From 1ae44d44299803ec0da62731ac7b808d1d32f5aa Mon Sep 17 00:00:00 2001
From: Xu Cheng
Date: Fri, 9 Oct 2015 19:03:20 +0800
Subject: use directory? to check rack existence

---
 Library/Homebrew/cmd/outdated.rb | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

(limited to 'Library/Homebrew/cmd/outdated.rb')

diff --git a/Library/Homebrew/cmd/outdated.rb b/Library/Homebrew/cmd/outdated.rb
index d432c4e83..7a199fcae 100644
--- a/Library/Homebrew/cmd/outdated.rb
+++ b/Library/Homebrew/cmd/outdated.rb
@@ -18,10 +18,9 @@ module Homebrew
       all_versions = []
       older_or_same_tap_versions = []
 
-      if f.oldname && !f.rack.exist? && (dir = HOMEBREW_CELLAR/f.oldname).exist?
-        if f.tap == Tab.for_keg(dir.subdirs.first).tap
-          raise Migrator::MigrationNeededError.new(f)
-        end
+      if f.oldname && !f.rack.exist? && (dir = HOMEBREW_CELLAR/f.oldname).directory? &&
+        !dir.subdirs.empty? && f.tap == Tab.for_keg(dir.subdirs.first).tap
+        raise Migrator::MigrationNeededError.new(f)
       end
 
       f.rack.subdirs.each do |keg_dir|
-- 
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