I am not searching to produce custom error pages, but to really problem error messages once the config file is parsed. Particularly, I wish to make use of an to provide a mistake when the module has not been loaded, therefore it is simpler to debug.

This is actually the only kludgy factor I possibly could think about (as well as mod_rewrite enabled):

<IfModule !mod_deflate.c>
        ErrorDocument 500 "mod_deflate isn't available"
        RewriteEngine On
        RewriteRule .* - [R=500]
</IfModule>

If you discover an easy method to 'trigger' errors, I am certainly interested )