Fixed configurable.rb regular expression name check

2 files changed, 7 insertions, 1 deletions

diff --git a/activesupport/lib/active_support/configurable.rb b/activesupport/lib/active_support/configurable.rb
index e0d39d509f..bafcadff9a 100644
--- a/activesupport/lib/active_support/configurable.rb
+++ b/activesupport/lib/active_support/configurable.rb
@@ -107,7 +107,7 @@ module ActiveSupport
         options = names.extract_options!
 
         names.each do |name|
-          raise NameError.new('invalid config attribute name') unless name =~ /^[_A-Za-z]\w*$/
+          raise NameError.new('invalid config attribute name') unless name =~ /\A[_A-Za-z]\w*\Z/
 
           reader, reader_line = "def #{name}; config.#{name}; end", __LINE__
           writer, writer_line = "def #{name}=(value); config.#{name} = value; end", __LINE__
diff --git a/activesupport/test/configurable_test.rb b/activesupport/test/configurable_test.rb
index d00273a028..cb11a4a867 100644
--- a/activesupport/test/configurable_test.rb
+++ b/activesupport/test/configurable_test.rb
@@ -95,6 +95,12 @@ class ConfigurableActiveSupport < ActiveSupport::TestCase
         config_accessor "invalid attribute name"
       end
     end
+    assert_raises NameError do
+      Class.new do
+        include ActiveSupport::Configurable
+        config_accessor "invalid attribute\nname"
+      end
+    end
   end
 
   def assert_method_defined(object, method)