Fix definition of GetOptionalListOfArrayIndexes#250
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jridgewell
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Mar 14, 2026
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The subroutine
GetOptionalListOfArrayIndexesis used for parsingignoreList, which is provided asa [List](https://tc39.es/ecma262/#sec-list-and-record-specification-type) of non-negative [integers](https://tc39.es/ecma262/#integer)to the DecodeSourceMapSources subroutine.However, inside the definition of the
GetOptionalListOfArrayIndexes:+0𝔽, which means skipping of0index (condition on 5.a:ecma426/spec.emu
Line 772 in 77bb672
nullas a valid value (operation 5.b.ii:ecma426/spec.emu
Line 776 in 77bb672
So, I believe it's a typo. Please, feel free to close if I'm wrong 🙏