[bug] collapse_vars produces broken esm output

[TrySound]

Bug report or Feature request?
bug

Version (complete output of terser -V)

terser 3.17.0

Complete CLI command or minify() options used

$ yarn terser file.js --compress --toplevel

terser input

function shortOut() {
  return function() {};
}

var setToString = shortOut();

var _setToString = setToString;

export function baseRest() {
  return _setToString();
}

export { _setToString };

terser prettified result

var _setToString,
  setToString = function() {};
export function baseRest() {
  return _setToString();
}
export { setToString as _setToString };

Expected result

var setToString = function() {};
export function baseRest() {
  return setToString();
}
export { setToString as _setToString };

[L2jLiga]

After investigations seems like this issue gone when module: true or toplevel: true

command: terser issue-333.js -c --module (or terser issue-333.js -c --toplevel)

input: same

output:

var _setToString = function () {};

export function baseRest() {
    return _setToString();
}

export { _setToString };

[TrySound]

@L2jLiga Is it master or latest published version? I still get broken output with latest version.

[L2jLiga]

I checked it on master branch, I guess (I have to recheck on which branch I was)

[L2jLiga]

Hmm, I was wrong.. I took input from #343 and it's work with module: true but given in this issue example does not

[TrySound]

I guess I oversimplified test

[L2jLiga]

That's it: #388