1706771 - Assertion failure: SelectionRef().GetAnchorFocusRange() && SelectionRef().GetAnchorFocusRange()->Collapsed() (Selection not collapsed after delete), at /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditor.cpp:4918

Status: RESOLVED FIXED

(Core :: DOM: Editor, defect, P3)

Description

[Jason Kratzer [:jkratzer]]

Attachment: testcase.html

Testcase found while fuzzing mozilla-central rev 6531d095b2a7 (built with --enable-debug --enable-fuzzing).

Testcase can be reproduced using the following commands:

$ pip install fuzzfetch grizzly-framework
$ python -m fuzzfetch --build 6531d095b2a7 --debug --fuzzing -n mc-debug
$ python -m grizzly.replay --xvfb ./mc-debug/firefox ./testcase.html

Assertion failure: SelectionRef().GetAnchorFocusRange() && SelectionRef().GetAnchorFocusRange()->Collapsed() (Selection not collapsed after delete), at /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditor.cpp:4918

    #0 0x7fb8a2253445 in mozilla::HTMLEditor::DeleteSelectionAndPrepareToCreateNode() /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditor.cpp:4916:5
    #1 0x7fb8a2252418 in mozilla::HTMLEditor::InsertElementAtSelectionAsAction(mozilla::dom::Element*, bool, nsIPrincipal*) /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditor.cpp:1773:19
    #2 0x7fb8a226a6c5 in mozilla::InsertTagCommand::DoCommand(mozilla::Command, mozilla::TextEditor&, nsIPrincipal*) const /builds/worker/checkouts/gecko/editor/libeditor/HTMLEditorCommands.cpp:1241:13
    #3 0x7fb89f674a71 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:5309:37
    #4 0x7fb8a06b8a8d in mozilla::dom::Document_Binding::execCommand(JSContext*, JS::Handle<JSObject*>, void*, JSJitMethodCallArgs const&) /builds/worker/workspace/obj-build/dom/bindings/DocumentBinding.cpp:3477:36
    #5 0x7fb8a0a3be2d 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:3232:13
    #6 0x7fb8a3ac1c60 in CallJSNative(JSContext*, bool (*)(JSContext*, unsigned int, JS::Value*), js::CallReason, JS::CallArgs const&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:437:13
    #7 0x7fb8a3ac13cc in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:522:12
    #8 0x7fb8a3ac2bd9 in InternalCall(JSContext*, js::AnyInvokeArgs const&, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:582:10
    #9 0x7fb8a3ab76e5 in CallFromStack /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:586:10
    #10 0x7fb8a3ab76e5 in Interpret(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:3248:16
    #11 0x7fb8a3aaecd5 in js::RunScript(JSContext*, js::RunState&) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:406:13
    #12 0x7fb8a3ac13e9 in js::InternalCallOrConstruct(JSContext*, JS::CallArgs const&, js::MaybeConstruct, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:554:13
    #13 0x7fb8a3ac2bd9 in InternalCall(JSContext*, js::AnyInvokeArgs const&, js::CallReason) /builds/worker/checkouts/gecko/js/src/vm/Interpreter.cpp:582:10
    #14 0x7fb8a3ac2dff 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:599:8
    #15 0x7fb8a404dceb 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/jsapi.cpp:2830:10
    #16 0x7fb8a068d43c 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:58:8
    #17 0x7fb8a0df40d6 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
    #18 0x7fb8a0df3e1e in mozilla::EventListenerManager::HandleEventSubType(mozilla::EventListenerManager::Listener*, mozilla::dom::Event*, mozilla::dom::EventTarget*) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1108:43
    #19 0x7fb8a0df4aa0 in mozilla::EventListenerManager::HandleEventInternal(nsPresContext*, mozilla::WidgetEvent*, mozilla::dom::Event**, mozilla::dom::EventTarget*, nsEventStatus*, bool) /builds/worker/checkouts/gecko/dom/events/EventListenerManager.cpp:1305:17
    #20 0x7fb8a0de9e15 in HandleEvent /builds/worker/workspace/obj-build/dist/include/mozilla/EventListenerManager.h:390:5
    #21 0x7fb8a0de9e15 in mozilla::EventTargetChainItem::HandleEvent(mozilla::EventChainPostVisitor&, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:354:17
    #22 0x7fb8a0de93c3 in mozilla::EventTargetChainItem::HandleEventTargetChain(nsTArray<mozilla::EventTargetChainItem>&, mozilla::EventChainPostVisitor&, mozilla::EventDispatchingCallback*, mozilla::ELMCreationDetector&) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp:556:16
    #23 0x7fb8a0debfc1 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:1099:11
    #24 0x7fb8a0deea76 in mozilla::EventDispatcher::DispatchDOMEvent(nsISupports*, mozilla::WidgetEvent*, mozilla::dom::Event*, nsPresContext*, nsEventStatus*) /builds/worker/checkouts/gecko/dom/events/EventDispatcher.cpp
    #25 0x7fb89f8071c3 in nsINode::DispatchEvent(mozilla::dom::Event&, mozilla::dom::CallerType, mozilla::ErrorResult&) /builds/worker/checkouts/gecko/dom/base/nsINode.cpp:1331:17
    #26 0x7fb89f5194fa in nsContentUtils::DispatchEvent(mozilla::dom::Document*, nsISupports*, nsTSubstring<char16_t> const&, mozilla::CanBubble, mozilla::Cancelable, mozilla::Composed, mozilla::Trusted, bool*, mozilla::ChromeOnlyDispatch) /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:4183:28
    #27 0x7fb89f519386 in nsContentUtils::DispatchTrustedEvent(mozilla::dom::Document*, nsISupports*, nsTSubstring<char16_t> const&, mozilla::CanBubble, mozilla::Cancelable, mozilla::Composed, bool*) /builds/worker/checkouts/gecko/dom/base/nsContentUtils.cpp:4153:10
    #28 0x7fb89f680ee3 in mozilla::dom::Document::DispatchContentLoadedEvents() /builds/worker/checkouts/gecko/dom/base/Document.cpp:7684:3
    #29 0x7fb89f6f3d66 in applyImpl<mozilla::dom::Document, void (mozilla::dom::Document::*)()> /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1148:12
    #30 0x7fb89f6f3d66 in apply<mozilla::dom::Document, void (mozilla::dom::Document::*)()> /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:1154:12
    #31 0x7fb89f6f3d66 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:1201:13
    #32 0x7fb89da6fe02 in mozilla::SchedulerGroup::Runnable::Run() /builds/worker/checkouts/gecko/xpcom/threads/SchedulerGroup.cpp:143:20
    #33 0x7fb89da9b303 in mozilla::RunnableTask::Run() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:473:16
    #34 0x7fb89da78af9 in mozilla::TaskController::DoExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:757:26
    #35 0x7fb89da77a64 in mozilla::TaskController::ExecuteNextTaskOnlyMainThreadInternal(mozilla::detail::BaseAutoLock<mozilla::Mutex&> const&) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:612:15
    #36 0x7fb89da77bf3 in mozilla::TaskController::ProcessPendingMTTask(bool) /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:396:36
    #37 0x7fb89da9ec26 in operator() /builds/worker/checkouts/gecko/xpcom/threads/TaskController.cpp:135:37
    #38 0x7fb89da9ec26 in mozilla::detail::RunnableFunction<mozilla::TaskController::InitializeInternal()::$_0>::Run() /builds/worker/workspace/obj-build/dist/include/nsThreadUtils.h:534:5
    #39 0x7fb89da8a920 in nsThread::ProcessNextEvent(bool, bool*) /builds/worker/checkouts/gecko/xpcom/threads/nsThread.cpp:1159:16
    #40 0x7fb89da9161a in NS_ProcessNextEvent(nsIThread*, bool) /builds/worker/checkouts/gecko/xpcom/threads/nsThreadUtils.cpp:548:10
    #41 0x7fb89e3cae76 in mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:87:21
    #42 0x7fb89e3358e3 in MessageLoop::RunInternal() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:335:10
    #43 0x7fb89e3357fd in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:328:3
    #44 0x7fb89e3357fd in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:310:3
    #45 0x7fb8a210c268 in nsBaseAppShell::Run() /builds/worker/checkouts/gecko/widget/nsBaseAppShell.cpp:137:27
    #46 0x7fb8a398d4a3 in XRE_RunAppShell() /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:906:20
    #47 0x7fb89e3cbd5c in mozilla::ipc::MessagePumpForChildProcess::Run(base::MessagePump::Delegate*) /builds/worker/checkouts/gecko/ipc/glue/MessagePump.cpp:237:9
    #48 0x7fb89e3358e3 in MessageLoop::RunInternal() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:335:10
    #49 0x7fb89e3357fd in RunHandler /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:328:3
    #50 0x7fb89e3357fd in MessageLoop::Run() /builds/worker/checkouts/gecko/ipc/chromium/src/base/message_loop.cc:310:3
    #51 0x7fb8a398d07f in XRE_InitChildProcess(int, char**, XREChildData const*) /builds/worker/checkouts/gecko/toolkit/xre/nsEmbedFunctions.cpp:738:34
    #52 0x562440ca9396 in content_process_main /builds/worker/checkouts/gecko/browser/app/../../ipc/contentproc/plugin-container.cpp:57:28
    #53 0x562440ca9396 in main /builds/worker/checkouts/gecko/browser/app/nsBrowserApp.cpp:309:18
    #54 0x7fb8b1e300b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16

