Bug 303963 – Regression(303516@main) Crash under CachedFontLoadRequest::fontLoaded

• Status: RESOLVED
• Resolution: FIXED
• Component: Text

[Chris Dumez]

Crash under CachedFontLoadRequest::fontLoaded:
```
9 WTFCrashWithInfo(int, char const*, char const*, int) (WebCore)
          9 WTF::CanMakeCheckedPtrBase<WTF::SingleThreadIntegralWrapper<unsigned int>, unsigned int, bool, (WTF::CheckedPtrDeleteCheckException)0>::decrementCheckedPtrCount() const (WebCore)
            9 WTF::CheckedPtr<WebCore::FontLoadRequestClient, WTF::RawPtrTraits<WebCore::FontLoadRequestClient>>::derefIfNotNull() (WebCore)
              9 WTF::CheckedPtr<WebCore::FontLoadRequestClient, WTF::RawPtrTraits<WebCore::FontLoadRequestClient>>::~CheckedPtr() (WebCore)
                9 WTF::CheckedPtr<WebCore::FontLoadRequestClient, WTF::RawPtrTraits<WebCore::FontLoadRequestClient>>::~CheckedPtr() (WebCore)
          ==> 10 WebCore::CachedFontLoadRequest::fontLoaded(WebCore::CachedFont&) (WebCore) <==
                    10 WebCore::CachedFont::checkNotify(WebCore::NetworkLoadMetrics const&, WebCore::LoadWillContinueInAnotherProcess) (WebCore)
                      10 WebCore::SubresourceLoader::didFinishLoading(WebCore::NetworkLoadMetrics const&) (WebCore)
                        10 WebKit::WebResourceLoader::didFinishResourceLoad(WebCore::NetworkLoadMetrics&&) (WebKit)
                          9 auto void IPC::callMemberFunction<WebKit::WebResourceLoader, WebKit::WebResourceLoader, void (WebCore::NetworkLoadMetrics&&), std::__1::tuple<WebCore::NetworkLoadMetrics>>(WebKit::WebResourceLoader*, void (WebKit::WebResourceLoader::*)(WebCore::NetworkLoadMetrics&&), std::__1::tuple<WebCore::NetworkLoadMetrics>&&)::'lambda'(auto&&...)::operator()<WebCore::NetworkLoadMetrics>(auto&&...) const (WebKit)
```

[Chris Dumez]

<rdar://166072004>

[Chris Dumez]

Pull request: https://github.com/WebKit/WebKit/pull/55218

[EWS]

Committed 304322@main (bfec65f58317): <https://commits.webkit.org/304322@main>

Reviewed commits have been landed. Closing PR #55218 and removing active labels.