Bug 277565 – Crash under makeString() in TextResourceDecoder::decodeAndFlush()

• Component: WebCore Misc.
• Status: RESOLVED FIXED

[Chris Dumez]

Crash under makeString() in TextResourceDecoder::decodeAndFlush():
```
        5 WTF::String WTF::makeString<WTF::String, WTF::String>(WTF::String, WTF::String)
  ==> 5 WebCore::TextResourceDecoder::decodeAndFlush(std::__1::span<unsigned char const, 18446744073709551615ul>) <==
            5 WebCore::TextResourceDecoder::textFromUTF8(std::__1::span<unsigned char const, 18446744073709551615ul>)
              5 WebCore::FetchBodyConsumer::takeAsText()
                5 WebCore::FetchBodyConsumer::resolve(WTF::Ref<WebCore::DeferredPromise, WTF::RawPtrTraits<WebCore::DeferredPromise>, WTF::DefaultRefDerefTraits<WebCore::DeferredPromise>>&&, WTF::String const&, WebCore::FetchBodyOwner*, WebCore::ReadableStream*)
                  5 WebCore::FetchBodyConsumer::loadingSucceeded(WTF::String const&)
                    5 WebCore::FetchBody::loadingSucceeded(WTF::String const&)
                      5 WebCore::FetchResponse::didSucceed(WebCore::NetworkLoadMetrics const&)
                        5 WebCore::FetchResponse::Loader::didSucceed(WebCore::NetworkLoadMetrics const&)
                          5 WebCore::DocumentThreadableLoader::didFinishLoading(WTF::ObjectIdentifierGeneric<WebCore::ResourceLoader, WTF::ObjectIdentifierThreadSafeAccessTraits<unsigned long long>, unsigned long long>, WebCore::NetworkLoadMetrics const&)
                            5 WebCore::CachedResource::checkNotify(WebCore::NetworkLoadMetrics const&, WebCore::LoadWillContinueInAnotherProcess)
```

[Chris Dumez]

<rdar://133008864>

[Chris Dumez]

Pull request: https://github.com/WebKit/WebKit/pull/31661

[EWS]

Committed 281811@main (fa8948cde34c): <https://commits.webkit.org/281811@main>

Reviewed commits have been landed. Closing PR #31661 and removing active labels.