[Webkit-unassigned] [Bug 197925] New: ASSERTION FAILED: m_ptr WebKit::WebProcessProxy, WTF::DumbPtrTraits<WebKit::WebProcessProxy> >::ptr() 79 API Tests are crashing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=197925

            Bug ID: 197925
           Summary: ASSERTION FAILED: m_ptr WebKit::WebProcessProxy,
                    WTF::DumbPtrTraits<WebKit::WebProcessProxy> >::ptr()
                    79 API Tests are crashing
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit API
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sroberts at apple.com

After changes in https://trac.webkit.org/changeset/245339 , seeing 79 API test crashes on several queues. 

https://build.webkit.org/builders/Apple%20Mojave%20Release%20WK1%20%28Tests%29/builds/4988/steps/run-api-tests/logs/stdio

run-api-tests TestWebKitAPI.ProcessSwap.NavigateBackAfterClientSideRedirect --debug

Hits the following Assertion with r245339, passes in prior builds.

ASSERTION FAILED: m_ptr
        /Volumes/Data/worker/liberty-debug-archive/build/OpenSource/WebKitBuild/Debug/usr/local/include/wtf/Ref.h(120) : T *WTF::Ref<WebKit::WebProcessProxy, WTF::DumbPtrTraits<WebKit::WebProcessProxy> >::ptr() const [T = WebKit::WebProcessProxy, PtrTraits = WTF::DumbPtrTraits<WebKit::WebProcessProxy>]
        1   0x1133c4429 WTFCrash
        2   0x118e0ebcb WTFCrashWithInfo(int, char const*, char const*, int)
        3   0x1196b53e8 WTF::Ref<WebKit::WebProcessProxy, WTF::DumbPtrTraits<WebKit::WebProcessProxy> >::ptr() const
        4   0x1199219f1 WebKit::WebProcessCache::CachedProcess::CachedProcess(WTF::Ref<WebKit::WebProcessProxy, WTF::DumbPtrTraits<WebKit::WebProcessProxy> >&&)

Will attach full crash log to Radar.

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