minifier: incorrectly removes functions and classes used in for statements

[tmdghks]

Describe the bug

It appears that the minifier is incorrectly removing functions and classes that are reused within a for statement.
In the following example, both function x and class y are used inside for statements, and therefore should not be removed by the minifier. However, the minifier removes them, causing the code to break.

Input code

"use strict";
let k = function() {
    function x() {}
    class y{}
    for (x of ['']);
    for (y in ['']);
}();

Config

{
  "jsc": {
    "parser": {
      "syntax": "ecmascript",
      "jsx": false
    },
    "target": "es2022",
    "loose": false,
    "minify": {
      "compress": {
        "arguments": false,
        "arrows": true,
        "booleans": true,
        "booleans_as_integers": false,
        "collapse_vars": true,
        "comparisons": true,
        "computed_props": true,
        "conditionals": true,
        "dead_code": true,
        "directives": true,
        "drop_console": false,
        "drop_debugger": true,
        "evaluate": true,
        "expression": false,
        "hoist_funs": false,
        "hoist_props": true,
        "hoist_vars": false,
        "if_return": true,
        "join_vars": true,
        "keep_classnames": false,
        "keep_fargs": true,
        "keep_fnames": false,
        "keep_infinity": false,
        "loops": true,
        "negate_iife": true,
        "properties": true,
        "reduce_funcs": false,
        "reduce_vars": false,
        "side_effects": true,
        "switches": true,
        "typeofs": true,
        "unsafe": false,
        "unsafe_arrows": false,
        "unsafe_comps": false,
        "unsafe_Function": false,
        "unsafe_math": false,
        "unsafe_symbols": false,
        "unsafe_methods": false,
        "unsafe_proto": false,
        "unsafe_regexp": false,
        "unsafe_undefined": false,
        "unused": true,
        "const_to_let": true,
        "pristine_globals": true
      },
      "mangle": false
    },
    "externalHelpers": true
  },
  "module": {
    "type": "es6"
  },
  "minify": false,
  "isModule": false
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.7.14&code=H4sIAAAAAAAAA1MqLU5VKC4pykwuUbLmykktUchWsFVIK81LLsnMz9PQVKjmUgACmIBCBUioFiyWnJNYXKxQCeWl5RcpaFQo5KcpRKurx2paIwQrFTLzYIK1GprWAH7VDnNzAAAA&config=H4sIAAAAAAAAA32VO5LbMAyG%2B5zCozpFxkWKHCCzTc7AoUlQppcPDQF6rdnx3QNR8mPXkDoLH36ABED488du153QdH92n%2FyTPwZdEMr9my04JtIXtnRgokZT%2FEDdzxs94YScDgjNdJ1JR7r0QE2F%2B1%2F7%2FaLoQs4IN8Viiz55Nz7nNDkOBRCfbGzlkDVCIvyqX1jJHxOgUp%2Fth5wD6LRBlEblE0EPRQpscgh6QFBnXYQo00l18ZilFBOsBFYNJQ8iT9aTz4lzvlIL2iqTLQjIFzDkzyDJOBfLEvL1hPs0bOFQ%2B771%2BZsazjpUTUJOuLSW8GmFqMfskZSrSSrhDFdqMMOluN%2BV3qkCVEt61Z2yTys9eQfgCgSNmHQEKW7zcDxPa2q3qfTJ8cjSKHCeb%2BmWCXouqvLeCZWdKgOFvNTNArYamCprpOMseKV86C0ocI5nRQiNH57MUUpK4wDZCYD7q500VTNQ91e4wqcHsYH%2F8i1JHrDFI2o6rlMc4yGHjQQR6JjthgO3gvI6LrwlLsM6r8kCjwZY0aViA69LgB8AZRXavnyZDX4eHFH1IR8ea2JxuN73cNSpf7z3L6sYLgSFV8wbhAHKU4Tm0MVsa1Mu%2FwBT8%2Be9%2Fbt7ON1W9P1Wncd%2FN%2BWc8%2FofsXtHPU4GAAA%3D

SWC Info output

No response

Expected behavior

"use strict";
let k = function() {
	function x() {} // These should be preserved
	class y{}      // These should be preserved 
	for (x of ['']);
	for(y in ['']);
}();

Actual behavior

"use strict";
let k = function() {
    for (x of [
        ''
    ]);
    for(y in [
        ''
    ]);
}();

Version

1.7.14

Additional context

No response

[swc-bot]

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