=== tests/cases/conformance/es6/destructuring/iterableArrayPattern20.ts ===
function fun(...[[a = new Foo], b = [new Foo]]: Bar[][]) { }
>fun : (...[[a = new Foo], b = [new Foo]]: Bar[][]) => void, Symbol(fun, Decl(iterableArrayPattern20.ts, 0, 0))
>a : Bar, Symbol(a, Decl(iterableArrayPattern20.ts, 0, 18))
>new Foo : Foo
>Foo : typeof Foo, Symbol(Foo, Decl(iterableArrayPattern20.ts, 2, 15))
>b : Bar[], Symbol(b, Decl(iterableArrayPattern20.ts, 0, 31))
>[new Foo] : Foo[]
>new Foo : Foo
>Foo : typeof Foo, Symbol(Foo, Decl(iterableArrayPattern20.ts, 2, 15))
>Bar : Bar, Symbol(Bar, Decl(iterableArrayPattern20.ts, 1, 29))

fun(...new FooArrayIterator);
>fun(...new FooArrayIterator) : void
>fun : (...[[a = new Foo], b = [new Foo]]: Bar[][]) => void, Symbol(fun, Decl(iterableArrayPattern20.ts, 0, 0))
>...new FooArrayIterator : Foo[]
>new FooArrayIterator : FooArrayIterator
>FooArrayIterator : typeof FooArrayIterator, Symbol(FooArrayIterator, Decl(iterableArrayPattern20.ts, 3, 27))

class Bar { x }
>Bar : Bar, Symbol(Bar, Decl(iterableArrayPattern20.ts, 1, 29))
>x : any, Symbol(x, Decl(iterableArrayPattern20.ts, 2, 11))

class Foo extends Bar { y }
>Foo : Foo, Symbol(Foo, Decl(iterableArrayPattern20.ts, 2, 15))
>Bar : Bar, Symbol(Bar, Decl(iterableArrayPattern20.ts, 1, 29))
>y : any, Symbol(y, Decl(iterableArrayPattern20.ts, 3, 23))

class FooArrayIterator {
>FooArrayIterator : FooArrayIterator, Symbol(FooArrayIterator, Decl(iterableArrayPattern20.ts, 3, 27))

    next() {
>next : () => { value: Foo[]; done: boolean; }, Symbol(next, Decl(iterableArrayPattern20.ts, 4, 24))

        return {
>{            value: [new Foo],            done: false        } : { value: Foo[]; done: boolean; }

            value: [new Foo],
>value : Foo[], Symbol(value, Decl(iterableArrayPattern20.ts, 6, 16))
>[new Foo] : Foo[]
>new Foo : Foo
>Foo : typeof Foo, Symbol(Foo, Decl(iterableArrayPattern20.ts, 2, 15))

            done: false
>done : boolean, Symbol(done, Decl(iterableArrayPattern20.ts, 7, 29))
>false : boolean

        };
    }

    [Symbol.iterator]() {
>Symbol.iterator : symbol, Symbol(SymbolConstructor.iterator, Decl(lib.d.ts, 1236, 31))
>Symbol : SymbolConstructor, Symbol(Symbol, Decl(lib.d.ts, 1186, 52), Decl(lib.d.ts, 1262, 11))
>iterator : symbol, Symbol(SymbolConstructor.iterator, Decl(lib.d.ts, 1236, 31))

        return this;
>this : FooArrayIterator, Symbol(FooArrayIterator, Decl(iterableArrayPattern20.ts, 3, 27))
    }
}