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Normative: Add missing function name for Iterator.prototype[Symbol.toStringTag] accessors #3621

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@anba anba commented Jun 11, 2025

The function name must be explicitly specified for methods whose property key is a Symbol value.

…StringTag] accessors

The function name must be explicitly specified for methods whose
property key is a Symbol value.
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anba commented Jun 11, 2025

JSC doesn't assign the expected name:

>>> Object.getOwnPropertyDescriptor(Iterator.prototype, Symbol.toStringTag).get.name
"get "
>>> Object.getOwnPropertyDescriptor(Iterator.prototype, Symbol.toStringTag).set.name
"set "

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ljharb commented Jun 11, 2025

oof. does test262 not have tests covering the name?

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anba commented Jun 11, 2025

I don't think there's test262 coverage for this. Or at least I don't see any coverage in https://github.com/tc39/test262/tree/main/test/built-ins/Iterator/prototype/Symbol.toStringTag. (I'm currently exploring if it's possible to generate tests for "name" and "length" properties of built-in functions, that's why I found this bug.)

@michaelficarra michaelficarra added normative change Affects behavior required to correctly evaluate some ECMAScript source text needs test262 tests The proposal should specify how to test an implementation. Ideally via github.com/tc39/test262 needs consensus This needs committee consensus before it can be eligible to be merged. labels Jun 16, 2025
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