From e63b4c932f31c940c331c2aaf84ef7e7b9e475ad Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Thu, 19 Sep 2013 09:43:00 -0400
Subject: [PATCH] Cache: create missing hash entries from previous versions of
 the cache file

---
 lib/rscons/cache.rb | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/rscons/cache.rb b/lib/rscons/cache.rb
index ee133e5..dc94a7f 100644
--- a/lib/rscons/cache.rb
+++ b/lib/rscons/cache.rb
@@ -60,11 +60,10 @@ module Rscons
     # Create a Cache object and load in the previous contents from the cache
     # file.
     def initialize
-      @cache = YAML.load(File.read(CACHE_FILE)) rescue {
-        targets: {},
-        directories: {},
-        version: VERSION,
-      }
+      @cache = YAML.load(File.read(CACHE_FILE)) rescue {}
+      @cache[:targets] ||= {}
+      @cache[:directories] ||= {}
+      @cache[:version] ||= VERSION
       @lookup_checksums = {}
     end