From ba26a4b4e69089d7447d56e53fb6014a3b1182d8 Mon Sep 17 00:00:00 2001
From: leethomas <leet944@gmail.com>
Date: Wed, 30 Dec 2015 12:38:02 -0800
Subject: [PATCH] :apple: fix #3864 where saving a file causes a crash if file
 extension array is empty

---
 atom/browser/ui/file_dialog_mac.mm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/atom/browser/ui/file_dialog_mac.mm b/atom/browser/ui/file_dialog_mac.mm
index 1cbe46e3b55b..676c632a2a44 100644
--- a/atom/browser/ui/file_dialog_mac.mm
+++ b/atom/browser/ui/file_dialog_mac.mm
@@ -34,7 +34,12 @@ void SetAllowedFileTypes(NSSavePanel* dialog, const Filters& filters) {
       [file_type_set addObject:base::mac::CFToNSCast(ext_cf.get())];
     }
   }
-  [dialog setAllowedFileTypes:[file_type_set allObjects]];
+
+  NSArray* file_types = nil;
+  if ([file_type_set count])
+    file_types = [file_type_set allObjects];
+
+  [dialog setAllowedFileTypes: file_types];
 }
 
 void SetupDialog(NSSavePanel* dialog,