cut: detect error when bounds are reversed

The command 'cut -b 3-2' failed to detect that the bounds were
incorrectly ordered, though the check worked when the difference
between the bounds was larger.

The comparison was made after the lower bound has been decremented
but before the upper bound had.

Adds 0-16 bytes.

(GitHub issue #467)

1 files changed, 4 insertions, 1 deletions

diff --git a/testsuite/cut.tests b/testsuite/cut.tests
index 2458c019c..a31f41f7f 100755
--- a/testsuite/cut.tests
+++ b/testsuite/cut.tests
@@ -31,7 +31,10 @@ testing "-b encapsulated" "cut -b 3-8,4-6 input" "e:two:\npha:be\ne quic\n" \
 #testing "cut -bO overlaps" \
 #  "cut --output-delimiter ' ' -b 1-3,2-5,7-9,9-10 input" \
 #  "one:t o:th\nalpha beta\nthe q ick \n" "$abc" ""
-testing "cut high-low error" "cut -b 8-3 abc.txt 2>/dev/null || echo err" "err\n" \
+testing "cut high-low error" "cut -b 8-3 input 2>/dev/null || echo err" "err\n" \
+  "$abc" ""
+
+testing "cut -b 2-1 error" "cut -b 2-1 input 2>/dev/null || echo err" "err\n" \
   "$abc" ""
 
 testing "cut -c a-b" "cut -c 4-10 input" ":two:th\nha:beta\n quick \n" "$abc" ""