deprecated_msg in primops.txt.pp does not produce deprecation warnings

Summary

Some values defined in primops.txt.pp have a message that marks them as deprecated, in the deprecated_msg field. An example is void#. However, when compiling modules using any of these, like

{-# LANGUAGE MagicHash, UnboxedTuples #-}

import GHC.Exts

main = case void# of (# #) -> print "hm"

no deprecation warning appears.

Environment

• GHC version used: 9.3.20210802

Optional:

• Operating System: Arch Linux
• System Architecture: x86_64