Bug 237541

Summary:	[ iOS Debug ] ASSERTION FAILED: Attempt to access post layout data before receiving it on editing/editable-region/fixed-and-absolute-contenteditable-scrolled.html
Product:	WebKit	Reporter:	Dawn Morningstar <Morningstar>
Component:	Layout and Rendering	Assignee:	Wenson Hsieh <wenson_hsieh>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	bfulgham, megan_gardner, simon.fraser, webkit-bot-watchers-bugzilla, webkit-bug-importer, wenson_hsieh, zalan
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Dawn Morningstar 2022-03-07 11:10:55 PST

editing/editable-region/fixed-and-absolute-contenteditable-scrolled.html
Is a flaky Assertion Failure on iOS Debug queues.

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=editing%2Feditable-region%2Ffixed-and-absolute-contenteditable-scrolled.html

CRASH-LOG:
No crash log found for WebKitTestRunnerApp:55783.

stderr:
ASSERTION FAILED: Attempt to access post layout data before receiving it
!isMissingPostLayoutData
/Volumes/Data/worker/ios-simulator-15-debug/build/Source/WebKit/Shared/EditorState.h(170) : const WebKit::EditorState::PostLayoutData &WebKit::EditorState::postLayoutData() const
1   0x11a0d8749 WTFCrash
2   0x138a01b9f WebKit::EditorState::postLayoutData() const
3   0x13a52c18e -[WKContentView(WKInteraction) _characterInRelationToCaretSelection:]
4   0x1306a28b6 -[UIKeyboardImpl nextCharacterIsWordCharacter]
5   0x1306a0dd6 -[UIKeyboardImpl didAcceptAutocorrection:wordTerminator:]
6   0x1306a09ba __99-[UIKeyboardImpl acceptAutocorrectionForWordTerminator:executionContextPassingTIKeyboardCandidate:]_block_invoke
7   0x1306ca085 -[UIKeyboardTaskExecutionContext returnExecutionToParentWithInfo:]
8   0x1306a1971 -[UIKeyboardImpl acceptAutocorrection:executionContextPassingTIKeyboardCandidate:]
9   0x1306a08f1 -[UIKeyboardImpl acceptAutocorrectionForWordTerminator:executionContextPassingTIKeyboardCandidate:]
10  0x1306a0789 __56-[UIKeyboardImpl acceptAutocorrectionForWordTerminator:]_block_invoke
11  0x1306cb8bb -[UIKeyboardTaskEntry execute:]
12  0x1306ca55d -[UIKeyboardTaskQueue continueExecutionOnMainThread]
13  0x1306ca841 -[UIKeyboardTaskQueue performTaskOnMainThread:waitUntilDone:]
14  0x1306a06d0 -[UIKeyboardImpl acceptAutocorrectionForWordTerminator:]
15  0x1306a3a1e -[UIKeyboardImpl acceptAutocorrection]
16  0x1306a3c5d __38-[UIKeyboardImpl acceptAutocorrection]_block_invoke
17  0x1306cb8bb -[UIKeyboardTaskEntry execute:]
18  0x1306ca55d -[UIKeyboardTaskQueue continueExecutionOnMainThread]
19  0x1306a3c0e -[UIKeyboardImpl acceptAutocorrection]
20  0x1306870d7 -[UIKeyboardImpl setDelegate:force:]
21  0x13028dcce -[UIKeyboardSceneDelegate _reloadInputViewsForKeyWindowSceneResponder:]
22  0x13028d44d -[UIKeyboardSceneDelegate _reloadInputViewsForResponder:]
23  0x130916d0d -[UIResponder(UIResponderInputViewAdditions) reloadInputViews]
24  0x13a534783 -[WKContentView(WKInteraction) _hideKeyboard]
25  0x13a5364d8 -[WKContentView(WKInteraction) _elementDidBlur]
26  0x139054919 WebKit::PageClientImpl::elementDidBlur()
27  0x1390ca3c5 WebKit::WebPageProxy::elementDidBlur()
28  0x13a1c7b2b void IPC::callMemberFunctionImpl<WebKit::WebPageProxy, void (WebKit::WebPageProxy::*)(), std::__1::tuple<> >(WebKit::WebPageProxy*, void (WebKit::WebPageProxy::*)(), std::__1::tuple<>&&, std::__1::integer_sequence<unsigned long>)
29  0x13a1c7a1d void IPC::callMemberFunction<WebKit::WebPageProxy, void (WebKit::WebPageProxy::*)(), std::__1::tuple<>, std::__1::integer_sequence<unsigned long> >(std::__1::tuple<>&&, WebKit::WebPageProxy*, void (WebKit::WebPageProxy::*)())
30  0x13a1972d0 void IPC::handleMessage<Messages::WebPageProxy::ElementDidBlur, WebKit::WebPageProxy, void (WebKit::WebPageProxy::*)()>(IPC::Connection&, IPC::Decoder&, WebKit::WebPageProxy*, void (WebKit::WebPageProxy::*)())
31  0x13a18b56b WebKit::WebPageProxy::didReceiveMessage(IPC::Connection&, IPC::Decoder&)

CRASH-URL:
https://build.webkit.org/results/Apple-iPadOS-15-Simulator-Debug-WK2-Tests/r290882%20(1162)/editing/editable-region/fixed-and-absolute-contenteditable-scrolled-crash-log.txt

Comment 1 Dawn Morningstar 2022-03-07 11:12:25 PST

Regression point appears to be around r289876 further investigation is required.

Comment 2 Radar WebKit Bug Importer 2022-03-07 11:12:47 PST

<rdar://problem/89918871>

Comment 3 Wenson Hsieh 2022-06-09 12:10:48 PDT

Pull request: https://github.com/WebKit/WebKit/pull/1425

Comment 4 EWS 2022-06-09 17:15:14 PDT

Committed r295441 (251447@main): <https://commits.webkit.org/251447@main>

Reviewed commits have been landed. Closing PR #1425 and removing active labels.