--- libev/ev_port.c	2016/02/18 04:48:05	1.29
+++ libev/ev_port.c	2019/06/26 00:01:46	1.30
@@ -1,7 +1,7 @@
 /*
  * libev solaris event port backend
  *
- * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
+ * Copyright (c) 2007,2008,2009,2010,2011,2019 Marc Alexander Lehmann <libev@schmorp.de>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modifica-
@@ -69,7 +69,10 @@
   )
     {
       if (errno == EBADFD)
-        fd_kill (EV_A_ fd);
+        {
+          assert (("libev: port_associate found invalid fd", errno != EBADFD);
+          fd_kill (EV_A_ fd);
+        }
       else
         ev_syserr ("(libev) port_associate");
     }