{include} is a NOP in 3.1.29?

[pehrsoderman]

I may have encountered a bug after upgrading to Ubuntu 16.04, smarty 3.1.29 and PHP7. For me, the {include} seems to be a NOP. If I do something like this:

{include file='file_that_exists.tpl'}
{include file='file_that_does_not_exist.tpl'}
{function_name}

in a template, it compiles without complaining. The content of file_that_exists.tpl is not included, so if file_that_exists.tpl contains function_name, I get a crash that looks like this:

Fatal error: Uncaught --> Smarty Compiler: Syntax error in template "file:/var/www/views/index.tpl" on line 208 "{function_name}" unknown tag "function_name" <-- thrown in /usr/share/php/smarty3/sysplugins/smarty_internal_templatecompilerbase.php on line 208

This may be a variation of the issue reported as #240.

[pehrsoderman]

After some further exploration, it turns out that this problem shows up when going from Smarty 3.1.27 to 3.1.28.

[pehrsoderman]

This was solved by $smarty->merge_compiled_includes = true;