Bug 185546 – [GTK] media/video-playbackrate.html intermittently crashing

• Status: RESOLVED
• Resolution: FIXED
• Component: WebKitGTK

[Claudio Saavedra]

These are the first builds where this test started crashing, intermittently, both in the release and Wayland release bots:

https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20(Tests)/builds/6405
https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20Wayland%20(Tests)/builds/6147

I couldn't pinpoint to a specific commit that causes this.

The stacktrace coming from the bots shows:

Thread 1 (Thread 0x7fdd5a7f4700 (LWP 5540)):
#0  0x00007fddf8fe1228 in _ZN6WebKit27CoordinatedBackingStoreTile13setBackBufferERKN7WebCore7IntRectES4_ON3WTF6RefPtrIN7Nicosia6BufferENS5_13DumbPtrTraitsIS8_EEEERKNS1_8IntPointE () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#1  0x00007fddf8fe321d in _ZN6WebKit23CoordinatedBackingStore10updateTileEjRKN7WebCore7IntRectES4_ON3WTF6RefPtrIN7Nicosia6BufferENS5_13DumbPtrTraitsIS8_EEEERKNS1_8IntPointE () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#2  0x00007fddf8fe4407 in _ZN6WebKit24CoordinatedGraphicsScene19updateTilesIfNeededEPN7WebCore18TextureMapperLayerERKNS1_29CoordinatedGraphicsLayerStateERNS0_11CommitScopeE () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#3  0x00007fddf8fe5525 in _ZN6WebKit24CoordinatedGraphicsScene13setLayerStateEjRKN7WebCore29CoordinatedGraphicsLayerStateERNS0_11CommitScopeE () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#4  0x00007fddf8fe5ab0 in _ZN6WebKit24CoordinatedGraphicsScene16commitSceneStateERKN7WebCore24CoordinatedGraphicsStateE () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#5  0x00007fddf8fe5c9f in _ZN6WebKit24CoordinatedGraphicsScene17applyStateChangesERKN3WTF6VectorIN7WebCore24CoordinatedGraphicsStateELm0ENS1_15CrashOnOverflowELm16EEE () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#6  0x00007fddf8fe9e69 in _ZN6WebKit18ThreadedCompositor15renderLayerTreeEv () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#7  0x00007fddf8fe8c01 in _ZN6WebKit18CompositingRunLoop16updateTimerFiredEv () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libwebkit2gtk-4.0.so.37
#8  0x00007fddf6cb7b13 in _ZZN3WTF7RunLoop9TimerBaseC4ERS0_ENUlPvE_4_FUNES3_ () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18
#9  0x00007fddf22ee81a in g_main_dispatch () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.54.2/glib/gmain.c:3148
#10 g_main_context_dispatch () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.54.2/glib/gmain.c:3813
#11 0x00007fddf22eeba8 in g_main_context_iterate () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.54.2/glib/gmain.c:3886
#12 0x00007fddf22eeec2 in g_main_loop_run () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.54.2/glib/gmain.c:4082
#13 0x00007fddf6cb7f30 in _ZN3WTF7RunLoop3runEv () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18
#14 0x00007fddf6c8411b in _ZN3WTF6Thread10entryPointEPNS0_16NewThreadContextE () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18
#15 0x00007fddf6cb62d9 in _ZN3WTFL19wtfThreadEntryPointEPv () from /home/slave/webkitgtk/gtk-linux-64-release/build/WebKitBuild/Release/lib/libjavascriptcoregtk-4.0.so.18
#16 0x00007fddf3f65494 in start_thread (arg=0x7fdd5a7f4700) at pthread_create.c:333
#17 0x00007fddf03f593f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

[Claudio Saavedra]

Committed r231700: <https://trac.webkit.org/changeset/231700>

[Claudio Saavedra]

I need to learn to use this stuff.

[Diego Pino]

This test(s) has been consistenly passing in the last 4000 revisions. Closing bug.