r1288 merge:

fix segfault when event port returns POLLERR without POLLIN or POLLOUT

src/event/modules/ngx_eventport_module.c

@@ -514,6 +514,10 @@ ngx_eventport_process_events(ngx_cycle_t *cycle, ngx_msec_t timer,
 
                 } else {
                     rev->handler(rev);
+
+                    if (ev->closed) {
+                        continue;
+                    }
                 }
 
                 if (rev->accept) {