsIPrincipal&, mozilla::ErrorResult&) /builds/worker/checkouts/gecko/dom/base/Document.cpp:5485:37
#12 0x7f6ca4977431 in mozilla::dom::Document_Binding::execCommand(JSContext*, JS::Handle<JSObject*>, void*, JSJitMethodCallArgs const&) /builds/worker/workspace/obj-build/dom/bindings/./DocumentBinding.cpp:4042:36
#13 0x7f6ca4c96dbe 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:3258:13
#14 0x7f6ca91df194 in CallJSNative(JSContext*, bool (*)(JSContext*, unsigned int, JS::Value*), js::CallReason, JS::CallArgs const&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:479:13
#15 0x7f6ca91deaeb in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:573:12
#16 0x7f6ca91ee408 in CallFromStack /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:645:10
#17 0x7f6ca91ee408 in js::Interpret(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:3060:16
#18 0x7f6ca91de072 in js::RunScript(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:451:13
#19 0x7f6ca91deb08 in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:605:13
#20 0x7f6ca91dfdbd 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:672:8
#21 0x7f6ca92fc984 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:119:10
#22 0x7f6ca49d5e6b 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
#23 0x7f6ca532b189 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
#24 0x7f6ca532a257 in mozilla::JSEventHandler::HandleEvent(mozilla::dom::Event*) /builds/worker/checkouts/gecko/dom/events/JSEventHandler.cpp:199:12
#25 0x7f6ca53069f5 in mozilla::EventListenerManager::HandleEventSingleListener(mozilla::EventListenerManager::Listener*, nsAtom*, mozilla::WidgetEvent*, mozilla::dom::Event*, mozilla::dom::EventTarget*, bool) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1346:22
#26 0x7f6ca5307af4 in mozilla::EventListenerManager::HandleEventWithListenerArray(mozilla::EventListenerManager::ListenerArray*, nsAtom*, mozilla::EventMessage, nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event**, mozilla::dom::EventTarget*, bool) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1661:12
#27 0x7f6ca5307369 in mozilla::EventListenerManager::HandleEventInternal(nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event**, mozilla::dom::EventTarget*, nsEventStatus*, bool) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1558:35
#28 0x7f6ca52fa9bf in HandleEvent /builds/worker/workspace/obj-build/dist/include/mozilla/EventListenerManager.h:465:5
#29 0x7f6ca52fa9bf in mozilla::EventTargetChainItem::HandleEvent(mozilla::EventChainPostVisitor&, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:364:17
#30 0x7f6ca52f9f71 in mozilla::EventTargetChainItem::HandleEventTargetChain(nsTArray<mozilla::EventTargetChainItem>&, mozilla::EventChainPostVisitor&, mozilla::EventDispatchingCallback*, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:605:16
#31 0x7f6ca52fc976 in mozilla::EventDispatcher::Dispatch(mozilla::dom::EventTarget*, nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event*, nsEventStatus*, mozilla::EventDispatchingCallback*, nsTArray<mozilla::dom::EventTarget*>*) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:1222:11
#32 0x7f6ca52ffe46 in mozilla::EventDispatcher::DispatchDOMEvent(mozilla::dom::EventTarget*, mozilla::WidgetEvent*, mozilla::dom::Event*, nsPresContext*, nsEventStatus*) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp
#33 0x7f6ca3a1ccc9 in nsINode::DispatchEvent(mozilla::dom::Event&, mozilla::dom::CallerType, mozilla::ErrorResult&) /builds/worker/checkouts/gecko/dom/base/nsINode.cpp:1407:17
#34 0x7f6ca4a3d1aa in mozilla::dom::EventTarget_Binding::dispatchEvent(JSContext*, JS::Handle<JSObject*>, void*, JSJitMethodCallArgs const&) /builds/worker/workspace/obj-build/dom/bindings/./EventTargetBinding.cpp:1104:36
#35 0x7f6ca4c986ca in bool mozilla::dom::binding_detail::GenericMethod<mozilla::dom::binding_detail::MaybeCrossOriginObjectThisPolicy, mozilla::dom::binding_detail::ThrowExceptions>(JSContext*, unsigned int, JS::Value*) /builds/worker/checkouts/gecko/dom/bindings/BindingUtils.cpp:3258:13
#36 0x7f6ca91df194 in CallJSNative(JSContext*, bool (*)(JSContext*, unsigned int, JS::Value*), js::CallReason, JS::CallArgs const&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:479:13
#37 0x7f6ca91deaeb in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:573:12
#38 0x7f6ca91ee408 in CallFromStack /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:645:10
#39 0x7f6ca91ee408 in js::Interpret(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:3060:16
#40 0x7f6ca91de072 in js::RunScript(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:451:13
#41 0x7f6ca91deb08 in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:605:13
#42 0x7f6ca91dfdbd 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:672:8
#43 0x7f6ca92fc984 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:119:10
#44 0x7f6ca49d917c 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
#45 0x7f6ca5306df6 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
#46 0x7f6ca53069b2 in mozilla::EventListenerManager::HandleEventSingleListener(mozilla::EventListenerManager::Listener*, nsAtom*, mozilla::WidgetEvent*, mozilla::dom::Event*, mozilla::dom::EventTarget*, bool) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1340:43
#47 0x7f6ca5307af4 in mozilla::EventListenerManager::HandleEventWithListenerArray(mozilla::EventListenerManager::ListenerArray*, nsAtom*, mozilla::EventMessage, nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event**, mozilla::dom::EventTarget*, bool) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1661:12
#48 0x7f6ca5307369 in mozilla::EventListenerManager::HandleEventInternal(nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event**, mozilla::dom::EventTarget*, nsEventStatus*, bool) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1558:35
#49 0x7f6ca52fa9bf in HandleEvent /builds/worker/workspace/obj-build/dist/include/mozilla/EventListenerManager.h:465:5
#50 0x7f6ca52fa9bf in mozilla::EventTargetChainItem::HandleEvent(mozilla::EventChainPostVisitor&, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:364:17
