[Webkit-unassigned] [Bug 197917] New: REGRESSION (r245043) [Mac WK2 Debug] 2 Layout tests in http/wpt/webauthn/public-key-credential* directory are crashing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=197917

            Bug ID: 197917
           Summary: REGRESSION (r245043) [Mac WK2 Debug] 2 Layout tests in
                    http/wpt/webauthn/public-key-credential* directory are
                    crashing
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sroberts at apple.com

The following layout tests are flaky on Mac WK2 Debug

http/wpt/webauthn/public-key-credential-create-success-hid.https.html
http/wpt/webauthn/public-key-credential-get-success-hid.https.html

Probable cause:

After changes in https://trac.webkit.org/changeset/245043/webkit the above layout tests went from flaky failures in Mac WK2 Debug runs to crashes. 

Tests were marked as flaky in previous bugs 196377, 194780 for flaky failures in Mac WK2 Release and Debug builds. Now tests will crash instead of fail on Debug. 

Reproduced with:

run-webkit-tests http/wpt/webauthn/public-key-credential-get-success-hid.https.html --iter 100 -f --debug --exit-after-n-crashes=1

Will crash with builds including 245043. Previous builds will only flakily fail with 1500 iterations. 

Crash is the same for both tests

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Fwpt%2Fwebauthn%2Fpublic-key-credential-create-success-hid.https.html%20http%2Fwpt%2Fwebauthn%2Fpublic-key-credential-get-success-hid.https.html

Crash Log: https://build.webkit.org/results/Apple%20Mojave%20Debug%20WK2%20(Tests)/r245275%20(2606)/http/wpt/webauthn/public-key-credential-create-success-hid.https-crash-log.txt

0   com.apple.JavaScriptCore            0x0000000104e80ae0 WTFCrash + 16 (Assertions.cpp:305)
1   com.apple.WebKit                    0x00000001116d4f0b WTFCrashWithInfo(int, char const*, char const*, int) + 27
2   com.apple.WebKit                    0x000000011255822b WebKit::AuthenticatorManager::startDiscovery(WTF::HashSet<WebCore::AuthenticatorTransport, WTF::IntHash<WebCore::AuthenticatorTransport>, WTF::StrongEnumHashTraits<WebCore::AuthenticatorTransport> > const&) + 171 (AuthenticatorManager.cpp:224)
3   com.apple.WebKit                    0x0000000112557a99 WebKit::AuthenticatorManager::makeCredential(WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::PublicKeyCredentialCreationOptions const&, WTF::CompletionHandler<void (WTF::Variant<WebCore::PublicKeyCredentialData, WebCore::ExceptionData>&&)>&&) + 649 (AuthenticatorManager.cpp:143)
4   com.apple.WebKit                    0x000000011255a38e WebKit::WebAuthenticatorCoordinatorProxy::makeCredential(unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::PublicKeyCredentialCreationOptions const&) + 142 (WebAuthenticatorCoordinatorProxy.cpp:69)
5   com.apple.WebKit                    0x000000011296e98f void IPC::callMemberFunctionImpl<WebKit::WebAuthenticatorCoordinatorProxy, void (WebKit::WebAuthenticatorCoordinatorProxy::*)(unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::PublicKeyCredentialCreationOptions const&), std::__1::tuple<unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul>, WebCore::PublicKeyCredentialCreationOptions>, 0ul, 1ul, 2ul>(WebKit::WebAuthenticatorCoordinatorProxy*, void (WebKit::WebAuthenticatorCoordinatorProxy::*)(unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::PublicKeyCredentialCreationOptions const&), std::__1::tuple<unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul>, WebCore::PublicKeyCredentialCreationOptions>&&, std::__1::integer_sequence<unsigned long, 0ul, 1ul, 2ul>) + 207 (HandleMessage.h:42)
6   com.apple.WebKit                    0x00000001129669c0 void IPC::callMemberFunction<WebKit::WebAuthenticatorCoordinatorProxy, void (WebKit::WebAuthenticatorCoordinatorProxy::*)(unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::PublicKeyCredentialCreationOptions const&), std::__1::tuple<unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul>, WebCore::PublicKeyCredentialCreationOptions>, std::__1::integer_sequence<unsigned long, 0ul, 1ul, 2ul> >(std::__1::tuple<unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul>, WebCore::PublicKeyCredentialCreationOptions>&&, WebKit::WebAuthenticatorCoordinatorProxy*, void (WebKit::WebAuthenticatorCoordinatorProxy::*)(unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::PublicKeyCredentialCreationOptions const&)) + 112 (HandleMessage.h:48)
7   com.apple.WebKit                    0x0000000112966580 void IPC::handleMessage<Messages::WebAuthenticatorCoordinatorProxy::MakeCredential, WebKit::WebAuthenticatorCoordinatorProxy, void (WebKit::WebAuthenticatorCoordinatorProxy::*)(unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::PublicKeyCredentialCreationOptions const&)>(IPC::Decoder&, WebKit::WebAuthenticatorCoordinatorProxy*, void (WebKit::WebAuthenticatorCoordinatorProxy::*)(unsigned long long, WTF::Vector<unsigned char, 0ul, WTF::CrashOnOverflow, 16ul> const&, WebCore::PublicKeyCredentialCreationOptions const&)) + 336 (HandleMessage.h:121)
8   com.apple.WebKit                    0x00000001129662e5 WebKit::WebAuthenticatorCoordinatorProxy::didReceiveMessage(IPC::Connection&, IPC::Decoder&) + 133 (WebAuthenticatorCoordinatorProxyMessageReceiver.cpp:46)

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