Describe the bug
I have a piece of code that uses regexp to get keys and values，if i use this plugin（Babel-minify），i get an endless loop of code，but if i use terser， i can get the right code

To Reproduce
Minimal code to reproduce the bug

parseQuery = function (query) {
    // input "a=1&b=2"
    // output: {a: "1", b: "2"}
    query = query.replace(/\?/g, '');
    var reg = /([^=&\s]+)[=\s]*([^&\s]*)/g;
    var obj = {};

    while (reg.exec(query)) {
      obj[RegExp.$1] = RegExp.$2;
    }

    return obj;
};

Actual Output

parseQuery = function (a) {
    a = a.replace(/\?/g, "");
    for (var b = {};
        /([^=&\s]+)[=\s]*([^&\s]*)/g.exec(a);) b[RegExp.$1] = RegExp.$2;
    return b
};

if i input use parseQuery("a=1&b=2"), this is an endless loop that causes the page to get stuck

Expected Output
if i use terser

parseQuery = function (e) {
    e = e.replace(/\?/g, "");
    for (var r = /([^=&\s]+)[=\s]*([^&\s]*)/g, g = {}; r.exec(e);) g[RegExp.$1] = RegExp.$2;
    return g
};

input parseQuery("a=1&b=2"), i can get {a: "1", b: "2"} successfully
Configuration

How are you using babel-minify?

i use babel-minify CLI in global

npm install babel-minify -g
minify index.js -d lib

Additional context
i also use terser in global, but can get right code, It runs normally in the browser

npm install terser -g
terser --compress --mangle -- index.js