Previously we only added the "lib" subdirectory to the load path when

setting up gem dependencies for frozen gems. Now we add the "ext"
subdirectory as well for those gems which have compiled C extensions
as well. [Wincent Colaiuta]

[#268 state:resolved]

railties/lib/rails/gem_dependency.rb

@@ -31,7 +31,9 @@ def add_load_paths
         args << @requirement.to_s if @requirement
         gem *args
       else
-        $LOAD_PATH << File.join(unpacked_paths.first, 'lib')
+        $LOAD_PATH.unshift File.join(unpacked_paths.first, 'lib')
+        ext = File.join(unpacked_paths.first, 'ext')
+        $LOAD_PATH.unshift(ext) if File.exist?(ext)
         @frozen = true
       end
       @load_paths_added = true