Package: devscripts Version: 2.17.11This is what happens when bts(1) attempts to use a mail reader that doesn't exist:
$ bts --mailreader='moo %s' show --mbox 123456 sh: 1: moo: not found Problem running mail reader: Inappropriate ioctl for device The error message "Inappropriate ioctl for device" doesn't make sense. -- Jakub Wilk

