fix log

app/services/users_service.rb

@@ -343,7 +343,7 @@ class UsersService
             g = Gitlab.client
             g.edit_user(@current_user.gid, :password => params[:new_password])
           rescue Exception => e
-            logger.error "change users password failed! ===> #{e}"
+            Rails.logger.error "change users password failed! ===> #{e.message}"
           end
         end
         #raise @current_user.errors.full_message