Turn warnings on when loading a file if Dependencies.mechanism == :load. Common mistakes such as redefined methods will print warnings to stderr. References #752. References #1792.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3124 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Turn warnings on when loading a file if Dependencies.mechanism == :load.  Common mistakes such as redefined methods will print warnings to stderr.  [Jeremy Kemper]
+
 * Add Symbol#to_proc, which allows for, e.g. [:foo, :bar].map(&:to_s). [Marcel Molina Jr.]
 
 * Added the following methods [Marcel Molina Jr., Sam Stephenson]:

activesupport/lib/active_support/dependencies.rb

@@ -33,12 +33,21 @@ def associate_with(file_name)
   def clear
     self.loaded = [ ]
   end
-  
+
   def require_or_load(file_name)
     file_name = "#{file_name}.rb" unless ! load? || file_name[-3..-1] == '.rb'
-    load? ? load(file_name) : require(file_name)
+    if load?
+      begin
+        original_verbosity, $VERBOSE = $VERBOSE, true
+        load file_name
+      ensure
+        $VERBOSE = original_verbosity
+      end
+    else
+      require file_name
+    end
   end
-  
+
   def remove_subclasses_for(*classes)
     Object.remove_subclasses_of(*classes)
   end