If a user issue this command emerge -pvu -deep world then portage should report error in command line parameters as user forgot an dash(-) before deep. Portage instead returns some verbose/debug output. So far when we call non existing emerge switch as emerge -r mozilla portage returns: !!! Error: -r is an invalid short action or option. On the other hand non existing option as emerge --real mozilla returns: !!! Error: --real is an invalid option. Tried emerge -pretend mozilla but it is ok with emerge output. This -deep is kinda special? Seems emerge interprets it as first letter of --debug option (that has (-d) short)? Reproducible: Always Steps to Reproduce: 1. 2. 3.
*** This bug has been marked as a duplicate of 80752 ***