Don't shadow outer local variable.

activerecord/lib/active_record/associations/class_methods/join_dependency.rb

@@ -187,8 +187,8 @@ def construct(parent, associations, join_parts, row)
               construct(parent, association, join_parts, row)
             end
           when Hash
-            associations.sort_by { |k,_| k.to_s }.each do |name, assoc|
-              association = construct(parent, name, join_parts, row)
+            associations.sort_by { |k,_| k.to_s }.each do |association_name, assoc|
+              association = construct(parent, association_name, join_parts, row)
               construct(association, assoc, join_parts, row) if association
             end
           else