=== tests/cases/compiler/quotedPropertyName3.ts ===
class Test {
>Test : Test

    "prop1": number;
    foo() {
>foo : () => void

        var x = () => this["prop1"];
>x : () => number
>() => this["prop1"] : () => number
>this["prop1"] : number
>this : Test

        var y: number = x();
>y : number
>x() : number
>x : () => number
    }
}