--- a/tools/locktest/testlk.c   2018-05-22 12:33:01.000000000 -0600
+++ a/tools/locktest/testlk.c   2018-06-01 02:24:13.448954160 -0600
@@ -81,8 +81,8 @@
                if (fl.l_type == F_UNLCK) {
                        printf("%s: no conflicting lock\n", fname);
                } else {
-                       printf("%s: conflicting lock by %d on (%ld;%ld)\n",
-                               fname, fl.l_pid, fl.l_start, fl.l_len);
+                       printf("%s: conflicting lock by %d on (%lld;%lld)\n",
+                               fname, fl.l_pid, (long long) fl.l_start, (long long) fl.l_len);
                }
                return 0;
        }