From c518e503202f8c07685dc00754a794a73ebc5754 Mon Sep 17 00:00:00 2001
From: Xu Cheng
Date: Sat, 15 Aug 2015 15:56:57 +0800
Subject: install: f.oldname can be nil

---
 Library/Homebrew/cmd/install.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'Library')

diff --git a/Library/Homebrew/cmd/install.rb b/Library/Homebrew/cmd/install.rb
index 3ef27748c..19c826d44 100644
--- a/Library/Homebrew/cmd/install.rb
+++ b/Library/Homebrew/cmd/install.rb
@@ -72,7 +72,7 @@ module Homebrew
         if f.installed?
           msg = "#{f.full_name}-#{f.installed_version} already installed"
           unless f.linked_keg.symlink?
-            if Pathname.new("#{HOMEBREW_CELLAR}/#{f.oldname}").exist?
+            if f.oldname && (HOMEBREW_CELLAR/f.oldname).exist?
               msg << ", it's just not migrated"
             elsif !f.keg_only?
               msg << ", it's just not linked"
-- 
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