unrecognized tag 'while'/'for'

in my tpl test page this is the code

{assign var=foo value=5}
<ul>
{while $foo > 0}
  <li>while {$foo}</li>
  {$foo--}
{/while}
</ul>

<ul>
{for foo=1 to 3}
    <li>for {$foo}</li>
{/for}
</ul>

this is the output
Fatal error: Smarty error: [in index.tpl line 83]: syntax error: unrecognized 
tag 'while' (Smarty_Compiler.class.php, line 590) in 
/home/a6814821/public_html/TestSmarty/lib/Smarty-2.6.28/libs/Smarty.class.php 
on line 1094

Fatal error: Smarty error: [in index.tpl line 83]: syntax error: unrecognized 
tag 'for' (Smarty_Compiler.class.php, line 590) in 
/home/a6814821/public_html/TestSmarty/lib/Smarty-2.6.28/libs/Smarty.class.php 
on line 1094

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?
Smarty Version 2.6.28
Apache ver.     2.2.19 (Unix)
PHP version     5.2.*

Please provide any additional information below.

Original issue reported on code.google.com by ttoDF...@gmail.com on 24 Nov 2014 at 11:21

Jeff-Lewis / smarty-php

unrecognized tag 'while'/'for' #214