PHP 8 and wrong input of 'format' filter breaks template rendering

[KacerCZ]

Hi, I'm using Twig 2.14.4 with PHP 8.0.3 in CMS.

Template snippet: 'You have % z new comments' | format( newCommentCount )

If user has error in input of format filter template rendering ends with ValueError: Unknown format specifier "z" exception. PHP prior 8.0 only issued warning, returned false and rendering of template continued.

Possible solution would be to wrap sprintf call to try/catch block to prevent end of template rendering.

[stof]

To me, the actual fix is to pass valid values.