createTemplate with empty string

[peterrehm]

As discussed in #1706 and #1641 (comment) the way to render strings is as follows:

$string = 'Hello, {{ name }}';
$template = $env->createTemplate($string);
echo $template->render(array('name' => 'Bob')); // Hello, Bob

A common use case for this is customization based on user input. However if you render user input it could happen that the template is empty which leads to errors if you then call render on that template.

I am seeing the error as follows:

Template "__string_template__da47b0fa50ef004786efc7745172ce3402223a0f96b70d8f9d0bbbc2f70589a7" is not defined.

I would assume even if you pass an empty string as template everything should work, if I use a normal template the content could be empty as well. If someone confirms I might be able to look into this.

[peterrehm]

Closing the issue as per #1936 a fix is not wanted.