Incomplete commands run through aliases don't produce errors

The bug

Some commands have aliases, such as /xp, which is an alias for /experience. An error is normally shown when running a command that doesn't include all the required parameters. However, when running a command through an alias, those error messages don't show, providing the user with no feedback about what they have done wrong.

Steps to reproduce

Run the following command:

/xp query @s

Expected behaviour

A red "unknown or incomplete command" error would be shown

Observed behaviour

No error is produced

Screenshots

Notes

• A fix for the issue has been provided by zly2006, who has submitted it as a PR to the Mojang/brigadier repository.