=== tests/cases/conformance/es6/yieldExpressions/generatorTypeCheck19.ts ===
class Foo { x: number }
>Foo : Symbol(Foo, Decl(generatorTypeCheck19.ts, 0, 0))
>x : Symbol(x, Decl(generatorTypeCheck19.ts, 0, 11))

class Bar extends Foo { y: string }
>Bar : Symbol(Bar, Decl(generatorTypeCheck19.ts, 0, 23))
>Foo : Symbol(Foo, Decl(generatorTypeCheck19.ts, 0, 0))
>y : Symbol(y, Decl(generatorTypeCheck19.ts, 1, 23))

function* g(): IterableIterator<Foo> {
>g : Symbol(g, Decl(generatorTypeCheck19.ts, 1, 35))
>IterableIterator : Symbol(IterableIterator, Decl(lib.d.ts, 4373, 1))
>Foo : Symbol(Foo, Decl(generatorTypeCheck19.ts, 0, 0))

    yield;
    yield * [new Bar];
>Bar : Symbol(Bar, Decl(generatorTypeCheck19.ts, 0, 23))
}