Crash when using NODE_OPTIONS=--experimental-specifier-resolution=node with some .bin executables

[daveisfera]

• Version: 14.13.0
• Platform: macOS 10.15.6
• Subsystem:

What steps will reproduce the bug?

NODE_OPTIONS=--experimental-specifier-resolution=node node_modules/.bin/semver --version

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

100%

What is the expected behavior?

Runs just like when NODE_OPTIONS isn't set

What do you see instead?

This error:

internal/process/esm_loader.js:74
    internalBinding('errors').triggerUncaughtException(
                              ^

TypeError [ERR_INVALID_RETURN_PROPERTY_VALUE]: Expected string to be returned for the "format" from the "loader getFormat" function but got type object.
    at Loader.getFormat (internal/modules/esm/loader.js:110:13)
    at async Loader.getModuleJob (internal/modules/esm/loader.js:230:20)
    at async Loader.import (internal/modules/esm/loader.js:164:17)
    at async Object.loadESM (internal/process/esm_loader.js:68:5) {
  code: 'ERR_INVALID_RETURN_PROPERTY_VALUE'
}

Additional information

Also happens with he, mocha, node-which, and tsc

[targos]

I can't reproduce it on Linux.

[sionzee]

I have the same issue but started happening on 14.13.1 and not 14.13.0 which was working fine.

// Edit
In my case it is with ts-node.

[sionzee]

I think this error is happening due changes with esm-loader and is not related to NODE_OPTIONS.

@daveisfera Can I ask to confirm if this really began happening on 14.13.0?
Just if my theory is right :)

If you are right then I must create another issue.

[daveisfera]

I just tested with semver with 14.12.0 and it ran with no output, but mocha gave the same error, so I believe that it happened at least some of the time before 14.13.0

[targos]

I can reproduce now with:

> npm i semver
> NODE_OPTIONS=--experimental-specifier-resolution=node node_modules/.bin/semver
node:internal/process/esm_loader:74
    internalBinding('errors').triggerUncaughtException(
                              ^

TypeError [ERR_INVALID_RETURN_PROPERTY_VALUE]: Expected string to be returned for the "format" from the "loader getFormat" function but got type object.
    at new NodeError (node:internal/errors:278:15)
    at Loader.getFormat (node:internal/modules/esm/loader:111:13)
    at async Loader.getModuleJob (node:internal/modules/esm/loader:231:20)
    at async Loader.import (node:internal/modules/esm/loader:165:17)
    at async Object.loadESM (node:internal/process/esm_loader:68:5) {
  code: 'ERR_INVALID_RETURN_PROPERTY_VALUE'
}

@nodejs/modules

[Norbo11]

Also seeing this when running mocha via node v14.13.1, Mac OSX 10.15.1. Running the same command under my Ubuntu VM works fine.

[sosoba]

It's not a bug but planing feature. See https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V13.md
[aa26662] - module: drop support for extensionless main entry points in esm (Geoffrey Booth) #31415
[ca81af7] - module: correct docs about when extensionless files are supported (Geoffrey Booth) #31415