From dc79069b7726a84c5e25313b084ba1a9fedc2e91 Mon Sep 17 00:00:00 2001
From: Pierre HUBERT <pierre.git@communiquons.org>
Date: Sat, 6 Jul 2019 17:13:16 +0200
Subject: [PATCH] Fix issue on slow connections

---
 lib/ui/screens/conversation_screen.dart | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/ui/screens/conversation_screen.dart b/lib/ui/screens/conversation_screen.dart
index 069a6a6..7843eae 100644
--- a/lib/ui/screens/conversation_screen.dart
+++ b/lib/ui/screens/conversation_screen.dart
@@ -63,7 +63,9 @@ class _ConversationScreenState extends State<ConversationScreen> {
   @override
   void deactivate() {
     super.deactivate();
-    _refreshTime.cancel();
+
+    if(_refreshTime != null)
+      _refreshTime.cancel();
   }
 
   void _setError(ErrorLevel err) => setState(() => _error = err);