Package: bash Followup-For: Bug #443685 this isn't actually a bug in bash.
$ bash -o posix -c 'a=\\; echo $a\/*' /bin /boot /cdrom /dev /emul /etc /export /home /initrd /lib /lib64 /lost+found /media /mnt /opt /proc /root /sbin /srv /sys /tmp /usr /var is correct behavior. bash 5.2.15 in debian behaves correctly. Arguably it is a bug in dash instead. Discussion here https://austingroupbugs.net/view.php?id=1234