default for $debug_tpl will be set up in Smarty_Internal_Debug

change_log.txt

@@ -1,6 +1,11 @@
  ===== 3.1.24.dev ===== (xx.xx.2015)
  13.05.2015
   - improvement remove not needed ?><?php transitions from compiled code
+  - improvement of debugging:
+      - use fresh Smarty object to display the debug console because of possible problems when the Smarty
+        was extended or Smarty properties had been modified in the class source
+      - display Smarty version number
+      - Truncate lenght of Origin display and extend strin value display to 80 character
   
  12.05.2015
   - bugfix {$smarty.constant.TEST} did fail  on undefined constant https://github.com/smarty-php/smarty/issues/28

libs/Smarty.class.php

@@ -111,7 +111,7 @@ class Smarty extends Smarty_Internal_TemplateBase
     /**
      * smarty version
      */
-    const SMARTY_VERSION = '3.1.24-dev/3';
+    const SMARTY_VERSION = '3.1.24-dev/4';
 
     /**
      * define variable scopes
@@ -686,8 +686,6 @@ class Smarty extends Smarty_Internal_TemplateBase
         } else {
             $this->setPluginsDir(SMARTY_PLUGINS_DIR);
         }
-
-        $this->debug_tpl = 'file:' . dirname(__FILE__) . '/debug.tpl';
         if (isset($_SERVER['SCRIPT_NAME'])) {
             Smarty::$global_tpl_vars['SCRIPT_NAME'] = new Smarty_Variable($_SERVER['SCRIPT_NAME']);
         }