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#2721 — 9.4.4.2, 9.4.4.3, 9.4.4.4, 9.4.4.5: Compare isMapped variable to `true/false`, not `undefined`


9.4.4.2 [[DefineOwnProperty]] (P, Desc), step 6
9.4.4.3 [[Get]] (P, Receiver), step 5
9.4.4.4 [[Set]] ( P, V, Receiver), step 5
9.4.4.5 [[Delete]] (P), step 5

`isMapped` is a boolean-typed value, so it needs to be compared to `true/false`, not `undefined`.


fixed in rev26 editor's draft


in rev26