Hitting the "delete" key on a Mac computer will not erase the previous
character entered into pinentry-curses. It will not even back the
cursor up.
This makes pinentry-curses pretty much unusable on OSX. You have to get
your password right.
This is pinentry 0.9.4, though I believe it happens at least in 0.9.3
and 0.9.2 as well.
This is reproducible by multiple users on multiple machines[1], with
multiple terminal programs (Terminal.app, iTerm2.app).
Mine is OSX 10.10.3.
[1] For example: https://github.com/Homebrew/homebrew/issues/40335