[Webkit-unassigned] [Bug 233353] New: [JSC] Optimize Promise Error in DFG

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=233353

            Bug ID: 233353
           Summary: [JSC] Optimize Promise Error in DFG
           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: vulbugs at gmail.com

OS: ubuntu20.04
Architecture: <x64>

./jsc --useConcurrentJIT=false --thresholdForOptimizeAfterWarmUp=50 bug.js

expected output
undefined
undefined

actual output
undefined
NaN


bug.js
##################################
function opt() {
    const v1 = [Infinity];
    const v2 = v1[4096];
    new Promise(Promise);
    return v2;

}
print(opt());
for (let i = 0; i < 0x1000; i++) { opt(); }
print(opt());

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