[Win] ASSERTION FAILED: ::IsWindow(m_viewWindow) in WebView::initWithFrame

• Component: WebKit Misc.
• Status: NEW ---

[Fujii Hironori]

[Win] ASSERTION FAILED: ::IsWindow(m_viewWindow) in WebView::initWithFrame

WinCairo debug is randomly crashing for editing/pasteboard/paste-contents-with-side-effects.html recently.

Regressions: Unexpected crashes (2)
  editing/pasteboard/paste-contents-with-side-effects.html [ Crash ]


ASSERTION FAILED: ::IsWindow(m_viewWindow)
..\..\Source\WebKitLegacy\win\WebView.cpp(3076) : WebView::initWithFrame
1   00007FF8F95D1E8A WTFCrash
2   00007FF8C51C4381 WTFCrashWithInfo
3   00007FF8C53445E1 WebView::initWithFrame
4   00007FF8F7C02BCF createWebViewAndOffscreenWindow
5   00007FF8F7C51A6F UIDelegate::createWebViewWithRequest
6   00007FF8C539C64B WebChromeClient::createWindow
7   00007FF8C896F99E WebCore::Chrome::createWindow
8   00007FF8C87F3168 WebCore::createWindow
9   00007FF8C8999478 WebCore::DOMWindow::createWindow
10  00007FF8C898F378 WebCore::DOMWindow::open
11  00007FF8C5D346CF WebCore::jsDOMWindowInstanceFunction_openBody
12  00007FF8C5D5AB39 WebCore::IDLOperation<WebCore::JSDOMWindow>::call<&WebCore::jsDOMWindowInstanceFunction_openBody,0>
13  00007FF8C5CBBC39 WebCore::jsDOMWindowInstanceFunction_open
14  000002012B1911BE


241340@main: First red
241304@main: Last green

Buildbot: builder WinCairo-64-bit-WKL-Debug-Tests build 932
https://build.webkit.org/#/builders/32/builds/932

[Fujii Hironori]

Running the test case can't reproduce this assertion failure on my PC.
r282255 marked it in TestExpectations.

[Fujii Hironori]

r282376 marked it flaky.

[Radar WebKit Bug Importer]

<rdar://problem/83221300>