[Webkit-unassigned] [Bug 81504] New: [chromium] DRT crashes at shutdown.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=81504

           Summary: [chromium] DRT crashes at shutdown.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P1
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: zhenghao at chromium.org


In debug build of DRT, it crashes randomly at shutdown. I think it's due to a race condition. I can trigger the crash easily by this test:

out/Debug/DumpRenderTree /usr/local/code/webkit.git/LayoutTests/compositing/iframes/overlapped-nested-iframes.html

The stacktrace:

ASSERTION FAILED: !CCLayerTreeHost::anyLayerTreeHostInstanceExists()
Source/WebKit/chromium/src/WebCompositorImpl.cpp(78) : static void WebKit::WebCompositorImpl::shutdown()
1   0x48fd50
2   0x48fbbf
3   0x46cc36
4   0x4378d3
5   0x7fb676dcac4d __libc_start_main
6   0x422fd9
[30647:30647:19876206991:ERROR:process_util_posix.cc(142)] Received signal 11
        base::debug::StackTrace::StackTrace() [0x7315c6]
        base::(anonymous namespace)::StackDumpSignalHandler() [0x6ec18d]
        0x7fb676ddfaf0
        WebKit::WebCompositorImpl::shutdown() [0x48fd5a]
        WebKit::WebCompositor::shutdown() [0x48fbbf]
        TestShell::~TestShell() [0x46cc36]
        main [0x4378d3]
        0x7fb676dcac4d
        0x422fd9

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