ufuzz failure

[alexlamsl]

// original code
// (beautified)
var _calls_ = 10, a = 100, b = 10, c = 0;

{
    var let_2;
    {
        var expr3 = [].next;
        for (var key3 in expr3) {
            c = 1 + c;
            let arguments = expr3[key3];
            {
                var undefined;
            }
        }
    }
}

{
    var brake6 = 5;
    do {
        --b + (a++ + (3 in [ -((a = (false != null) % (1 == 24..toString())) != ((a && (a[c = 1 + c, 
        +(-4 % "a" > 1 / "a")] &= [ , 0 ].length === 2 == "function")) & [] == ([ , 0 ].length === 2))), {
            3: a && a.a,
            value: a++ + (("object" <= "bar") << (Infinity != 1) && (a && (a.then = (NaN, 
            false) === (true && 4))))
        }.length, (this === ([ , 0 ].length === 2) != undefined * 25, "object" <= NaN || (undefined || -5)) ]) || a || 3).toString();
    } while (a && --brake6 > 0);
}

for (var brake8 = 5; --b + ((c = c + 1) + function(async_1) {
    L29891: for (var brake9 = 5; (c = c + 1) + (0 === 1 ? a : b) && brake9 > 0; --brake9) {}
}() ? /[abc4]/g.exec((a++ + a-- || b || 5).toString()) : --b + (typeof f1 == "function" && --_calls_ >= 0 && f1(2))) && brake8 > 0; --brake8) {
    (c = c + 1) + {
        var: a && typeof a.c == "function" && --_calls_ >= 0 && a.c(delete b),
        undefined: --b + void (a && (a.undefined = (4 ^ undefined) > ([], 4) && (-1 == import.meta) >= -4 + null)),
        1.5: typeof f1 == "function" && --_calls_ >= 0 && f1(null, (c = c + 1) + (typeof f1 == "function" && --_calls_ >= 0 && f1(Infinity, 5)), -2)
    }.undefined;
}

console.log(null, a, b, c, Infinity, NaN, undefined);

// uglified code
// (beautified)
var t, n = 10, f = 100, o = 10, e = 0, i = [].next;

for (t in i) {
    e = 1 + e;
    let arguments = i[t], n;
}

for (var c = 5; --o, (f++ + (3 in [ -((f = !0 % (1 == 24..toString())) != ((f && (f[e = 1 + e, 
0] &= 2 === [ , 0 ].length == "function")) & [] == (2 === [ , 0 ].length))), {
    3: f && f.a,
    value: f++ + (!1 << (1 != Infinity) && f && (f.then = 4 === (NaN, !1)))
}.length, "object" <= NaN || -5 ]) || f || 3).toString(), f && 0 < --c; ) {}

for (var l = 5; --o + ((e += 1) + function() {
    for (var n = 5; (e += 1) + o && 0 < n; --n) {}
}() ? /[abc4]/g.exec((f++ + f-- || o || 5).toString()) : --o + ("function" == typeof f1 && 0 <= --n && f1(2))) && 0 < l; --l) {
    e += 1, f && "function" == typeof f.c && 0 <= --n && f.c(delete o), --o, f && (f.undefined = !1), 
    "function" == typeof f1 && 0 <= --n && f1(null, (e += 1) + ("function" == typeof f1 && 0 <= --n && f1(Infinity, 5)), -2);
}

console.log(null, f, o, e, Infinity, NaN, h);

original result:
null NaN -8 47 Infinity NaN undefined

uglified result:
evalmachine.<anonymous>:2
var t,n=10,f=100,o=10,e=0,i=[].next;for(t in i){e=1+e;let arguments=i[t],n}for(var c=5;--o,(f+++(3 in[-((f=!0%(1==24..toString()))!=((f&&(f[e=1+e,0]&=2===[,0].length=="function"))&[]==(2===[,0].length))),{3:f&&f.a,value:f+++(!1<<(1!=Infinity)&&f&&(f.then=4===(NaN,!1)))}.length,"object"<=NaN||-5])||f||3).toString(),f&&0<--c;);for(var l=5;--o+((e+=1)+function(){for(var n=5;(e+=1)+o&&0<n;--n);}()?/[abc4]/g.exec((f+++f--||o||5).toString()):--o+("function"==typeof f1&&0<=--n&&f1(2)))&&0<l;--l)e+=1,f&&"function"==typeof f.c&&0<=--n&&f.c(delete o),--o,f&&(f.undefined=!1),"function"==typeof f1&&0<=--n&&f1(null,(e+=1)+("function"==typeof f1&&0<=--n&&f1(Infinity,5)),-2);console.log(null,f,o,e,Infinity,NaN,h);
                                                                                                                                                                                                                                                                                               

ReferenceError: h is not defined
    at evalmachine.<anonymous>:2:706
    at evalmachine.<anonymous>:3:3
    at ContextifyScript.Script.runInContext (vm.js:59:29)
    at Object.runInContext (vm.js:120:6)
    at run_code_vm (/home/runner/work/UglifyJS/UglifyJS/test/sandbox.js:263:12)
    at Object.exports.run_code (/home/runner/work/UglifyJS/UglifyJS/test/sandbox.js:36:38)
    at run_code (/home/runner/work/UglifyJS/UglifyJS/test/ufuzz/index.js:2122:20)
    at /home/runner/work/UglifyJS/UglifyJS/test/ufuzz/index.js:2577:29
    at Array.forEach (<anonymous>)
    at Object.<anonymous> (/home/runner/work/UglifyJS/UglifyJS/test/ufuzz/index.js:2564:20)

// reduced test case (output will differ)

// (beautified)
{
    let arguments;
    var undefined;
}

undefined;

0(undefined);
// output: TypeError: 0 is not a function
// minify: ReferenceError: a is not defined
// options: {
//   "ie": true,
//   "module": false,
//   "toplevel": true,
//   "mangle": {
//     "v8": true
//   },
//   "output": {
//     "v8": true
//   },
//   "validate": true
// }

minify(options):
{
  "ie": true,
  "module": false,
  "toplevel": true,
  "mangle": {
    "v8": true
  },
  "output": {
    "v8": true
  }
}

Suspicious compress options:
  join_vars
  reduce_vars
  toplevel

Suspicious options:
  rename
  toplevel