[Webkit-unassigned] [Bug 159939] New: REGRESSION(r203354-r203364): ARM64 Crash running ecma/FunctionObjects/15.3.1.1-3.js variants

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=159939

            Bug ID: 159939
           Summary: REGRESSION(r203354-r203364): ARM64 Crash running
                    ecma/FunctionObjects/15.3.1.1-3.js variants
    Classification: Unclassified
           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: msaboff at apple.com

On ARM64 bots, we started seeing failures running
    mozilla-tests.yaml/ecma/FunctionObjects/15.3.1.1-3.js.mozilla-ftl-eager-no-cjit-validate-phases
    mozilla-tests.yaml/ecma/FunctionObjects/15.3.2.1-3.js.mozilla-ftl-eager-no-cjit-validate-phases
    mozilla-tests.yaml/ecma/FunctionObjects/15.3.5-1.js.mozilla-ftl-eager-no-cjit-validate-phases

Below is the log output for one of the failures.  Possibly a RELEASE_ASSERT.
INFO: mozilla-tests.yaml/ecma/FunctionObjects/15.3.1.1-3.js.mozilla-ftl-eager-no-cjit-validate-phases: ./test_script_12739: line 2: 19831 Trace/BPT trap: 5       ( "$@" /System/Library/Frameworks/JavaScriptCore.framework/Resources/jsc --useFTLJIT\=false --useFunctionDotArguments\=true --maxPerThreadStackUsage\=1572864 --validateBytecode\=true --validateGraphAtEachPhase\=true --useFTLJIT\=true --useConcurrentJIT\=false --thresholdForJITAfterWarmUp\=100 --thresholdForJITAfterWarmUp\=10 --thresholdForJITSoon\=10 --thresholdForOptimizeAfterWarmUp\=20 --thresholdForOptimizeAfterLongWarmUp\=20 --thresholdForOptimizeSoon\=20 --thresholdForFTLOptimizeAfterWarmUp\=20 --thresholdForFTLOptimizeSoon\=20 --maximumEvalCacheableSourceLength\=150000 ../shell.js 15.3.1.1-3.js )
mozilla-tests.yaml/ecma/FunctionObjects/15.3.1.1-3.js.mozilla-ftl-eager-no-cjit-validate-phases: ERROR: Unexpected exit code: 133

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