Bug 256437 – Iterator does not throw an exception when it is non-object in baselineJIT

• Component: JavaScriptCore
• Status: RESOLVED FIXED

===========test.js===========
for (let i = 0; i < 50; i++) {
  try {
    const arr = [100, 101];
    arr[Symbol.iterator] = Symbol;
    [] = arr;
    print("hello")
  } catch (e) {}
}
=========end of test.js======
Run args:
./jsc test.js --useConcurrentJIT=0 --jitPolicyScale=0

JSC wrongly print "hello" in baselineJIT instead of throwing an exception.

[Alexey Proskuryakov]

I can reproduce on macOS (13.4 beta).

[Radar WebKit Bug Importer]

<rdar://problem/109332913>

[Sosuke Suzuki]

Pull request: https://github.com/WebKit/WebKit/pull/29634

[EWS]

Committed 288071@main (54e08075c3f0): <https://commits.webkit.org/288071@main>

Reviewed commits have been landed. Closing PR #29634 and removing active labels.