Emitted__exportStar helper has missing ; which causes runtime error

[alan-agius4]

TypeScript Version: 3.9.1-rc

Search Terms:
__exportStar
export star

Code
Input

export *  from './test';

Output

var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __exportStar = (this && this.__exportStar) || function(m, exports) {
    for (var p in m) if (p !== "default" && !exports.hasOwnProperty(p)) __createBinding(exports, m, p);
} /* There is a missing semi-colon here */
(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports", "./test"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    __exportStar(require("./test"), exports);
});

When module target is configured UMD and helpers are emitted. The __exportStar unnamed function declaration has a missing ;, which causes an error during runtime Uncaught TypeError: (intermediate value)(…) is not a function

Expected behavior:
A semi-colon is added after the unnamed __exportStar function declaration.
Actual behavior:
A semi-colon is missing from the output which cause a runtime error.

Playground Link: https://www.typescriptlang.org/play/?module=3&ts=4.0.0-dev.20200511&ssl=2&ssc=18&pln=2&pc=1#code/KYDwDg9gTgLgBAKjgMyhAtnA5AOgPQzADOMWA3AFBA

[DanielRosenwasser]

Please port the change to tslib

[alan-agius4]

On it @DanielRosenwasser

[DanielRosenwasser]

Sorry, no, I didn't mean to ask you! Though I just made the change as well! 😅

[alan-agius4]

@DanielRosenwasser, I did the change to tslib microsoft/tslib#101 though that shouldn't have any effect, since it's not followed by immediate function call.

[DanielRosenwasser]

Thanks @alan-agius4!

[DanielRosenwasser]

Should be fixed now