Bug 258559 – regExpProtoFuncExec and operationRegExpExecGeneric throw different messages when thisObject is not a RegExp object

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[ChristineWillice]

``````test.js``````

for (let v0 = 0; v0 < 40; v0++) {
    let v16 = RegExp.prototype
    try {
      v16.test();
    } catch (e23) {
      print(e23)
    }
  }

```````````````````

Run args: ./jsc  -f test.js --useConcurrentJIT=0 --jitPolicyScale=0

Output:
TypeError: Builtin RegExp exec can only be called on a RegExp object
TypeError: Builtin RegExp exec can only be called on a RegExp object
TypeError: Builtin RegExp exec can only be called on a RegExp object
TypeError: Builtin RegExp exec can only be called on a RegExp object
TypeError: Builtin RegExp exec can only be called on a RegExp object
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error
TypeError: Type error

When thisObject is not a RegExp object:

In RegExpPrototype.cpp, regExpProtoFuncExec throw `Builtin RegExp exec can only be called on a RegExp object`,

In DFGOperations.cpp, operationRegExpExecGeneric throw `Type error`.

[Radar WebKit Bug Importer]

<rdar://problem/111737204>

[Sosuke Suzuki]

Pull request: https://github.com/WebKit/WebKit/pull/28444

[EWS]

Committed 278663@main (9d09c5e0ff19): <https://commits.webkit.org/278663@main>

Reviewed commits have been landed. Closing PR #28444 and removing active labels.