Root cause: when FullscreenPlayerView deallocates during window close,
AVPlayerLayer.player reference is released via autorelease pool drain
on main thread. CoreMedia background threads simultaneously access
sFigNotificationCenterWeakListenerLinks dictionary (weak listener
cleanup), causing use-after-free race condition.
Fix:
- toggleFullscreen(): set playerView.player = nil BEFORE fw.close()
- FullscreenPlayerView.viewWillMove(toWindow: nil): safety net to
nil out player when view is removed from window by any means
This ensures the AVPlayer reference is released synchronously on the
main thread, before any autorelease pool drain can race with CoreMedia
internal cleanup threads.
yumoqing
6bbd86006a