From: Timo Sirainen <timo.sirainen@dovecot.fi>
Date: Mon, 3 Sep 2018 11:15:07 +0000 (+0300)
Subject: lib-master: Fix crash when stats events are merged all the way to the root
X-Git-Tag: 2.3.9~1464
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3d2ee2eda61c12193f6f3813956280ccd0317502;p=thirdparty%2Fdovecot%2Fcore.git

lib-master: Fix crash when stats events are merged all the way to the root
---

diff --git a/src/lib-master/stats-client.c b/src/lib-master/stats-client.c
index dbc1e03d7e..4155947a7f 100644
--- a/src/lib-master/stats-client.c
+++ b/src/lib-master/stats-client.c
@@ -199,7 +199,8 @@ static struct event *stats_event_get_merged(struct event *event)
 			res = event_dup(event);
 		event_unref(&res->parent);
 		res->parent = p;
-		event_ref(res->parent);
+		if (res->parent != NULL)
+			event_ref(res->parent);
 	}
 	return res;
 }