# $FreeBSD: releng/12.1/bin/sh/tests/builtins/case20.0 287148 2015-08-25 21:55:15Z jilles $

# Shells do not agree about what this pattern should match, but it is
# certain that it must not crash and the missing close bracket must not
# be simply ignored.

case B in
[[:alpha:]) echo bad ;;
esac