Yesterday I accidentally forgot to add the alias name to the /alias command and ended up having /input aliased.
As a result, I was unable to enter any command, as the enter key of course does a /input return

I had to resort to fifo to unalias /input.

I would suggest preventing /input to be aliased, or at the very least always handle /input enter internally.
Another idea would be to have ctrl-M (enter) be bound by default to /command core input return

This bug is similar to: https://savannah.nongnu.org/bugs/index.php?36290