[Webkit-unassigned] [Bug 275939] New: Negative exponent exception for BitInt not thrown in JIT compiler

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=275939

            Bug ID: 275939
           Summary: Negative exponent exception for BitInt not thrown in
                    JIT compiler
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: q602706150 at gmail.com

The following script should output 10 lines of same result.
```
function opt() {
    try {
        1n ** -1n;
    } catch (e) {
        return e
    }
    return 0;
}
for (let i = 0; i < 10; i++) {
    print(opt())
}
```

Actual output:
```
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
RangeError: Negative exponent is not allowed
0
0
0
```

run args:
cmake-build-debug/bin/jsc --useConcurrentJIT=0 --jitPolicyScale=0.00005 ./test.js

commit id:
47fe298829ac629f561518641b7e6bc4069cb09b

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