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LibJS: Disable optimization in IteratorNextUnpack if next() is redefined
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Browse source 
81b6a11 regressed correctness by always bypassing the `next()` method
resolution for built-in iterators, causing incorrect behavior when
`next()` was redefined on built-in prototypes. This change fixes the
issue by storing a flag on built-in prototypes indicating whether
`next()` has ever been redefined.
This commit is contained in:
Aliaksandr Kalenik 2025-05-12 04:27:25 +03:00 • committed by Alexander Kalenik
commit f405d71657
Notes: github-actions[bot] 2025-05-12 11:42:25 +00:00
18 changed files with 151 additions and 8 deletions
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7
Libraries/LibJS/Runtime/Object.h
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@ -212,7 +212,12 @@ public:
virtual bool is_array_iterator() const { return false; }
virtual bool is_raw_json_object() const { return false; }
virtual BuiltinIterator* as_builtin_iterator() { return nullptr; }
virtual BuiltinIterator* as_builtin_iterator_if_next_is_not_redefined() { return nullptr; }
virtual bool is_array_iterator_prototype() const { return false; }
virtual bool is_map_iterator_prototype() const { return false; }
virtual bool is_set_iterator_prototype() const { return false; }
virtual bool is_string_iterator_prototype() const { return false; }
// B.3.7 The [[IsHTMLDDA]] Internal Slot, https://tc39.es/ecma262/#sec-IsHTMLDDA-internal-slot
virtual bool is_htmldda() const { return false; }