JS minify produces broken code

[jmooring]

Input

var a = 1;
function f() {
  return 1;
}
var { min, max } = Math;
function g() {
  return 2;
}

Output

var a=1,min,max;function f(){return 1}{min,max}=Math;function g(){return 2}

Reference (https://jscompress.com)

var a=1;function f(){return 1}var{min:min,max:max}=Math;function g(){return 2}

This is not a new issue. I tested 2.9.10 - 2.9.22. Only 2.9.21 was different (very different).

[tdewolff]

This bug has been confirmed, working on a fix!

[tdewolff]

Still working on the fix, it is quite complex as it requires some restructuring of the code. I use the opportunity to push through related improvements for minification.

[tdewolff]

The shortest output should be

a=1;function f(){return 1}var{min,max}=Math,a;function g(){return 2}

[tdewolff]

I've pushed out a fix for your issue, and besides fixing a bug most benchmark targets get smaller still (improved minification). Unfortunately this comes at a 2% cost in time. Only complex (array or object) variable declarations don't get merged yet. Hopefully that gets fixed as soon as it is supported.

In the meanwhile, if you can please test the patch to see if your JS still runs as expected.