Poor error recovery when `enum` is used as a parameter name

TypeScript Version: 3.6.2

Search Terms: expression expected reserved word

Code

function converter<Enum>(values: string[], enums: Enum[]): Map<Enum, string> {
	return new Map<Enum, string>(
		enums.map((enum: Enum, index: number) => [ enum, values[index] ])
	);
}

Expected behavior:
After some confusion why this displays so many red curlies, the error should make it clear to me that the reserved word enum is accidentaly being used as an argument name. An error is given on enum saying something along the lines of You cannot use enum as a variable/argument because it is a reserved word.

Actual behavior:
After a LOT of confusion, one realizes that the reserved word enum is accidentally being used as an argument name. An error is given on several parts in the above code, where the most helpful one is Expression expected (ts1109), which is just unnecesarily confusing.

Playground Link

Related Issues:
None that seem related.

Reproduziere die Diagnose mit dem bereitgestellten Code im TypeScript 3.6.2 Playground und vergleiche anschließend die Parserfehler rund um den Parameternamen enum. Verbessere den gemeldeten Fehler so, dass er die missbräuchliche Verwendung eines reservierten Worts erkennt, ohne verwirrende Folgefehler zu erzeugen, und überprüfe das Ergebnis anhand desselben Beispiels.