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-rwxr-xr-xtests/misc/tac6
1 files changed, 6 insertions, 0 deletions
diff --git a/tests/misc/tac b/tests/misc/tac
index 763104993..4130c004d 100755
--- a/tests/misc/tac
+++ b/tests/misc/tac
@@ -24,6 +24,9 @@ my $prog = 'tac';
my $bad_dir = 'no/such/dir';
+# This must be longer than 16KiB to trigger the double free in coreutils-8.5.
+my $long_line = 'o' x (16 * 1024 + 1);
+
my @Tests =
(
['segfault', '-r', {IN=>"a\n"}, {IN=>"b\n"}, {OUT=>"a\nb\n"}],
@@ -67,6 +70,9 @@ my @Tests =
{ERR_SUBST => "s,`$bad_dir': .*,...,"},
{ERR => "$prog: cannot create temporary file in ...\n"},
{EXIT => 1}],
+
+ # coreutils-8.5's tac would double-free its primary buffer.
+ ['double-free', {IN=>$long_line}, {OUT=>$long_line}],
);
@Tests = triple_test \@Tests;