Unclosed object binding patterns do not give correct completions

[DanielRosenwasser]

Now that #3615 is in, here's an annoying one for editors without brace completion:

interface Thing {
    abcdef: any;
}

interface I {
    property1: Thing;
    property2: string;
}
var foo: I;
var { property1: { /**/ } = foo;

Expected: abcdef is in the completion list.
Actual: property1 and property2 are in the completion list.

[mhegazy]

This is a hard one to get right just because of the grammar.

[DanielRosenwasser]

Right - this shouldn't be a bug. I forgot that an initializer is valid on a nested binding pattern.