Theme styles and scripts not printing I'm having a problem in my html.html.twig file where the styles and scripts variables are not printing anything, and when I debug with dump:

{{ dump(styles) }}  
{{ dump(scripts) }}


Both variables are empty and 'NULL' is returned.

Any suggestions on how to debug this further?
Those variables have been changed in beta16/RC1.

See HTML template head, scripts, styles and scripts_bottom replaced with placeholder_token:

Before

{{ head }}
{{ styles }}
{{ scripts }}
{{ scripts_bottom }}


After

&lt;head-placeholder token="{{ placeholder_token|raw }}"&gt;
&lt;css-placeholder token="{{ placeholder_token|raw }}"&gt;
&lt;js-placeholder token="{{ placeholder_token|raw }}"&gt;
&lt;js-bottom-placeholder token="{{ placeholder_token|raw }}"&gt;


The markup should be stable now with RC1, but when you're having trouble with a custom template, always compare it with the core default markup in the module providing it and/or the classy theme.