Package: dash Version: 0.5.8-2 Severity: minor $ dash -c '/nonexistent' moo moo: 1: moo: /nonexistent: not found
Note that the message contains $0 ("moo") twice, for no apparent reason. For comparison, bash prints $0 only once in the same situation:
$ bash -c '/nonexistent' moo moo: /nonexistent: No such file or directory -- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (990, 'unstable'), (500, 'experimental') Architecture: i386 (x86_64) Foreign Architectures: amd64 Kernel: Linux 4.1.0-2-amd64 (SMP w/2 CPU cores) Locale: LANG=C, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: sysvinit (via /sbin/init) Versions of packages dash depends on: ii debianutils 4.5.1 ii dpkg 1.18.2 ii libc6 2.19-19 -- Jakub Wilk

