Bug 247870

[Win] REGRESSION(255254@main): TestWTF.WTF_RunLoopDeathTest.CapabilityIsCurrentFailureAssertsDeathTest is failing since

Buildbot: builder WinCairo-64-bit-WKL-Debug-Tests build 2736
https://build.webkit.org/#/builders/32/builds/2736

    TestWTF.WTF_RunLoopDeathTest.CapabilityIsCurrentFailureAssertsDeathTest
        
        C:\BW\WinCairo-64-bit-WKL-Debug-Build\build\Source\ThirdParty\gtest\src\gtest-port.cc:865
        Failed
        Syntax error at index 35 in simple regular expression "ASSERTION FAILED: runLoop.isCurrent()": '(' is unsupported.
        
        
        C:\BW\WinCairo-64-bit-WKL-Debug-Build\build\Source\ThirdParty\gtest\src\gtest-port.cc:865
        Failed
        Syntax error at index 36 in simple regular expression "ASSERTION FAILED: runLoop.isCurrent()": ')' is unsupported.
        
        
        C:\BW\WinCairo-64-bit-WKL-Debug-Build\build\Tools\TestWebKitAPI\Tests\WTF\RunLoop.cpp:256
        Death test: { WTF::initializeMainThread(); Thread::create("CapabilityIsCurrentNegative thread", [&] { assertIsCurrent(RunLoop::main()); })->waitForCompletion(); }
            Result: died but not with expected error.
          Expected: contains regular expression "ASSERTION FAILED: runLoop.isCurrent()"
        Actual msg:
        [  DEATH   ] ASSERTION FAILED: runLoop.isCurrent()
        [  DEATH   ] C:\BW\WinCairo-64-bit-WKL-Debug-Build\build\WebKitBuild\Debug\WTF\Headers\wtf/RunLoop.h(290) : WTF::assertIsCurrent
        [  DEATH   ] 1   00007FF8FA44248B WTFCrash
        [  DEATH   ] 2   00007FF8ECDADACE (null)
        [  DEATH   ] 3   00007FF8ED26EF34 (null)
        [  DEATH   ] 4   00007FF8ED260108 (null)
        [  DEATH   ] 5   00007FF8ED2642AB (null)
        [  DEATH   ] 6   00007FF8FA45A503 WTF::CrossThreadTaskHandler::setCompletionCallback
        [  DEATH   ] 7   00007FF8FA4F85F8 WTF::Thread::dump
        [  DEATH   ] 8   00007FF8FA5D4014 WTF::Thread::currentMayBeNull
        [  DEATH   ] 9   00007FF9064B1FFA o_exp
        [  DEATH   ] 10  00007FF9083E7974 BaseThreadInitThunk
        [  DEATH   ] 11  00007FF9247AA271 RtlUserThreadStart
        [  DEATH   ]