=== tests/cases/compiler/genericClasses4.ts ===
// once caused stack overflow
class Vec2_T<A>
>Vec2_T : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>A : A, Symbol(A, Decl(genericClasses4.ts, 1, 13))
{
    constructor(public x: A, public y: A) { }
>x : A, Symbol(x, Decl(genericClasses4.ts, 3, 16))
>A : A, Symbol(A, Decl(genericClasses4.ts, 1, 13))
>y : A, Symbol(y, Decl(genericClasses4.ts, 3, 28))
>A : A, Symbol(A, Decl(genericClasses4.ts, 1, 13))

    fmap<B>(f: (a: A) => B): Vec2_T<B> {
>fmap : <B>(f: (a: A) => B) => Vec2_T<B>, Symbol(fmap, Decl(genericClasses4.ts, 3, 45))
>B : B, Symbol(B, Decl(genericClasses4.ts, 4, 9))
>f : (a: A) => B, Symbol(f, Decl(genericClasses4.ts, 4, 12))
>a : A, Symbol(a, Decl(genericClasses4.ts, 4, 16))
>A : A, Symbol(A, Decl(genericClasses4.ts, 1, 13))
>B : B, Symbol(B, Decl(genericClasses4.ts, 4, 9))
>Vec2_T : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>B : B, Symbol(B, Decl(genericClasses4.ts, 4, 9))

        var x:B = f(this.x);
>x : B, Symbol(x, Decl(genericClasses4.ts, 5, 11))
>B : B, Symbol(B, Decl(genericClasses4.ts, 4, 9))
>f(this.x) : B
>f : (a: A) => B, Symbol(f, Decl(genericClasses4.ts, 4, 12))
>this.x : A, Symbol(x, Decl(genericClasses4.ts, 3, 16))
>this : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>x : A, Symbol(x, Decl(genericClasses4.ts, 3, 16))

        var y:B = f(this.y);
>y : B, Symbol(y, Decl(genericClasses4.ts, 6, 11))
>B : B, Symbol(B, Decl(genericClasses4.ts, 4, 9))
>f(this.y) : B
>f : (a: A) => B, Symbol(f, Decl(genericClasses4.ts, 4, 12))
>this.y : A, Symbol(y, Decl(genericClasses4.ts, 3, 28))
>this : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>y : A, Symbol(y, Decl(genericClasses4.ts, 3, 28))

        var retval: Vec2_T<B> = new Vec2_T(x, y);
>retval : Vec2_T<B>, Symbol(retval, Decl(genericClasses4.ts, 7, 11))
>Vec2_T : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>B : B, Symbol(B, Decl(genericClasses4.ts, 4, 9))
>new Vec2_T(x, y) : Vec2_T<B>
>Vec2_T : typeof Vec2_T, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>x : B, Symbol(x, Decl(genericClasses4.ts, 5, 11))
>y : B, Symbol(y, Decl(genericClasses4.ts, 6, 11))

        return retval;
>retval : Vec2_T<B>, Symbol(retval, Decl(genericClasses4.ts, 7, 11))
    }
    apply<B>(f: Vec2_T<(a: A) => B>): Vec2_T<B> {
>apply : <B>(f: Vec2_T<(a: A) => B>) => Vec2_T<B>, Symbol(apply, Decl(genericClasses4.ts, 9, 5))
>B : B, Symbol(B, Decl(genericClasses4.ts, 10, 10))
>f : Vec2_T<(a: A) => B>, Symbol(f, Decl(genericClasses4.ts, 10, 13))
>Vec2_T : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>a : A, Symbol(a, Decl(genericClasses4.ts, 10, 24))
>A : A, Symbol(A, Decl(genericClasses4.ts, 1, 13))
>B : B, Symbol(B, Decl(genericClasses4.ts, 10, 10))
>Vec2_T : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>B : B, Symbol(B, Decl(genericClasses4.ts, 10, 10))

        var x:B = f.x(this.x);
>x : B, Symbol(x, Decl(genericClasses4.ts, 11, 11))
>B : B, Symbol(B, Decl(genericClasses4.ts, 10, 10))
>f.x(this.x) : B
>f.x : (a: A) => B, Symbol(Vec2_T.x, Decl(genericClasses4.ts, 3, 16))
>f : Vec2_T<(a: A) => B>, Symbol(f, Decl(genericClasses4.ts, 10, 13))
>x : (a: A) => B, Symbol(Vec2_T.x, Decl(genericClasses4.ts, 3, 16))
>this.x : A, Symbol(x, Decl(genericClasses4.ts, 3, 16))
>this : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>x : A, Symbol(x, Decl(genericClasses4.ts, 3, 16))

        var y:B = f.y(this.y);
>y : B, Symbol(y, Decl(genericClasses4.ts, 12, 11))
>B : B, Symbol(B, Decl(genericClasses4.ts, 10, 10))
>f.y(this.y) : B
>f.y : (a: A) => B, Symbol(Vec2_T.y, Decl(genericClasses4.ts, 3, 28))
>f : Vec2_T<(a: A) => B>, Symbol(f, Decl(genericClasses4.ts, 10, 13))
>y : (a: A) => B, Symbol(Vec2_T.y, Decl(genericClasses4.ts, 3, 28))
>this.y : A, Symbol(y, Decl(genericClasses4.ts, 3, 28))
>this : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>y : A, Symbol(y, Decl(genericClasses4.ts, 3, 28))

        var retval: Vec2_T<B> = new Vec2_T(x, y);
>retval : Vec2_T<B>, Symbol(retval, Decl(genericClasses4.ts, 13, 11))
>Vec2_T : Vec2_T<A>, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>B : B, Symbol(B, Decl(genericClasses4.ts, 10, 10))
>new Vec2_T(x, y) : Vec2_T<B>
>Vec2_T : typeof Vec2_T, Symbol(Vec2_T, Decl(genericClasses4.ts, 0, 0))
>x : B, Symbol(x, Decl(genericClasses4.ts, 11, 11))
>y : B, Symbol(y, Decl(genericClasses4.ts, 12, 11))

        return retval;
>retval : Vec2_T<B>, Symbol(retval, Decl(genericClasses4.ts, 13, 11))
    }
}