[Webkit-unassigned] [Bug 196548] New: [ Mac Debug ] TestWebKitAPI.ProcessSwap.ReuseSuspendedProcessForRegularNavigationRetainBundlePage is a flaky crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=196548

            Bug ID: 196548
           Summary: [ Mac Debug ]
                    TestWebKitAPI.ProcessSwap.ReuseSuspendedProcessForRegu
                    larNavigationRetainBundlePage is a flaky crash
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Macintosh
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit API
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sroberts at apple.com

The following API test is a flaky crash on Mojave Debug

TestWebKitAPI.ProcessSwap.ReuseSuspendedProcessForRegularNavigationRetainBundlePage

Probable cause:

Flaky failures have been observed in on Mojave Debug queues for its entire available history https://build.webkit.org/builders/Apple%20Mojave%20Debug%20WK2%20%28Tests%29?numbuilds=200

Test was added in https://trac.webkit.org/changeset/241306/webkit 

Local testing with current revision and r241306 yield the same crash logs. Took about 15 tries to get it to crash locally.

Reproduced with:

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

Will attach full crash log to radar.

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore            0x00000001020a1d00 WTFCrash + 16
1   com.apple.WebKit                    0x0000000107235bcb WTFCrashWithInfo(int, char const*, char const*, int) + 27
2   com.apple.WebKit                    0x0000000107972cc7 WebKit::FrameLoadState::didFailProvisionalLoad() + 103
3   com.apple.WebKit                    0x0000000107aa9199 WebKit::WebFrameProxy::didFailProvisionalLoad() + 25
4   com.apple.WebKit                    0x0000000107998aa9 WebKit::ProvisionalPageProxy::didFailProvisionalLoadForFrame(unsigned long long, WebCore::SecurityOriginData const&, unsigned long long, WTF::String const&, WebCore::ResourceError const&, WebKit::UserData const&) + 393
5   com.apple.WebKit                    0x00000001079aef12 void IPC::callMemberFunctionImpl<WebKit::ProvisionalPageProxy, void (WebKit::ProvisionalPageProxy::*)(unsigned long long, WebCore::SecurityOriginData const&, unsigned long long, WTF::String const&, WebCore::ResourceError const&, WebKit::UserData const&), std::__1::tuple<unsigned long long, WebCore::SecurityOriginData, unsigned long long, WTF::String, WebCore::ResourceError, WebKit::UserData>, 0ul, 1ul, 2ul, 3ul, 4ul, 5ul>(WebKit::ProvisionalPageProxy*, void (WebKit::ProvisionalPageProxy::*)(unsigned long long, WebCore::SecurityOriginData const&, unsigned long long, WTF::String const&, WebCore::ResourceError const&, WebKit::UserData const&), std::__1::tuple<unsigned long long, WebCore::SecurityOriginData, unsigned long long, WTF::String, WebCore::ResourceError, WebKit::UserData>&&, std::__1::integer_sequence<unsigned long, 0ul, 1ul, 2ul, 3ul, 4ul, 5ul>) + 434

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