Compilation error ?

Hello,

I had difficulty identifying a problem in a template. After reading the documentation I wonder if the behavior is normal or faulty.

$WXO_PRODUCT_CROSS and $WXO_PRODUCT_UP both have the value "".

The following code should not produce HTML output but it does. My error is a missing $ in the first condition.

            {if isset($WXO_PRODUCT_CROSS) && WXO_PRODUCT_CROSS ne ''}
                {if isset($WXO_PRODUCT_CROSS) && $WXO_PRODUCT_CROSS ne ''}
                <a href="#tab-articles-complementaires">{t}Additional articles{/t}</a>
                {/if}
                {if isset($WXO_PRODUCT_UP) && $WXO_PRODUCT_UP ne ''}
                <a href="#tab-articles-similaires">{t}Similar articles{/t}</a
                {/if}
            
                {$WXO_PRODUCT_CROSS}
            {/if}

The resulting code compiled by Smarty is:

<?php if ((isset($_smarty_tpl->tpl_vars['WXO_PRODUCT_CROSS']->value)) && 'WXO_PRODUCT_CROSS' != '') {?>

instead of

<?php if ((isset($_smarty_tpl->tpl_vars['WXO_PRODUCT_CROSS']->value)) && $_smarty_tpl->tpl_vars['WXO_PRODUCT_CROSS']->value != '') {?>

Is it normal for "WXO_PRODUCT_CROSS" to be interpreted as a string instead of causing a compilation error?

Start by reproducing the Smarty template shown in the issue and inspect the generated PHP condition. Compare the behavior of the missing-$ expression with the expected compilation output, then check whether existing parser or compiler tests cover this case. Done means the behavior is confirmed and, if faulty, covered by a regression test.