user$ echo $SHELL
/bin/bash
user$ grep completion ~/.bashrc
if [ -f /etc/bash_completion ] && ! shopt -oq posix; then
    . /etc/bash_completion
user$
user$ ls test[TAB]
test.log1
test.log2
test.log4
test.log5

user$ ./script.sh >& test[TAB]  <-- "no output"