ERR_UNKNOWN_FILE_EXTENSION is not thrown correctly

[targos]

Reproduction:

echo "import './test.unknown'" > test.mjs
touch test.unknown
node --experimental-modules test.mjs

$ node --experimental-modules test.mjs
(node:15096) ExperimentalWarning: The ESM module loader is experimental.
internal/modules/cjs/loader.js:815
      internalBinding('task_queue').triggerFatalException(
                                    ^

Error [ERR_INTERNAL_ASSERTION]: Code: ERR_UNKNOWN_FILE_EXTENSION; The provided arguments length (2) does not match the required ones (1).
This is caused by either a bug in Node.js or incorrect usage of Node.js internals.
Please open an issue with this stack trace at https://github.com/nodejs/node/issues

    at assert (internal/assert.js:13:11)
    at getMessage (internal/errors.js:284:3)
    at new NodeError (internal/errors.js:177:23)
    at Loader.resolve [as _resolve] (internal/modules/esm/default_resolve.js:101:13)
    at Loader.resolve (internal/modules/esm/loader.js:70:33)
    at Loader.getModuleJob (internal/modules/esm/loader.js:143:40)
    at ModuleWrap.<anonymous> (internal/modules/esm/module_job.js:43:40)
    at link (internal/modules/esm/module_job.js:42:36)

[devsnek]

cc @Fishrock123