From e3cccf380c23891089d7c3a4637cac50010a600d Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Fri, 16 Nov 2012 11:55:27 -0500
Subject: [PATCH] Avoid crash when event_pending() called with no event_base
 set on event

Instead, give a warning and return 0.

Reported by Antony Dovgal on github as
   https://github.com/libevent/libevent/issues/19
---
 event.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/event.c b/event.c
index 91cb0cce..a979f1f2 100644
--- a/event.c
+++ b/event.c
@@ -1850,6 +1850,11 @@ event_pending(const struct event *ev, short event, struct timeval *tv)
 {
 	int flags = 0;
 
+	if (EVUTIL_FAILURE_CHECK(ev->ev_base == NULL)) {
+		event_warnx("%s: event has no event_base set.", __func__);
+		return 0;
+	}
+
 	EVBASE_ACQUIRE_LOCK(ev->ev_base, th_base_lock);
 	_event_debug_assert_is_setup(ev);