From 9b9e9eb8ddcfaf711a158548a66cb358f7de9665 Mon Sep 17 00:00:00 2001
From: Zhiming Wang
Date: Sun, 25 Sep 2016 11:04:16 -0400
Subject: ARGV: kegs: error on empty arguments

Fixes #1138.
---
 Library/Homebrew/extend/ARGV.rb | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'Library')

diff --git a/Library/Homebrew/extend/ARGV.rb b/Library/Homebrew/extend/ARGV.rb
index c217ed8a5..f2f959f22 100644
--- a/Library/Homebrew/extend/ARGV.rb
+++ b/Library/Homebrew/extend/ARGV.rb
@@ -65,6 +65,8 @@ module HomebrewArgvExtension
     require "keg"
     require "formula"
     @kegs ||= downcased_unique_named.collect do |name|
+      raise UsageError if name.empty?
+
       rack = Formulary.to_rack(name.downcase)
 
       dirs = rack.directory? ? rack.subdirs : []
-- 
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