=== tests/cases/compiler/undefinedInferentialTyping.ts ===
function f<T>(arr: T[], elemnt: T): T {
>f : <T>(arr: T[], elemnt: T) => T
>T : T
>arr : T[]
>T : T
>elemnt : T
>T : T
>T : T

    return null;
}

var a = f([], 3); // should be number
>a : number
>f([], 3) : number
>f : <T>(arr: T[], elemnt: T) => T
>[] : undefined[]