Inconsistent compressing about redeclaration variables

[kevinptt0323]

Bug report or feature request?

Bug report

ES5 or ES6+ input?

ES5

Uglify version (uglifyjs -V)

uglify-js 3.0.28

JavaScript input

function foo(o) {
    var bar = o.a;
    for (var i=0; i<0; i++);
    for (var i=0; i<0; i++);
}

The uglifyjs CLI command executed or minify() options used.

uglify in.js -c -b -o out.js

JavaScript output or error produced.

function foo(o) {
    o.a;
    for (f = 0;; f < 0; f++) ;
    for (var f = 0; f < 0; f++) ;
}

There are two consecutive semicolons in the first for-loop.

[alexlamsl]

@kevinptt0323 thanks for the clear & concise report 👍