Steps required to reproduce the problem

1. Create composer project without required params (e.g. name)
2. Execute composer normalize -v

Expected Result

• Expected get error that required param "name" is missing in composer.json.

Actual Result

• Original JSON is not valid according to schema "phar:///usr/local/bin/composer/src/Composer/Json/../../../res/composer-schema.json".

Would be nice to improve DX by expicitly warn what wrong with actual composer.