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Chris Tate
c296362834
An early exit from a loop over an iterator-typed Map or Set method parks the iterator with a second yield of the current entry. That yield read the entry again by its index, which aborted with a map iteration error when the loop had deleted the entry. Each step now reads the entry once into a local that both yields answer. `entries()` takes the typed walk only for a slot whose yield type is the key and value pair record. Other yield types, such as `IterableIterator<any>` or `<unknown>`, keep the checked adapter instead of failing to compile.