From d4b98b103ba0d583da6a73fc347f8fe34d0d7c1a Mon Sep 17 00:00:00 2001
From: Phan Le <phan@zenpayroll.com>
Date: Mon, 20 Apr 2015 10:52:07 -0700
Subject: [PATCH] There might be still a small chance that the file was deleted
 between checking it is readable and actually reading it

---
 lib/sass/cache_stores/filesystem.rb | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/sass/cache_stores/filesystem.rb b/lib/sass/cache_stores/filesystem.rb
index eea7c53749..caf6920bf7 100644
--- a/lib/sass/cache_stores/filesystem.rb
+++ b/lib/sass/cache_stores/filesystem.rb
@@ -17,12 +17,12 @@ def initialize(cache_location)
       # @see Base#\_retrieve
       def _retrieve(key, version, sha)
         return unless File.readable?(path_to(key))
-        File.open(path_to(key), "rb") do |f|
-          if f.readline("\n").strip == version && f.readline("\n").strip == sha
-            return f.read
-          end
-        end
         begin
+          File.open(path_to(key), "rb") do |f|
+            if f.readline("\n").strip == version && f.readline("\n").strip == sha
+              return f.read
+            end
+          end
           File.unlink path_to(key)
         rescue Errno::ENOENT
           # Already deleted. Race condition?