commit cb4e6762593892dafa86e22c682b2d8f55fca852
Author: Matthias Urlichs <matthias@urlichs.de>
Date:   Sun Feb 8 16:57:11 2015 +0000

    pthread timer is never unhinged from its chain

diff --git a/res/res_timing_pthread.c b/res/res_timing_pthread.c
index 81efbf8..d88e5f7 100644
--- a/res/res_timing_pthread.c
+++ b/res/res_timing_pthread.c
@@ -153,6 +153,12 @@ static void pthread_timer_close(void *data)
 {
 	struct pthread_timer *timer = data;
 
+	ao2_lock(pthread_timers);
+	ast_mutex_lock(&timing_thread.lock);
+	ao2_unlink(pthread_timers, timer);
+	ast_mutex_unlock(&timing_thread.lock);
+	ao2_unlock(pthread_timers);
+
 	ao2_ref(timer, -1);
 }