#51 0x7f6ca52f9f71 in mozilla::EventTargetChainItem::HandleEventTargetChain(nsTArray<mozilla::EventTargetChainItem>&, mozilla::EventChainPostVisitor&, mozilla::EventDispatchingCallback*, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:605:16
#52 0x7f6ca52fc976 in mozilla::EventDispatcher::Dispatch(mozilla::dom::EventTarget*, nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event*, nsEventStatus*, mozilla::EventDispatchingCallback*, nsTArray<mozilla::dom::EventTarget*>*) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:1222:11
#53 0x7f6ca7538c7e in nsDocumentViewer::LoadComplete(nsresult) /builds/worker/checkouts/gecko/layout/base/nsDocumentViewer.cpp:1028:7
#54 0x7f6ca87aab35 in nsDocShell::EndPageLoad(nsIWebProgress*, nsIChannel*, nsresult) /builds/worker/checkouts/gecko/docshell/base/nsDocShell.cpp:6302:13
#55 0x7f6ca87a9eab in nsDocShell::OnStateChange(nsIWebProgress*, nsIRequest*, unsigned int, nsresult) /builds/worker/checkouts/gecko/docshell/base/nsDocShell.cpp:5694:7
#56 0x7f6ca87abc86 in non-virtual thunk to nsDocShell::OnStateChange(nsIWebProgress*, nsIRequest*, unsigned int, nsresult) /builds/worker/checkouts/gecko/docshell/base/nsDocShell.cpp
#57 0x7f6ca2b4b0b9 in nsDocLoader::DoFireOnStateChange(nsIWebProgress*, nsIRequest*, int&, nsresult) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:1356:3
#58 0x7f6ca2b4a632 in nsDocLoader::doStopDocumentLoad(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:962:14
#59 0x7f6ca2b4887b in nsDocLoader::DocLoaderIsEmpty(bool, mozilla::Maybe<nsresult> const&) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:784:9
#60 0x7f6ca2b49ae1 in nsDocLoader::OnStopRequest(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/uriloader/base/nsDocLoader.cpp:667:5
#61 0x7f6ca87e2bbf in nsDocShell::OnStopRequest(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/docshell/base/nsDocShell.cpp:13753:23
#62 0x7f6ca1d42b3f in mozilla::net::nsLoadGroup::NotifyRemovalObservers(nsIRequest*, nsresult) /builds/worker/checkouts/gecko/netwerk/base/nsLoadGroup.cpp:632:22
#63 0x7f6ca1d44080 in mozilla::net::nsLoadGroup::RemoveRequest(nsIRequest*, nsISupports*, nsresult) /builds/worker/checkouts/gecko/netwerk/base/nsLoadGroup.cpp:536:10
#64 0x7f6ca378778c in mozilla::dom::Document::DoUnblockOnload() /builds/worker/checkouts/gecko/dom/base/Document.cpp:11715:18
#65 0x7f6ca376d746 in mozilla::dom::Document::DispatchContentLoadedEvents() /builds/worker/checkouts/gecko/dom/base/Document.cpp:8141:3
#66 0x7f6ca3822e39 in operator()<> /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1085:18
#67 0x7f6ca3822e39 in __invoke_impl<void, (lambda at /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1084:9)> /builds/worker/fetches/sysroot-x86_64-linux-gnu/usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/invoke.h:60:14
#68 0x7f6ca3822e39 in __invoke<(lambda at /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1084:9)> /builds/worker/fetches/sysroot-x86_64-linux-gnu/usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/bits/invoke.h:95:14
#69 0x7f6ca3822e39 in __apply_impl<(lambda at /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1084:9), std::tuple<> &> /builds/worker/fetches/sysroot-x86_64-linux-gnu/usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/tuple:1678:14
#70 0x7f6ca3822e39 in apply<(lambda at /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1084:9), std::tuple<> &> /builds/worker/fetches/sysroot-x86_64-linux-gnu/usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/tuple:1687:14
#71 0x7f6ca3822e39 in apply<mozilla::dom::Document, void (mozilla::dom::Document::*)()> /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1083:12
#72 0x7f6ca3822e39 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:1134:13
#73 0x7f6ca1aff937 in mozilla::RunnableTask::Run() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:578:16
#74 0x7f6ca1af50a6 in mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:905:26
#75 0x7f6ca1af3887 in mozilla::TaskController::ExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:728:15
#76 0x7f6ca1af3d05 in mozilla::TaskController::ProcessPendingMTTask(bool) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:514:36
#77 0x7f6ca1b038d6 in operator() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:232:37
#78 0x7f6ca1b038d6 in mozilla::detail::RunnableFunction<mozilla::TaskController::TaskController()::$_0>::Run() /builds/worker/checkouts/gecko/xpcom/threads/nsThreadUtils.h:548:5
#79 0x7f6ca1b18bb2 in nsThread::ProcessNextEvent(bool, bool*) /builds/worker/checkouts/gecko/xpcom/threads/nsThread.cpp:1199:16
#80 0x7f6ca1b1fcfd in NS_ProcessNextEvent(nsIThread*, bool) /builds/worker/checkouts/gecko/xpcom/threads/nsThreadUtils.cpp:480:10
#81 0x7f6ca2806b95 in mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:85:21
#82 0x7f6ca271cf41 in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:363:3
#83 0x7f6ca271cf41 in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:345:3
#84 0x7f6ca70adaf8 in nsBaseAppShell::Run() /builds/worker/checkouts/gecko/widget/nsBaseAppShell.cpp:148:27
#85 0x7f6ca71704a8 in nsAppShell::Run() /builds/worker/checkouts/gecko/widget/gtk/nsAppShell.cpp:470:33
#86 0x7f6ca8fab2fb in XRE_RunAppShell() /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:712:20
#87 0x7f6ca2807a76 in mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:235:9
#88 0x7f6ca271cf41 in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:363:3
#89 0x7f6ca271cf41 in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:345:3
#90 0x7f6ca8faab62 in XRE_InitChildProcess(int, char**, XREChildData const*) /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:647:34
#91 0x561fe8b573f6 in content_process_main /builds/worker/checkouts/gecko/browser/app/../../ipc/contentproc/plugin-container.cpp:57:28
#92 0x561fe8b573f6 in main /builds/worker/checkouts/gecko/browser/app/nsBrowserApp.cpp:375:18
#93 0x7f6cb6629d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#94 0x7f6cb6629e3f in __libc_start_main csu/../csu/libc-start.c:392:3
#95 0x561fe8b2d128 in _start (/home/user/workspace/browsers/m-c-20240307095557-fuzzing-debug/firefox-bin+0x59128) (BuildId: 1f2104c8145a4d90a64c47faf0eee764baaf47e7)

