From e35415efc1e27ca3b73f0d13221a5f0459fd4813 Mon Sep 17 00:00:00 2001
From: Benjamin Reis <benjamin.reis@belledonne-communications.com>
Date: Tue, 7 Mar 2017 10:17:10 +0100
Subject: [PATCH] Fix crash : do not remove deallocated observer

---
 Classes/ContactDetailsView.m | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Classes/ContactDetailsView.m b/Classes/ContactDetailsView.m
index 727a19190..d5a7b4f1d 100644
--- a/Classes/ContactDetailsView.m
+++ b/Classes/ContactDetailsView.m
@@ -222,7 +222,9 @@
 }
 
 - (void)viewWillDisappear:(BOOL)animated {
-	[_tableController.tableView removeObserver:self forKeyPath:@"contentSize"];
+	if (_tableController && _tableController.tableView && [_tableController.tableView observationInfo]) {
+		[_tableController.tableView removeObserver:self forKeyPath:@"contentSize"];
+	}
 	[super viewWillDisappear:animated];
 	PhoneMainView.instance.currentName = NULL;
 	if (self.tmpContact) {