Bug 302196 – RELEASE_ASSERT under ClipboardItemBindingsDataSource::ClipboardItemTypeLoader::didResolveToBlob()

• Component: WebCore Misc.
• Status: RESOLVED FIXED

[Chris Dumez]

RELEASE_ASSERT under ClipboardItemBindingsDataSource::ClipboardItemTypeLoader::didResolveToBlob():
```
Thread 0 Crashed::  Dispatch queue: com.apple.main-thread:
0   WebCore                       	       0x1a7fed740 WTFCrashWithInfo(int, char const*, char const*, int) + 24 (/AppleInternal/Library/BuildRoots/4~CBNbugAVY4NwvDu7UBvAZ9iu0ihsUlcRUqB01_o/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.2.Internal.sdk/usr/local/include/wtf/Assertions.h:969) [inlined]
1   WebCore                       	       0x1a7fed740 WTF::CanMakeCheckedPtrBase<std::__1::atomic<unsigned int>, unsigned int>::decrementCheckedPtrCount() const + 24 (/AppleInternal/Library/BuildRoots/4~CBNbugAVY4NwvDu7UBvAZ9iu0ihsUlcRUqB01_o/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.2.Internal.sdk/usr/local/include/wtf/CheckedRef.h:294) [inlined]
2   WebCore                       	       0x1a7fed740 WTF::CheckedRef<WebCore::FileReaderLoader, WTF::RawPtrTraits<WebCore::FileReaderLoader>>::~CheckedRef() + 24 (/AppleInternal/Library/BuildRoots/4~CBNbugAVY4NwvDu7UBvAZ9iu0ihsUlcRUqB01_o/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.2.Internal.sdk/usr/local/include/wtf/CheckedRef.h:56) [inlined]
3   WebCore                       	       0x1a7fed740 WTF::CheckedRef<WebCore::FileReaderLoader, WTF::RawPtrTraits<WebCore::FileReaderLoader>>::~CheckedRef() + 24 (/AppleInternal/Library/BuildRoots/4~CBNbugAVY4NwvDu7UBvAZ9iu0ihsUlcRUqB01_o/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.2.Internal.sdk/usr/local/include/wtf/CheckedRef.h:53) [inlined]
4   WebCore                       	       0x1a7fed740 WebCore::ClipboardItemBindingsDataSource::ClipboardItemTypeLoader::didResolveToBlob(WebCore::ScriptExecutionContext&, WTF::Ref<WebCore::Blob, WTF::RawPtrTraits<WebCore::Blob>, WTF::DefaultRefDerefTraits<WebCore::Blob>>&&) + 120 (/Library/Caches/com.apple.xbs/Sources/WebCore/Source/WebCore/Modules/async-clipboard/ClipboardItemBindingsDataSource.cpp:351) [inlined]
5   WebCore                       	       0x1a7fed740 _ZZZN7WebCore31ClipboardItemBindingsDataSource21collectDataForWritingERNS_9ClipboardEON3WTF17CompletionHandlerIFvNSt3__18optionalINS_20PasteboardCustomDataEEEEEEENK3$_0clIKNS3_12KeyValuePairINS3_6StringENS3_3RefINS_10DOMPromiseENS3_12RawPtrTraitsISH_EENS3_21DefaultRefDerefTraitsISH_EEEEEEEEDaRT_ENUlvE0_clEv + 1032 (/Library/Caches/com.apple.xbs/Sources/WebCore/Source/WebCore/Modules/async-clipboard/ClipboardItemBindingsDataSource.cpp:192) [inlined]
6   WebCore                       	       0x1a7fed740 _ZN3WTF6Detail15CallableWrapperIZZN7WebCore31ClipboardItemBindingsDataSource21collectDataForWritingERNS2_9ClipboardEONS_17CompletionHandlerIFvNSt3__18optionalINS2_20PasteboardCustomDataEEEEEEENK3$_0clIKNS_12KeyValuePairINS_6StringENS_3RefINS2_10DOMPromiseENS_12RawPtrTraitsISJ_EENS_21DefaultRefDerefTraitsISJ_EEEEEEEEDaRT_EUlvE0_vJEE4callEv + 1688 (/AppleInternal/Library/BuildRoots/4~CBNbugAVY4NwvDu7UBvAZ9iu0ihsUlcRUqB01_o/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.2.Internal.sdk/usr/local/include/wtf/Function.h:53)
7   WebCore                       	       0x1a856c75c WTF::Function<void ()>::operator()() const + 36 (/AppleInternal/Library/BuildRoots/4~CBNbugAVY4NwvDu7UBvAZ9iu0ihsUlcRUqB01_o/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.2.Internal.sdk/usr/local/include/wtf/Function.h:82) [inlined]
8   WebCore                       	       0x1a856c75c WebCore::DOMPromise::whenPromiseIsSettled(WebCore::JSDOMGlobalObject*, JSC::JSPromise*, WTF::Function<void ()>&&)::$_0::operator()(JSC::JSGlobalObject*, JSC::CallFrame*) + 36 (/Library/Caches/com.apple.xbs/Sources/WebCore/Source/WebCore/bindings/js/JSDOMPromise.cpp:52) [inlined]
```

[Chris Dumez]

<rdar://164271413>

[Chris Dumez]

Pull request: https://github.com/WebKit/WebKit/pull/53624

[EWS]

Committed 302772@main (5d7cc5b2e05d): <https://commits.webkit.org/302772@main>

Reviewed commits have been landed. Closing PR #53624 and removing active labels.