diff --git a/revision.c b/revision.c
index 307f41e889..0107ac1077 100644
--- a/revision.c
+++ b/revision.c
@@ -2943,6 +2943,8 @@ static void release_revisions_mailmap(struct string_list *mailmap)
 	free(mailmap);
 }
 
+static void release_revisions_topo_walk_info(struct topo_walk_info *info);
+
 void release_revisions(struct rev_info *revs)
 {
 	free_commit_list(revs->commits);
@@ -2956,6 +2958,7 @@ void release_revisions(struct rev_info *revs)
 	free_grep_patterns(&revs->grep_filter);
 	diff_free(&revs->pruning);
 	reflog_walk_info_release(revs->reflog_info);
+	release_revisions_topo_walk_info(revs->topo_walk_info);
 }
 
 static void add_child(struct rev_info *revs, struct commit *parent, struct commit *child)
@@ -3468,17 +3471,22 @@ static void compute_indegrees_to_depth(struct rev_info *revs,
 		indegree_walk_step(revs);
 }
 
-static void reset_topo_walk(struct rev_info *revs)
+static void release_revisions_topo_walk_info(struct topo_walk_info *info)
 {
-	struct topo_walk_info *info = revs->topo_walk_info;
-
+	if (!info)
+		return;
 	clear_prio_queue(&info->explore_queue);
 	clear_prio_queue(&info->indegree_queue);
 	clear_prio_queue(&info->topo_queue);
 	clear_indegree_slab(&info->indegree);
 	clear_author_date_slab(&info->author_date);
+	free(info);
+}
 
-	FREE_AND_NULL(revs->topo_walk_info);
+static void reset_topo_walk(struct rev_info *revs)
+{
+	release_revisions_topo_walk_info(revs->topo_walk_info);
+	revs->topo_walk_info = NULL;
 }
 
 static void init_topo_walk(struct rev_info *revs)