From bba85b4bd9754766edb723bbb67375980ba64bdc Mon Sep 17 00:00:00 2001
From: Jack Nagel
Date: Fri, 9 Nov 2012 14:04:05 -0600
Subject: Formula#system: don't try to close a closed stream

The new formula debugger users continuations to jump back up the stack,
and thus anything that has the potential to be executed twice (i.e.
ensure blocks) needs to to be essentially idempotent.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
---
 Library/Homebrew/formula.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Library')

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index a76740ef7..f68df9d74 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -552,7 +552,7 @@ protected
   rescue ErrorDuringExecution => e
     raise BuildError.new(self, cmd, args, $?)
   ensure
-    f.close if f
+    f.close if f and not f.closed?
     removed_ENV_variables.each do |key, value|
       ENV[key] = value
     end if removed_ENV_variables
-- 
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