%Error: t/t_langext_2.v:49:21: syntax error, unexpected case
   49 |             unique0 case (i)
      |                     ^~~~
        ... See the manual at https://verilator.org/verilator_doc.html?v=latest for more assistance.
%Error: Cannot continue
        ... This fatal error may be caused by the earlier error(s); resolve those first.