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1// @strict: true
2
3// Repro from #30050
4
5interface Obj<T> {
6	ref: T;
7}
8interface Func<T> {
9	(x: T): void;
10}
11type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends ((k: infer I) => void) ? I : never;
12type CtorOf<T> = (arg: UnionToIntersection<T>) => T;
13
14interface Big {
15    "0": { common?: string; "0"?: number, ref?: Obj<Big["0"]> | Func<Big["0"]>; }
16    "1": { common?: string; "1"?: number, ref?: Obj<Big["1"]> | Func<Big["1"]>; }
17    "2": { common?: string; "2"?: number, ref?: Obj<Big["2"]> | Func<Big["2"]>; }
18    "3": { common?: string; "3"?: number, ref?: Obj<Big["3"]> | Func<Big["3"]>; }
19    "4": { common?: string; "4"?: number, ref?: Obj<Big["4"]> | Func<Big["4"]>; }
20    "5": { common?: string; "5"?: number, ref?: Obj<Big["5"]> | Func<Big["5"]>; }
21    "6": { common?: string; "6"?: number, ref?: Obj<Big["6"]> | Func<Big["6"]>; }
22    "7": { common?: string; "7"?: number, ref?: Obj<Big["7"]> | Func<Big["7"]>; }
23    "8": { common?: string; "8"?: number, ref?: Obj<Big["8"]> | Func<Big["8"]>; }
24    "9": { common?: string; "9"?: number, ref?: Obj<Big["9"]> | Func<Big["9"]>; }
25    "10": { common?: string; "10"?: number, ref?: Obj<Big["10"]> | Func<Big["10"]>; }
26    "11": { common?: string; "11"?: number, ref?: Obj<Big["11"]> | Func<Big["11"]>; }
27    "12": { common?: string; "12"?: number, ref?: Obj<Big["12"]> | Func<Big["12"]>; }
28    "13": { common?: string; "13"?: number, ref?: Obj<Big["13"]> | Func<Big["13"]>; }
29    "14": { common?: string; "14"?: number, ref?: Obj<Big["14"]> | Func<Big["14"]>; }
30    "15": { common?: string; "15"?: number, ref?: Obj<Big["15"]> | Func<Big["15"]>; }
31    "16": { common?: string; "16"?: number, ref?: Obj<Big["16"]> | Func<Big["16"]>; }
32    "17": { common?: string; "17"?: number, ref?: Obj<Big["17"]> | Func<Big["17"]>; }
33}
34declare function getCtor<T extends keyof Big>(comp: T): CtorOf<Big[T]>
35
36declare var all: keyof Big;
37const ctor = getCtor(all);
38const comp = ctor({ common: "ok", ref: x => console.log(x) });
39