erb.rb: safe concurrent use

* lib/erb.rb (ERB#run, ERB#result): eval under isolated bindings for
  safe concurrent use.  [ruby-core:47638] [Bug #7046]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37594 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 1 deletions

diff --git a/test/erb/test_erb.rb b/test/erb/test_erb.rb
index 7ddbc878d4..686c404702 100644
--- a/test/erb/test_erb.rb
+++ b/test/erb/test_erb.rb
@@ -1,3 +1,4 @@
+# -*- coding: us-ascii -*-
 require 'test/unit'
 require 'erb'
 
@@ -44,11 +45,20 @@ class TestERB < Test::Unit::TestCase
 
     assert_equal("", ERB::Util.html_escape(""))
     assert_equal("abc", ERB::Util.html_escape("abc"))
-    assert_equal("&lt;&lt;", ERB::Util.html_escape("<<"))
+    assert_equal("&lt;&lt;", ERB::Util.html_escape("<\<"))
 
     assert_equal("", ERB::Util.html_escape(nil))
     assert_equal("123", ERB::Util.html_escape(123))
   end
+
+  def test_concurrent_default_binding
+    template1 = 'one <%= ERB.new(template2).result %>'
+
+    eval 'template2 = "two"', TOPLEVEL_BINDING
+
+    bug7046 = '[ruby-core:47638]'
+    assert_equal("one two", ERB.new(template1).result, bug7046)
+  end
 end
 
 class TestERBCore < Test::Unit::TestCase