Add test to detect this.

This would fail due to reading from freed buffer with coreutils-5.0.91.

diff --git a/tests/misc/csplit b/tests/misc/csplit
index b0cb1fa..2d04fee 100755 (executable)
--- a/tests/misc/csplit
+++ b/tests/misc/csplit
@@ -36,6 +36,14 @@ cmp out exp || fail=1
 test $fail = 1 && diff out exp 2> /dev/null
 rm -f in out exp
 
+# Ensure that xx02 contains just two newlines.
+# This would fail due to reading from freed buffer with coreutils-5.0.91.
+printf '\n\n' > exp
+cp xx02 out || fail=1
+cmp out exp || fail=1
+test $fail = 1 && diff out exp 2> /dev/null
+rm -f in out exp
+
 # csplit would infloop
 (echo; echo a) > in
 csplit in '/a/-1' '{*}' > out || fail=1