Comment 1

[Bugmon [:jkratzer for issues]]

Verified bug as reproducible on mozilla-central 20240308044528-ac5529a784bd.
The bug appears to have been introduced in the following build range:

Start: 583cfd323dab818e35dc1f15fa3e92a503e56e11 (20230927023537)
End: 82ae09837aed66d319e3280febbf971a401bd8a6 (20230927062331)
Pushlog: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=583cfd323dab818e35dc1f15fa3e92a503e56e11&tochange=82ae09837aed66d319e3280febbf971a401bd8a6

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1851951

Comment 3

[Bugmon [:jkratzer for issues]]

Testcase crashes using the initial build (mozilla-central 20240118213414-9c0c2aaab123) but not with tip (mozilla-central 20240406085330-a1630c7af1b6.)

The bug appears to have been fixed in the following build range:

Start: 26f475fb8d5ae5cb0b3bd5fb9d77aa7fc2df2665 (20240403191719)
End: 9455e560433a94b062454fc7abe5d8f01f693743 (20240403191851)
Pushlog: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=26f475fb8d5ae5cb0b3bd5fb9d77aa7fc2df2665&tochange=9455e560433a94b062454fc7abe5d8f01f693743

masayuki, can you confirm that the above bisection range is responsible for fixing this issue?
Removing bugmon keyword as no further action possible. Please review the bug and re-add the keyword for further analysis.

Comment 4

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

window.addEventListener('DOMContentLoaded', () => {
  d.onstart = func_0
})

d is the <marquee>, and the fix of bug 1851951 makes <marquee> won't fire its specific events. Therefore, func_0 never runs in the test. However, the stack detected an editor bug. Therefore, the fix must just hide the root cause.

tsmith: Do you want to try to change the test working without the <marquee> specific event?

Comment 5

[Tyson Smith [:tsmith]]

Let's call it fixed then. The fuzzers have only reported two test cases and neither reproduce now.

Comment 6

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Thank you!