Index: channels/chan_iax2.c
===================================================================
--- channels/chan_iax2.c	(revision 160296)
+++ channels/chan_iax2.c	(working copy)
@@ -4401,7 +4401,7 @@
 	frb.fr2.afdatalen = sizeof(frb.buffer);
 
 	if (!pvt) {
-		ast_log(LOG_WARNING, "No private structure for packet?\n");
+		ast_log(LOG_WARNING, "No private structure for packet? (frametype %d/subtype %d)\n", f->frametype, f->subclass);
 		return -1;
 	}
 	
@@ -5114,9 +5114,10 @@
 				res = 0;
 			else if (!ast_test_flag(&iaxs[callno]->state, IAX_STATE_STARTED))
 				res = 0;
-			else
+			else {
 			/* Simple, just queue for transmission */
 				res = iax2_send(iaxs[callno], f, 0, -1, 0, 0, 0);
+			}
 		} else {
 			if (option_debug)
 				ast_log(LOG_DEBUG, "Write error: %s\n", strerror(errno));
@@ -5150,7 +5151,12 @@
 {
 	int res;
 	ast_mutex_lock(&iaxsl[callno]);
-	res = send_command(iaxs[callno], type, command, ts, data, datalen, seqno);
+	if (!iaxs[callno]) {
+		ast_log(LOG_WARNING, "Call %d no longer exists.  Cannot send (type %hhd/cmd %d/ts %u)\n", type, command, ts);
+		res = -1;
+	} else {
+		res = send_command(iaxs[callno], type, command, ts, data, datalen, seqno);
+	}
 	ast_mutex_unlock(&iaxsl[callno]);
 	return res;
 }