REGRESSION (r279542): [ Mac Debug ] imported/w3c/web-platform-tests/media-source tests are crashing

• Component: Media
• Status: RESOLVED FIXED

imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-implicit.html
imported/w3c/web-platform-tests/media-source/mediasource-changetype-play.html
imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-without-codecs-parameter.html
imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-negative.html

History: https://results.webkit.org/?suite=layout-tests&suite=layout-tests&suite=layout-tests&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fmedia-source%2Fmediasource-changetype-play-implicit.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fmedia-source%2Fmediasource-changetype-play-negative.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fmedia-source%2Fmediasource-changetype-play-without-codecs-parameter.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fmedia-source%2Fmediasource-changetype-play.html

It looks like the tests started crashing since the change made in https://trac.webkit.org/changeset/279542/webkit

https://build.webkit.org/results/Apple-BigSur-Debug-AppleSilicon-WK2-Tests/r279586%20(2011)/results.html

++ See below for the crash log ++

No crash log found for GPUProcess:30810.
stdout:
stderr:
(cpu_info.cc:53): Available number of cores: 8
ASSERTION FAILED: m_mediaSamples.isEmpty()
/Volumes/Data/worker/bigsur-debug/build/Source/WebCore/platform/graphics/avfoundation/objc/SourceBufferPrivateAVFObjC.mm(731) : auto WebCore::SourceBufferPrivateAVFObjC::resetParserState()::(anonymous class)::operator()() const
LEAK: 1 WebPageProxy

++ ++ ++

[Radar WebKit Bug Importer]

<rdar://problem/80230748>

[Truitt Savell]

reverted the change that caused this in https://trac.webkit.org/changeset/279622/webkit