File: specializedSignatureAsCallbackParameter1.ts

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node-typescript 3.3.3333-1
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function x3(a: number, cb: (x: number) => number);
function x3(a: string, cb: (x: number) => number);
function x3(a: any, cb: (x: number) => number) {
   cb(a);
}
// both are errors
x3(1, (x: string) => 1); 
x3(1, (x: 'hm') => 1);