From a85d9930c592191bcf432736094b950cc0852579 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Moser?= <mail@renemoser.net>
Date: Wed, 1 Jun 2016 22:43:34 +0200
Subject: [PATCH] apt: fix KeyError for deb=file (#3816)

Fix KeyError: 'prepared' while installing dependencies using deb=<file>.deb
This error shows up when --diff was not passed by and the deb files has dependencies not yet installed.
Closes #3752.
---
 lib/ansible/modules/packaging/os/apt.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/ansible/modules/packaging/os/apt.py b/lib/ansible/modules/packaging/os/apt.py
index 1c388b413cd..aaed23831a1 100644
--- a/lib/ansible/modules/packaging/os/apt.py
+++ b/lib/ansible/modules/packaging/os/apt.py
@@ -535,7 +535,8 @@ def install_deb(m, debs, cache, force, install_recommends, allow_unauthenticated
             stdout = out
         if "diff" in retvals:
             diff = retvals["diff"]
-            diff["prepared"] += '\n\n' + out
+            if 'prepared' in diff:
+                diff['prepared'] += '\n\n' + out
         else:
             diff = out
         if "stderr" in retvals: