tsserver: completion for union type of literal and string is broken from 2.1

[wonderful-panda]

TypeScript Version: 2.1.1

Code

type Test = "foo" | "bar" | string;
const x: Test = "/* CURSOR POSITION */";

Expected behavior:
tsserver returns "foo" and "bar" as completion candidates.

Actual behavior:
2.0.10 behaves as expected.
2.1.1 returns no candidates.

The type "foo" | "bar" | string is equivalent to the string type and now gets simplified early on. So all we see when querying the type checker for the type of x is string. So, this can't be fixed.

[oldrich-s]

@Andy-MS combobox is equivalent to input text field? Why do people use comboboxes then? This is what happens when math purity gets precedence to usability...