Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 4ae3b23da26b52582ba246d300fc25acdc0e6816
      
https://github.com/WebKit/WebKit/commit/4ae3b23da26b52582ba246d300fc25acdc0e6816
  Author: Jean-Yves Avenard <[email protected]>
  Date:   2026-06-10 (Wed, 10 Jun 2026)

  Changed paths:
    A LayoutTests/media/video-webm-seek-multi-audio-tracks-expected.txt
    A LayoutTests/media/video-webm-seek-multi-audio-tracks.html
    M Source/WebCore/platform/graphics/cocoa/MediaPlayerPrivateWebM.mm

  Log Message:
  -----------
  Crash in WebCore::MediaPlayerPrivateWebM::reenqueueMediaForTime
https://bugs.webkit.org/show_bug.cgi?id=316880
rdar://179182491

Reviewed by Eric Carlson.

Should a track become disabled while seeking, the renderer's track would
get destroyed and removed from the m_trackIdentifiers. The code assumed
that if the trackIdentifier was in m_trackBufferMap , then it would be enabled.

We now guard against this by first checking if the trackIdentifier is in the
map and abort.

Added tests.

* LayoutTests/media/video-webm-seek-multi-audio-tracks-expected.txt: Added.
* LayoutTests/media/video-webm-seek-multi-audio-tracks.html: Added.
* Source/WebCore/platform/graphics/cocoa/MediaPlayerPrivateWebM.mm:
(WebCore::MediaPlayerPrivateWebM::reenqueueMediaForTime):
(WebCore::MediaPlayerPrivateWebM::trackDidChangeEnabled): Pre-emptive 
correctness. Just in case as it's a similar pattern as the above.

Canonical link: https://commits.webkit.org/314993@main



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