From 849c4eaaf3a03e98ee1f7aefbf58ec152585e4df Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 18 Oct 2012 01:29:54 +0000
Subject: [PATCH] test_syntax.rb: test_unassignable

* test/ruby/test_syntax.rb (TestSyntax#test_unassignable): assert
  keywords are unassignable.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37250 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_syntax.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 35c70254bf..8b89f95dc4 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -186,6 +186,12 @@ class TestSyntax < Test::Unit::TestCase
     assert_valid_syntax("def self; :foo; end", __FILE__, bug6403)
   end
 
+  def test_unassignable
+    %w[self nil true false __FILE__ __LINE__ __ENCODING__].each do |kwd|
+      assert_raise(SyntaxError) {eval("#{kwd} = nil")}
+    end
+  end
+
   private
 
   def not_label(x) @result = x; @not_label ||= nil end