commit https://github.com/vim/vim/commit/8b374215ccd35003b95ba1df8f12e03bf8a8adc3 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Feb 24 20:43:06 2016 +0100 patch 7.4.1413 Problem: When calling ch_close() the close callback is invoked, even though the docs say it isn't. (Christian J. Robinson) Solution: Don't call the close callback.

--- a/src/netbeans.c
+++ b/src/netbeans.c
@@ -100,7 +100,7 @@ netbeans_close(void)
 	netbeans_send_disconnect();
 	if (nb_channel != NULL)
 	    /* Close the socket and remove the input handlers. */
-	    channel_close(nb_channel);
+	    channel_close(nb_channel, TRUE);
 	nb_channel = NULL;
     }