From 71d34a86d6cfa6c9d5b20cd56b3cccd013339448 Mon Sep 17 00:00:00 2001
From: Misty De Meo
Date: Thu, 10 May 2012 14:15:23 -0500
Subject: doctor: report if a path element is invalid

Under certain circumstances, an invalid path element would cause
File.expand_path to bail out. Catch mistakes and report them, then
continue instead.

Fixes Homebrew/homebrew#12154
---
 Library/Homebrew/cmd/doctor.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/cmd/doctor.rb b/Library/Homebrew/cmd/doctor.rb
index 1940ff272..33e01f0fc 100644
--- a/Library/Homebrew/cmd/doctor.rb
+++ b/Library/Homebrew/cmd/doctor.rb
@@ -32,7 +32,12 @@ end
 
 
 def path_folders
-  ENV['PATH'].split(':').collect{|p| remove_trailing_slash(File.expand_path(p))}.uniq
+  @path_folders ||= ENV['PATH'].split(':').collect do |p|
+    begin remove_trailing_slash(File.expand_path(p))
+    rescue ArgumentError
+      onoe "The following PATH component is invalid: #{p}"
+    end
+  end.uniq.compact
 end
 
 
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