1 files changed, 5 insertions, 1 deletions
diff --git a/rev-list.c b/rev-list.c
index c20fec8..e4d167c 100644
--- a/rev-list.c
+++ b/rev-list.c
@@ -8,7 +8,8 @@
 #define SEEN		(1u << 0)
 #define INTERESTING	(1u << 1)
 #define COUNTED		(1u << 2)
-#define SHOWN		(LAST_EPOCH_FLAG << 2)
+#define SHOWN		(1u << 3)
+#define DUPCHECK	(1u << 4)
 
 static const char rev_list_usage[] =
 	"usage: git-rev-list [OPTION] commit-id <commit-id>\n"
@@ -485,6 +486,9 @@ int main(int argc, char **argv)
 		commit = get_commit_reference(arg, flags);
 		if (!commit)
 			continue;
+		if (commit->object.flags & DUPCHECK)
+			continue;
+		commit->object.flags |= DUPCHECK;
 		insert(commit, &list);
 	}