Index: lib/rubygems/version.rb
===================================================================
--- lib/rubygems/version.rb	(revision 43826)
+++ lib/rubygems/version.rb	(working copy)
@@ -145,8 +145,8 @@ class Gem::Version
 
   include Comparable
 
-  VERSION_PATTERN = '[0-9]+(\.[0-9a-zA-Z]+)*' # :nodoc:
-  ANCHORED_VERSION_PATTERN = /\A\s*(#{VERSION_PATTERN})*\s*\z/ # :nodoc:
+  VERSION_PATTERN = '[0-9]+(?>\.[0-9a-zA-Z]+)*' # :nodoc:
+  ANCHORED_VERSION_PATTERN = /\A\s*(#{VERSION_PATTERN})?\s*\z/ # :nodoc:
 
   ##
   # A string representation of this Version.
Index: lib/rubygems.rb
===================================================================
--- lib/rubygems.rb	(revision 43826)
+++ lib/rubygems.rb	(working copy)
@@ -121,7 +121,7 @@ require "rubygems/deprecate"
 # -The RubyGems Team
 
 module Gem
-  VERSION = '1.8.23'
+  VERSION = '1.8.23.2'
 
   ##
   # Raised when RubyGems is unable to load or activate a gem.  Contains the
Index: test/rubygems/test_gem_requirement.rb
===================================================================
--- test/rubygems/test_gem_requirement.rb	(revision 43826)
+++ test/rubygems/test_gem_requirement.rb	(working copy)
@@ -37,17 +37,19 @@ class TestGemRequirement < Gem::TestCase
   end
 
   def test_parse_bad
-    e = assert_raises ArgumentError do
-      Gem::Requirement.parse nil
-    end
-
-    assert_equal 'Illformed requirement [nil]', e.message
+    [
+      nil,
+      '',
+      '! 1',
+      '= junk',
+      '1..2',
+    ].each do |bad|
+      e = assert_raises ArgumentError do
+        Gem::Requirement.parse bad
+      end
 
-    e = assert_raises ArgumentError do
-      Gem::Requirement.parse ""
+      assert_equal "Illformed requirement [#{bad.inspect}]", e.message
     end
-
-    assert_equal 'Illformed requirement [""]', e.message
   end
 
   def test_prerelease_eh
Index: test/rubygems/test_gem_version.rb
===================================================================
--- test/rubygems/test_gem_version.rb	(revision 43826)
+++ test/rubygems/test_gem_version.rb	(working copy)
@@ -64,12 +64,18 @@ class TestGemVersion < Gem::TestCase
   end
 
   def test_initialize_bad
-    ["junk", "1.0\n2.0"].each do |bad|
-      e = assert_raises ArgumentError do
+    %W[
+      junk
+      1.0\n2.0
+      1..2
+      1.2\ 3.4
+      1-2-3
+    ].each do |bad|
+      e = assert_raises ArgumentError, bad do
         Gem::Version.new bad
       end
 
-      assert_equal "Malformed version number string #{bad}", e.message
+      assert_equal "Malformed version number string #{bad}", e.message, bad
     end
   end