[Webkit-unassigned] [Bug 229526] New: REGRESSION(r281513?): [ JSC Catalina+ Debug ] 16 stress/intl-enumeration.js (JSC Tests) are flaky failing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=229526

            Bug ID: 229526
           Summary: REGRESSION(r281513?): [ JSC Catalina+ Debug ] 16
                    stress/intl-enumeration.js (JSC Tests) are flaky
                    failing
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: Jenner at apple.com

It looks like the tests were added here:
https://trac.webkit.org/changeset/281513/webkit

and have been flaky failing with the following assertion ever since:

ASSERTION FAILED: !m_needExceptionCheck
stress/intl-enumeration.js.bytecode-cache: ./runtime/VM.cpp(1485) : void JSC::VM::verifyExceptionCheckNeedIsSatisfied(unsigned int, JSC::ExceptionEventLocation &)


Build: 
https://build.webkit.org/#/builders/100/builds/742


In their history it does appear that they all fail at the same intervals as well:
https://results.webkit.org/?suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&suite=javascriptcore-tests&test=stress%2Fintl-enumeration.js.dfg-eager&test=stress%2Fintl-enumeration.js.dfg-eager-no-cjit-validate&test=stress%2Fintl-enumeration.js.eager-jettison-no-cjit&test=stress%2Fintl-enumeration.js.ftl-eager&test=stress%2Fintl-enumeration.js.ftl-eager-no-cjit&test=stress%2Fintl-enumeration.js.ftl-eager-no-cjit-b3o1&test=stress%2Fintl-enumeration.js.ftl-no-cjit-b3o0&test=stress%2Fintl-enumeration.js.ftl-no-cjit-no-inline-validate&test=stress%2Fintl-enumeration.js.ftl-no-cjit-no-put-stack-validate&test=stress%2Fintl-enumeration.js.ftl-no-cjit-small-pool&test=stress%2Fintl-enumeration.js.ftl-no-cjit-validate-sampling-profiler&test=stress%2Fintl-enumeration.js.mini-mode&test=stress%2Fintl-enumeration.js.no-cjit-validate-phases&test=stress%2Fintl-enumeration.js.no-ftl&test=stress%2Fintl-enumeration.js.no-llint&test=stress%2Fmap-iteration-oas.js.default&style=debug

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