=== tests/cases/compiler/sourceMapValidationFunctionExpressions.ts ===
var greetings = 0;
>greetings : number
>0 : number

var greet = (greeting: string): number => {
>greet : (greeting: string) => number
>(greeting: string): number => {    greetings++;    return greetings;} : (greeting: string) => number
>greeting : string

    greetings++;
>greetings++ : number
>greetings : number

    return greetings;
>greetings : number
}
greet("Hello");
>greet("Hello") : number
>greet : (greeting: string) => number
>"Hello" : string

var incrGreetings = () => greetings++;
>incrGreetings : () => number
>() => greetings++ : () => number
>greetings++ : number
>greetings : number