Comment 1

[Bugmon [:jkratzer for issues]]

Bugmon Analysis:
Verified bug as reproducible on mozilla-central 20210421212740-683c2a81d1a3.
The bug appears to have been introduced in the following build range:

Start: 8803bc71047a75f0983844d891d82b4a5edecda4 (20210310041823)
End: 10ca32d83c66663d73c0600ff90022e85f52b92b (20210310054241)
Pushlog: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=8803bc71047a75f0983844d891d82b4a5edecda4&tochange=10ca32d83c66663d73c0600ff90022e85f52b92b

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

The regression range has some editor changes.

Comment 3

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

It must be easy to fix.

Comment 4

[Bugmon [:jkratzer for issues]]

Testcase crashes using the initial build (mozilla-central 20211106093208-0283aba1bf20) but not with tip (mozilla-central 20221104160427-510fd2811bcd.)

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

Start: f5e4af37bbb013157665ec9329bc7fb3032666fa (20221021083918)
End: f4b1fb8a71dd45e7a37d4ca764a910f1f7c0cbe7 (20221021091352)
Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=f5e4af37bbb013157665ec9329bc7fb3032666fa&tochange=f4b1fb8a71dd45e7a37d4ca764a910f1f7c0cbe7

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 5

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

Ah, yes, bug 1699256 should have fixed this. I'll add the testcase into the tree.

Comment 6

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

Attachment: Bug 1706771 - Add reported test case r=m_kato!

It's already fixed in bug 1699256 as making the deletion always collapse
Selection before inserting new element.

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/ea0b69098dc9
Add reported test case r=m_kato

Comment 8

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Created web-platform-tests PR https://github.com/web-platform-tests/wpt/pull/36879 for changes under testing/web-platform/tests

Comment 9

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/ea0b69098dc9

Comment 10

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Upstream PR merged by moz-wptsync-bot