--- ./samba-4.5.5/lib/tevent/tevent_epoll.c	2016-08-11 15:51:04.000000000 +0800
+++ tevent_epoll_new.c	2017-02-04 13:45:46.000000000 +0800
@@ -251,6 +251,7 @@
 			if (caller_panic_state != NULL) {
 				*caller_panic_state = true;
 			}
+			epoll_ev->panic_state = NULL;
 			return;
 		}
 	}