From fdc043e7b1395fd9989b2a6bb366f9784b5e6f4a Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Sun, 24 May 2009 23:44:23 +0200
Subject: [PATCH] add an assert to help debugging

---
 src/channel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/channel.c b/src/channel.c
index e538e04..e94c37d 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -45,6 +45,7 @@
 #ifdef HAVE_INTTYPES_H
 #include <inttypes.h>
 #endif
+#include <assert.h>
 
 #include "channel.h"
 #include "transport.h"
@@ -2435,6 +2436,8 @@ int _libssh2_channel_free(LIBSSH2_CHANNEL *channel)
     unsigned long data_len;
     int rc;
 
+    assert(session);
+
     if (channel->free_state == libssh2_NB_state_idle) {
         _libssh2_debug(session, LIBSSH2_DBG_CONN,
                        "Freeing channel %lu/%lu resources", channel->local.id,