Fix WSOD when template compilation fails [Rick]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6505 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

 *SVN*
 
+* Fix WSOD when template compilation fails [Rick]
+
 * Change ActionView template defaults.  Look for templates using the request format first, such as "show.html.erb" or "show.xml.builder", before looking for the old defaults like "show.erb" or "show.builder" [Rick]
 
 * Highlight helper highlights one or many terms in a single pass.  [Jeremy Kemper]

actionpack/lib/action_view/base.rb

@@ -428,6 +428,11 @@ def find_base_path_for(template_file_name)
         @view_paths.find { |p| File.file?(File.join(p, template_file_name)) }
       end
 
+      # Returns the view path that the full path resides in.
+      def extract_base_path_from(full_path)
+        @view_paths.find { |p| full_path[0..p.size - 1] == p }
+      end
+
       # Determines the template's file extension, such as rhtml, rxml, or rjs.
       def find_template_extension_for(template_path, formatted_template_path = nil)
         formatted_template_path ||= "#{template_path}.#{template_format}"
@@ -577,7 +582,7 @@ def compile_template(extension, template, file_name, local_assigns)
             logger.debug "Backtrace: #{e.backtrace.join("\n")}"
           end
 
-          raise TemplateError.new(find_base_path_for(file_name || template), file_name || template, @assigns, template, e)
+          raise TemplateError.new(extract_base_path_from(file_name) || @view_paths.first, file_name || template, @assigns, template, e)
         end
 
         @@compile_time[render_symbol] = Time.now