From 8cf8877e507afa24d668a3737121398367cbca11 Mon Sep 17 00:00:00 2001
From: "Brian C. Lane" <bcl@redhat.com>
Date: Fri, 4 Mar 2016 13:43:43 -0800
Subject: [PATCH] pylorax: Fix undefind strings on subprocess crash

Set output_string and err_string to None so that a crash will not crash.
---
 src/pylorax/executils.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/pylorax/executils.py b/src/pylorax/executils.py
index 1cdd1a31..0dd8d969 100644
--- a/src/pylorax/executils.py
+++ b/src/pylorax/executils.py
@@ -153,6 +153,8 @@ def _run_program(argv, root='/', stdin=None, stdout=None, env_prune=None, log_ou
                             env_prune=env_prune, universal_newlines=not binary_output,
                             env_add=env_add, reset_handlers=reset_handlers, reset_lang=reset_lang)
 
+        output_string = None
+        err_string = None
         if callback:
             while callback(proc) and proc.poll() is None:
                 try: