log: fix memory leak if --graph is passed multiple times

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/revision.c b/revision.c
index ad4286f..816061f 100644
--- a/revision.c
+++ b/revision.c
@@ -2426,6 +2426,7 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg
 	} else if (!strcmp(arg, "--graph")) {
 		revs->topo_order = 1;
 		revs->rewrite_parents = 1;
+		graph_clear(revs->graph);
 		revs->graph = graph_init(revs);
 	} else if (!strcmp(arg, "--encode-email-headers")) {
 		revs->encode_email_headers = 1;