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=== tests/cases/compiler/mapConstructorOnReadonlyTuple.ts ===
const pairs = [['1', 1], ['2', 2]] as const
>pairs : readonly [readonly ["1", 1], readonly ["2", 2]]
>[['1', 1], ['2', 2]] as const : readonly [readonly ["1", 1], readonly ["2", 2]]
>[['1', 1], ['2', 2]] : readonly [readonly ["1", 1], readonly ["2", 2]]
>['1', 1] : readonly ["1", 1]
>'1' : "1"
>1 : 1
>['2', 2] : readonly ["2", 2]
>'2' : "2"
>2 : 2
new Map(pairs);
>new Map(pairs) : Map<"1" | "2", 1 | 2>
>Map : MapConstructor
>pairs : readonly [readonly ["1", 1], readonly ["2", 2]]
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