TypeScript version: 2.3 (Playground)

Code

function foo(x: "bla"): void;
function foo(x: "bla"): void;
function foo(x: string) {}
foo("|");

Expected behavior:
At position |, autocomplete should suggest bla once.

Actual behavior:
Autocompletion suggests bla twice:

Relevance
In the example above, duplication might not be a big deal. But when having multiple overloadings (maybe some with this restrictions to select a return type) or many items to complete, autocomplete gets messy: