TypeScript Version: 3.3.0-dev.20181121

Search Terms: js, javascript, A rest parameter must be of an array type

Code

//@ts-check
/** @type {(...bar: string[]) => void} */
function foo(...bar) {}

Expected behavior:
Doesn't report any errors. Type of bar parameter is string[].

Actual behavior:

asdf.js:3:14 - error TS2370: A rest parameter must be of an array type.

3 function foo(...bar) {}
               ~~~~~~

Found 1 error.

VS Code intellisense shows bar is string instead of string[].

TypeScript 3.0.3 works as expected, 3.1.1 and later versions don't.