# Character ranges outside the POSIX locale are unspecified. Keep this test
# in the C locale so it remains deterministic across libc implementations.

unset LC_CTYPE LC_COLLATE LANG LANGUAGE
LC_ALL=C
export LC_ALL

c1=e
c2=o

case $c1$c2 in
[a-z][a-z]) ;;
*) echo wrong at $LINENO ;;
esac

case $c1$c2 in
[a-f][n-p]) ;;
*) echo wrong at $LINENO ;;
esac