ES6 module immediately exported var clash with local "exports" variable

TypeScript Version: 3.5.1 (playground), 3.5.3

Search Terms:
es6 module exports object scope declare declaration overwrite

Code

export const a = 1
function b () {
    const exports = 2
    console.log(a)
}
b()

Expected behavior:
output from babel with es2015 preset
https://babeljs.io/repl#?babili=false&browsers=&build=&builtIns=false&spec=false&loose=false&code_lz=KYDwDg9gTgLgBAYwgOwM7wIZwLxwIwBQAZgK7IIwCWKcARnABQCUcA3gXJ4iunKJLFQ44AJg5ckaCABtgAOmkQA5gwxMCAXwK1mQA&debug=false&forceAllTransforms=false&shippedProposals=false&circleciRepo=&evaluate=false&fileSize=false&timeTravel=false&sourceType=module&lineWrap=false&presets=es2015&prettier=false&targets=&version=7.5.5&externalPlugins=

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.a = void 0;
var a = 1;
exports.a = a;

function b() {
  var exports = 2;
  console.log(a);
}

b();

Actual behavior:
console.log is referencing the local exports.a instead of the global const a

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.a = 1;
function b() {
    var exports = 2;
    console.log(exports.a);
}
b();

However, if I split the export const into two, it will work.

const a = 1
export { a }

Playground Link:
http://www.typescriptlang.org/play/?target=1#code/KYDwDg9gTgLgBAYwgOwM7wIZwLxwIwCwAUAGYCuyCMAlinAEZwAUAlHAN7FzeIrpyhIsVDjgAmLjyRoIAG2AA6WRADmTDC2IBfYvVZA

Related Issues: can't find

Reproduisez le code fourni dans le TypeScript playground et comparez le JavaScript généré avec la sortie de Babel liée dans l’issue. Suivez le traitement d’une variable exportée immédiatement et de la liaison locale imbriquée exports ; le travail est terminé lorsque le console.log généré référence toujours la valeur au niveau du module plutôt que la liaison locale.