=== tests/cases/compiler/undefinedInferentialTyping.ts ===
function f<T>(arr: T[], elemnt: T): T {
>f : <T>(arr: T[], elemnt: T) => T, Symbol(f, Decl(undefinedInferentialTyping.ts, 0, 0))
>T : T, Symbol(T, Decl(undefinedInferentialTyping.ts, 0, 11))
>arr : T[], Symbol(arr, Decl(undefinedInferentialTyping.ts, 0, 14))
>T : T, Symbol(T, Decl(undefinedInferentialTyping.ts, 0, 11))
>elemnt : T, Symbol(elemnt, Decl(undefinedInferentialTyping.ts, 0, 23))
>T : T, Symbol(T, Decl(undefinedInferentialTyping.ts, 0, 11))
>T : T, Symbol(T, Decl(undefinedInferentialTyping.ts, 0, 11))

    return null;
>null : null
}

var a = f([], 3); // should be number
>a : number, Symbol(a, Decl(undefinedInferentialTyping.ts, 4, 3))
>f([], 3) : number
>f : <T>(arr: T[], elemnt: T) => T, Symbol(f, Decl(undefinedInferentialTyping.ts, 0, 0))
>[] : undefined[]
>3 : number