=== tests/cases/compiler/recursiveTypeComparison.ts ===
// Before fix this would take an exceeding long time to complete (#1170)

interface Observable<T> {
>Observable : Observable<T>
>T : T

    // This member can't be of type T, Property<T>, or Observable<anything but T>
    needThisOne: Observable<T>;
>needThisOne : Observable<T>
>Observable : Observable<T>
>T : T

    // Add more to make it slower
    expo1: Property<T[]>; //  0.31 seconds in check
>expo1 : Property<T[]>
>Property : Property<T>
>T : T

    expo2: Property<T[]>; //  3.11 seconds
>expo2 : Property<T[]>
>Property : Property<T>
>T : T

    expo3: Property<T[]>; // 82.28 seconds
>expo3 : Property<T[]>
>Property : Property<T>
>T : T
}
interface Property<T> extends Observable<T> { }
>Property : Property<T>
>T : T
>Observable : Observable<T>
>T : T

var p: Observable<{}>;
>p : Observable<{}>
>Observable : Observable<T>

var stuck: Property<number> = p;
>stuck : Property<number>
>Property : Property<T>
>p : Observable<{}>