Do not output multiple 'Found duplicate' error messages in test_stack

(fix of commit dfc5459a6)

* tests/test_stack.c (check_list): Call abort() immediately if a
duplicate element is found (instead of incrementing err_cnt).

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/test_stack.c b/tests/test_stack.c
index 155d695..84b240b 100644
--- a/tests/test_stack.c
+++ b/tests/test_stack.c
@@ -146,7 +146,7 @@ void check_list(int n)
       else if (marks[i] != 0)
         {
           fprintf(stderr, "Found duplicate list element %d\n", i);
-          err_cnt++;
+          abort();
         }
       else marks[i] = 1;
     }