[Webkit-unassigned] [Bug 209688] New: [ Mac wk2 ] MediaPlayerPrivateInterface crash in VideoFullscreenManager

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=209688

            Bug ID: 209688
           Summary: [ Mac wk2 ] MediaPlayerPrivateInterface crash in
                    VideoFullscreenManager
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Macintosh
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Lawrence.j at apple.com

Created attachment 394769

  --> https://bugs.webkit.org/attachment.cgi?id=394769&action=review

scrubber-support-click-crash-log

media/modern-media-controls/scrubber-support/scrubber-support-click.html

Description:
This test is flaky crashing on Mac wk2. The flaky crashing appeared in the visible history on 03/26/2020.

History:
https://results.webkit.org/?suite=layout-tests&test=media%2Fmodern-media-controls%2Fscrubber-support%2Fscrubber-support-click.html&flavor=wk2

Crash log attached;
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebCore                   0x00000001255668b5 std::__1::unique_ptr<WebCore::MediaPlayerPrivateInterface, std::__1::default_delete<WebCore::MediaPlayerPrivateInterface> >::operator->() const + 21 (memory:2620)
1   com.apple.WebCore                   0x000000012556724a WebCore::MediaPlayer::createVideoFullscreenLayer() + 42 (MediaPlayer.cpp:762)
2   com.apple.WebCore                   0x00000001248c9706 WebCore::HTMLMediaElement::createVideoFullscreenLayer() + 54 (HTMLMediaElement.cpp:6251)
3   com.apple.WebCore                   0x0000000123177ca6 WebCore::VideoFullscreenModelVideoElement::createVideoFullscreenLayer() + 54 (VideoFullscreenModelVideoElement.mm:115)
4   com.apple.WebKit                    0x0000000116c1540c WebKit::VideoFullscreenManager::enterVideoFullscreenForVideoElement(WebCore::HTMLVideoElement&, unsigned int, bool) + 1628 (VideoFullscreenManager.mm:274)
5   com.apple.WebKit                    0x0000000116c18231 WebKit::VideoFullscreenManager::didCleanupFullscreen(unsigned long long)::$_7::operator()() const + 113 (VideoFullscreenManager.mm:524)
6   com.apple.WebKit                    0x0000000116c181ac invocation function for block in WebKit::VideoFullscreenManager::didCleanupFullscreen(unsigned long long) + 28 (VideoFullscreenManager.mm:521)
7   libdispatch.dylib                   0x00007fff6e8866c4 _dispatch_call_block_and_release + 12
8   libdispatch.dylib                   0x00007fff6e887658 _dispatch_client_callout + 8
9   libdispatch.dylib                   0x00007fff6e892cab _dispatch_main_queue_callback_4CF + 936
10  com.apple.CoreFoundation            0x00007fff349d8041 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
11  com.apple.CoreFoundation            0x00007fff34997e47 __CFRunLoopRun + 2028
12  com.apple.CoreFoundation            0x00007fff34996ffe CFRunLoopRunSpecific + 462
13  com.apple.Foundation                0x00007fff3702b2a8 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212
14  com.apple.Foundation                0x00007fff370ddd2f -[NSRunLoop(NSRunLoop) run] + 76
15  libxpc.dylib                        0x00007fff6eb2e51a _xpc_objc_main.cold.4 + 49
16  libxpc.dylib                        0x00007fff6eb2e460 _xpc_objc_main + 559
17  libxpc.dylib                        0x00007fff6eb2df93 xpc_main + 377
18  com.apple.WebKit                    0x000000011611421b WebKit::XPCServiceMain(int, char const**) + 1499 (XPCServiceMain.mm:172)
19  com.apple.WebKit                    0x00000001174acb1b WKXPCServiceMain + 27 (WKMain.mm:33)
20  com.apple.WebKit.WebContent         0x000000010af93ec2 main + 34 (AuxiliaryProcessMain.cpp:30)
21  libdyld.dylib                       0x00007fff6e8e0cc9 start + 1

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