diff --git a/[refs] b/[refs]
index 5acbb5fedc1b..911168868238 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 63fa471dd49e9c9ce029d910d1024330d9b1b145
+refs/heads/master: 8493fe1daf15324eb13a4cc2f94e258716daa568
diff --git a/trunk/tools/perf/util/ui/browsers/hists.c b/trunk/tools/perf/util/ui/browsers/hists.c
index d7a1c4afe28b..2f83e5dc9967 100644
--- a/trunk/tools/perf/util/ui/browsers/hists.c
+++ b/trunk/tools/perf/util/ui/browsers/hists.c
@@ -125,6 +125,9 @@ static int callchain__count_rows(struct rb_root *chain)
 
 static bool map_symbol__toggle_fold(struct map_symbol *self)
 {
+	if (!self)
+		return false;
+
 	if (!self->has_children)
 		return false;