From 79460f61229efe76218195b7fb366348d428a1d2 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Wed, 21 Dec 2011 22:12:22 -0800
Subject: [PATCH] Subprocess: Check if data is empty after the process exits as
 well

---
 lib/vagrant/util/subprocess.rb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/vagrant/util/subprocess.rb b/lib/vagrant/util/subprocess.rb
index 9c26a7e64..d8585d14d 100644
--- a/lib/vagrant/util/subprocess.rb
+++ b/lib/vagrant/util/subprocess.rb
@@ -105,10 +105,15 @@ module Vagrant
         # amount of text between the time we last read data and when the
         # process exited.
         [stdout, stderr].each do |io|
+          # Read the extra data, ignoring if there isn't any
           extra_data = read_io(io)
+          next if extra_data == ""
+
+          # Log it out and accumulate
           @logger.debug(extra_data)
           io_data[io] += extra_data
 
+          # Yield to any listeners any remaining data
           io_name = io == stdout ? :stdout : :stderr
           yield io_name, extra_data if block_given?
         end