FWIW, disabling progcomp shell option fixes the problem.
$ shopt -u progcomp $ vi # <TAB> <TAB> a b/ c/
From bash manpage (http://man.cx/bash):
> progcomp: If set, the programmable completion facilities (see Programmable Completion above) are enabled. This option is enabled by default.
FWIW, disabling progcomp shell option fixes the problem.
$ shopt -u progcomp
$ vi # <TAB> <TAB>
a b/ c/
From bash manpage (http:// man.cx/ bash):
> progcomp: If set, the programmable completion facilities (see Programmable Completion above) are enabled. This option is enabled by default.