diff --git a/[refs] b/[refs]
index b8b48b99e7ba..44c4c1376af7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 076c6e45215aea0de1ed34d3d5079fabeaabf5e1
+refs/heads/master: 70597f21f128b7dd6a2490078bea99d704b6f8c3
diff --git a/trunk/tools/perf/util/session.c b/trunk/tools/perf/util/session.c
index 5d2fd52fe7b5..fa9d652c2dc3 100644
--- a/trunk/tools/perf/util/session.c
+++ b/trunk/tools/perf/util/session.c
@@ -166,6 +166,7 @@ void perf_session__delete(struct perf_session *self)
 
 void perf_session__remove_thread(struct perf_session *self, struct thread *th)
 {
+	self->last_match = NULL;
 	rb_erase(&th->rb_node, &self->threads);
 	/*
 	 * We may have references to this thread, for instance in some hist_entry