Bug 261824

Summary:	Regression(268146@main) inspector/css/stylesheet-events-imports.html is flakily crashing
Product:	WebKit	Reporter:	Chris Dumez <cdumez>
Component:	CSS	Assignee:	Chris Dumez <cdumez>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	simon.fraser, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Description Chris Dumez 2023-09-20 08:53:33 PDT

inspector/css/stylesheet-events-imports.html is flakily crashing since 268146@main:
```
 Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0  com.apple.WebCore       	       0x187fd6472    WTFCrashWithInfo(int, char const*, char const*, int)
1  com.apple.WebCore       	       0x18945b2c8    WebCore::EventTarget::~EventTarget()
2  com.apple.WebCore       	       0x18964ae7e    WebCore::HTMLLinkElement::~HTMLLinkElement()
3  com.apple.JavaScriptCore	       0x180d08116    JSC::PreciseAllocation::sweep()
4  com.apple.JavaScriptCore	       0x180cff61a    JSC::MarkedSpace::sweepPreciseAllocations()
5  com.apple.JavaScriptCore	       0x180cc4c74    JSC::Heap::finalize()
```

Comment 1 Chris Dumez 2023-09-20 08:57:28 PDT

Easy repro with:
run-webkit-tests --debug --no-build --repeat-each=30 inspector/css/stylesheet-events-basic.html

Comment 2 Chris Dumez 2023-09-20 08:57:50 PDT

Seems to be caused by the changes to CSSStyleSheet.h

Comment 3 Chris Dumez 2023-09-20 09:09:02 PDT

Pull request: https://github.com/WebKit/WebKit/pull/17973

Comment 4 EWS 2023-09-20 10:33:37 PDT

Committed 268209@main (c943ba34a565): <https://commits.webkit.org/268209@main>

Reviewed commits have been landed. Closing PR #17973 and removing active labels.

Comment 5 Radar WebKit Bug Importer 2023-09-20 10:34:22 PDT

<rdar://problem/115792174>