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Unicode characters are not properly parsed from NODE_OPTIONS on Windows

  • Version: verified on 14.5.0 / 12.14.1 / 10.15.2
  • Platform: Windows 1909
  • Subsystem:

What steps will reproduce the bug?

  1. Create a file foó.js containing console.log("in foó");, and an bar.js with console.log("in bar");
  2. Create a file index.js containing
require('child_process').spawn('node', ['bar.js'], {
  cwd: __dirname,
  env: { HELLO: 'cónnór', NODE_OPTIONS: '--require "./foó.js"' },
  stdio: 'inherit'
})
  1. Run index.js

How often does it reproduce? Is there a required condition?

Every time

What is the expected behavior?

Output like:

> node index.js
in foo
in bar

What do you see instead?

> node index.js
internal/modules/cjs/loader.js:796
    throw err;
    ^

Error: Cannot find module './fo�.js'
Require stack:
- internal/preload
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:793:17)
    at Function.Module._load (internal/modules/cjs/loader.js:686:27)
    at Module.require (internal/modules/cjs/loader.js:848:19)
    at Module._preloadModules (internal/modules/cjs/loader.js:1133:12)
    at loadPreloadModules (internal/bootstrap/pre_execution.js:443:5)
    at prepareMainThreadExecution (internal/bootstrap/pre_execution.js:62:3)
    at internal/main/run_main_module.js:7:1 {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ 'internal/preload' ]
}

Additional information

  • This does work Linux and OSX
  • This happens irrespective of setting shell: true/false in spawn()
  • I seem to be able to pass unicode characters through other variables and read them, e.g. console.log(process.env.HELLO) in the above example prints out fine
  • For kicks I tried replacing the accented character with \\\\xF3, but it doesn't look like Node tries to parse these from the string.

References: microsoft/vscode-js-debug#563