[Webkit-unassigned] [Bug 249303] New: [ New Test ] (257736 at main): [ macOS Debug ] ASSERTION FAILED: m_targetWindowForMovePreparation => m_targetWindowForMovePreparation == window

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=249303

            Bug ID: 249303
           Summary: [ New Test ] (257736 at main): [ macOS Debug ] ASSERTION
                    FAILED: m_targetWindowForMovePreparation =>
                    m_targetWindowForMovePreparation == window
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rackler at apple.com

Description:
TestWebKitAPI.WKWebView.PrepareForMoveToWindowShouldNotCrashWhenRemovingWindowObservers is a consistent crash

The test was added at 257736 at main and has been a consistent crash since then.

This issue can be bisected to 257736 at main using the command: 
run-api-tests --debug TestWebKitAPI.WKWebView.PrepareForMoveToWindowShouldNotCrashWhenRemovingWindowObservers

History:
https://results.webkit.org/?suite=api-tests&test=TestWebKitAPI.WKWebView.PrepareForMoveToWindowShouldNotCrashWhenRemovingWindowObservers&style=debug&limit=50000

Crashed

    TestWebKitAPI.WKWebView.PrepareForMoveToWindowShouldNotCrashWhenRemovingWindowObservers
        ASSERTION FAILED: m_targetWindowForMovePreparation => m_targetWindowForMovePreparation == window
        /Volumes/Data/worker/trunk-sunburst-debug-archive/build/OpenSource/Source/WebKit/UIProcess/mac/WebViewImpl.mm(2120) : void WebKit::WebViewImpl::viewWillMoveToWindowImpl(NSWindow *)
        1   0x124227fa9 WTFCrash
        2   0x152eb3435 WebKit::WebViewImpl::viewWillMoveToWindowImpl(NSWindow*)
        3   0x152eb4d8f WebKit::WebViewImpl::prepareForMoveToWindow(NSWindow*, WTF::Function<void ()>&&)
        4   0x152b88b70 -[WKWebView(WKPrivateMac) _prepareForMoveToWindow:completionHandler:]
        5   0x10fea297c WKWebView_PrepareForMoveToWindowShouldNotCrashWhenRemovingWindowObservers_Test::TestBody()
        6   0x1105718db void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)
        7   0x11053c69a void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)
        8   0x11053c5e3 testing::Test::Run()
        9   0x11053d761 testing::TestInfo::Run()
        10  0x11053e7a4 testing::TestSuite::Run()
        11  0x11054d76b testing::internal::UnitTestImpl::RunAllTests()
        12  0x11057629b bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*)
        13  0x11054d12a bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*)
        14  0x11054d015 testing::UnitTest::Run()
        15  0x10fb75071 RUN_ALL_TESTS()
        16  0x10fb75006 TestWebKitAPI::TestsController::run(int, char**)
        17  0x11050c832 main
        18  0x7ff819a5942c start
        LEAK: 1 WebPage
        LEAK: 1 WebFrame
        LEAK: 4 RenderObject
        LEAK: 1 Page
        LEAK: 1 Frame
        LEAK: 1 CachedResource
        LEAK: 5 WebCoreNode

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