wrongly transform function Infinity to 1/0

[hardfist]

Describe the bug

Infinity is wrongly transformed to 1/0

Input code

function Infinity(){
    console.log('xxx');
}
export default Infinity;

Config

{
  "jsc": {
    "parser": {
      "syntax": "ecmascript",
      "jsx": false
    },
    "target": "es5",
    "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
    }
  },
  "module": {
    "type": "es6"
  },
  "minify": false,
  "isModule": true
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.3.100&code=H4sIAAAAAAAAA0srzUsuyczPU%2FDMS8vMyyyp1NCs5lIAguT8vOL8nFS9nPx0DfWKigp1TWuuWq7UioL8ohKFlNS0xNKcErgmawCsssEKRwAAAA%3D%3D&config=H4sIAAAAAAAAA32US5LjIAyG932KlNe9nVnMAXo3Z6AICIc0Ri4k0nF15e4jY%2BcxHTk7W59%2BCSSh77fdrjuS6%2F7svuVTfkZbCMrtXyw0ZbZnsXTgBkuuxJG79ys90oyCTQTNdFlIx7b0wE1Fv1b3LiESXN1X2xBzDNNjQofDWIDowSZWiVcHyEz%2F61dW8GsGXOqjfY%2BYwOYXxFgyMTP0ULTADlOyI4E52aJEmU9qSyTUUsywMngzFhxVnn3kiFlyPlMP1huHHhQUCziOJ9BkkktkmeR6yn0a9rCvfd%2Ba%2FEMNJ5uqZSUnnFtL5LRK1ANGYhNq1kq4wI0aLHAt7k9lDKYA15KfdUeMeaMnnwBSgWSJsh1Ai9s8gszTljq8VMYcZGR5UrjMt3bLDL0U1cQYlMrOlYHCUetmAV8dzJV12nFWvFE%2Bih4MhCCzooSmr8juoCXlaQQMCpD%2B2qBN1QLM7RVu8PlBvMAfckvWB2z1GCwftilNwx7TiwQD8AH9CwdpBeM2LrIlzuM2r9mDjAZ41aVSA89LQB4Ao0ltWT7NhjwPiWj6hPv7mlgdLrclPNjc39%2F7soffVoduQF8bXDf83N9lL%2F%2Fu7k7XLXw7eBfp71XZkl7%2BAVPL6HotBgAA

SWC Info output

1.3.100

Expected behavior

don't turn to 1/0 like terser

function o(){console.log("xxx")}export default o;

Actual behavior

export default 1 / 0;

Version

1.3.100

Additional context

No response

[Austaras]

Declare unwritable and unconfigurable global variable in top level is a TypeError under strict mode which is implied by es module. I don't believe there's a "standard" way to deal with immediate runtime error, just like we ignore TDZ.

[magic-akari]

• related issue: undefined, NaN, and Infinity ident in decl is rewritten #8336

[Austaras]

#8336 is easily fixable -- just don't rename top level declaration. But this issue is not -- the correct semantic, ignoring that error, is 1/0.

[Austaras]

I was wrong. ESM top level var is not in global context, so they can safely shadow undefined/Infinity/NaN.

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.