Using '$this' when not in object context

Confirming RTBC, but DI would be the preferred way. Leaving this for the maintainer to decide.

Thinking about this a bit I think it can't use DI as the call causing this is a static call?

@saidatom could you provide a stack trace maybe to see where this comes from?

Tested;

Unpatched; Visit admin > structure > page (type) > display
Throws error message on white page of death.

Patched; Visit admin > structure > page (type) > display
Shows correct node type display form.

RTBC ✅

Thanks!