Merge pull request #6847 from benolee/patch-1

Correct line numbers for reader and writer methods in AS configurable

The line number for the reader method is off by one due to the local variable line being reassigned to the writer's line.

This commit would provide correct line numbers for backtraces and method introspection (for example, method(:reader).source_location).

activesupport/lib/active_support/configurable.rb

@@ -98,15 +98,15 @@ def config_accessor(*names)
         names.each do |name|
           raise NameError.new('invalid config attribute name') unless name =~ /^[_A-Za-z]\w*$/
 
-          reader, line = "def #{name}; config.#{name}; end", __LINE__
-          writer, line = "def #{name}=(value); config.#{name} = value; end", __LINE__
+          reader, reader_line = "def #{name}; config.#{name}; end", __LINE__
+          writer, writer_line = "def #{name}=(value); config.#{name} = value; end", __LINE__
 
-          singleton_class.class_eval reader, __FILE__, line
-          singleton_class.class_eval writer, __FILE__, line
+          singleton_class.class_eval reader, __FILE__, reader_line
+          singleton_class.class_eval writer, __FILE__, writer_line
 
           unless options[:instance_accessor] == false
-            class_eval reader, __FILE__, line unless options[:instance_reader] == false
-            class_eval writer, __FILE__, line unless options[:instance_writer] == false
+            class_eval reader, __FILE__, reader_line unless options[:instance_reader] == false
+            class_eval writer, __FILE__, writer_line unless options[:instance_writer] == false
           end
         end
       end