sh: Add test for bin/12137.

tools/regression/bin/sh/expansion/length5.0

@@ -0,0 +1,27 @@
+# $FreeBSD$
+
+unset LC_ALL
+LC_CTYPE=en_US.ISO8859-1
+export LC_CTYPE
+
+e=
+for i in 0 1 2 3; do
+	for j in 0 1 2 3 4 5 6 7; do
+		for k in 0 1 2 3 4 5 6 7; do
+			case $i$j$k in
+			000) continue ;;
+			esac
+			e="$e\\$i$j$k"
+		done
+	done
+done
+ee=`printf "$e"`
+[ ${#ee} = 255 ] || echo bad 1
+[ "${#ee}" = 255 ] || echo bad 2
+[ $((${#ee})) = 255 ] || echo bad 3
+[ "$((${#ee}))" = 255 ] || echo bad 4
+set -- "$ee"
+[ ${#1} = 255 ] || echo bad 5
+[ "${#1}" = 255 ] || echo bad 6
+[ $((${#1})) = 255 ] || echo bad 7
+[ "$((${#1}))" = 255 ] || echo bad 8