From 8b3e304f15cb69f6446776718ca79619d15646b1 Mon Sep 17 00:00:00 2001
From: Seungha Yang <seungha.yang@navercorp.com>
Date: Mon, 14 Jan 2019 12:45:29 +0900
Subject: [PATCH] nlecomposition: Don't try dump null stack

Fixes following assertion
Unexpected critical/warning: g_node_traverse: assertion 'root != NULL' failed
---
 plugins/nle/nlecomposition.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/plugins/nle/nlecomposition.c b/plugins/nle/nlecomposition.c
index 75d9151b87..2f90b43a65 100644
--- a/plugins/nle/nlecomposition.c
+++ b/plugins/nle/nlecomposition.c
@@ -2967,6 +2967,9 @@ _dump_stack (NleComposition * comp, GNode * stack)
 #ifndef GST_DISABLE_GST_DEBUG
   GString *res;
 
+  if (!stack)
+    return;
+
   if (gst_debug_category_get_threshold (nlecomposition_debug) < GST_LEVEL_INFO)
     return;