test: also check the result of merge_gid_lists()

Fixes CID#1412354.

diff --git a/src/test/test-user-util.c b/src/test/test-user-util.c
index 6bfe7dc7e174109ec8c9058750db983584fe5e9e..084a584876dde73ce36971407174c967281e1d57 100644 (file)
--- a/src/test/test-user-util.c
+++ b/src/test/test-user-util.c
@@ -310,15 +310,19 @@ static void test_gid_lists_ops(void) {
         int nresult;
 
         nresult = merge_gid_lists(l2, ELEMENTSOF(l2), l3, ELEMENTSOF(l3), &res1);
+        assert_se(nresult >= 0);
         assert_se(memcmp_nn(res1, nresult, result1, ELEMENTSOF(result1)) == 0);
 
         nresult = merge_gid_lists(NULL, 0, l2, ELEMENTSOF(l2), &res2);
+        assert_se(nresult >= 0);
         assert_se(memcmp_nn(res2, nresult, l2, ELEMENTSOF(l2)) == 0);
 
         nresult = merge_gid_lists(l1, ELEMENTSOF(l1), l1, ELEMENTSOF(l1), &res3);
+        assert_se(nresult >= 0);
         assert_se(memcmp_nn(l1, ELEMENTSOF(l1), res3, nresult) == 0);
 
         nresult = merge_gid_lists(l1, ELEMENTSOF(l1), l4, ELEMENTSOF(l4), &res4);
+        assert_se(nresult >= 0);
         assert_se(memcmp_nn(result2, ELEMENTSOF(result2), res4, nresult) == 0);
 
         nresult = getgroups_alloc(&gids);