TypeScript Version: 2.3.4

Code

// foo.ts
console.log(BAR);
import {BAR} from './bar';

// bar.ts
export const BAR = 'bar';

// tsconfig.json
{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "strict": true
  }
}

Expected behavior:

TypeScript should reject foo.ts, because it is referring to BAR before it is initialized.

Actual behavior:

tsc raises no errors, and generates the following foo.js file:

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
console.log(bar_1.BAR);
var bar_1 = require("./bar");

This fails at runtime with a TypeError.