%Error-UNSUPPORTED: t/t_assert_property_var_unsup.v:17:11: Unsupported: property variable declaration
   17 |       int prevcyc;
      |           ^~~~~~~
                    ... For error description see https://verilator.org/warn/UNSUPPORTED?v=latest
%Error: t/t_assert_property_var_unsup.v:18:7: syntax error, unexpected '(', expecting endproperty
   18 |       (valid, prevcyc = cyc) |=> (cyc == prevcyc + 1);
      |       ^
%Error-UNSUPPORTED: t/t_assert_property_var_unsup.v:24:31: Unsupported: property variable default value
   24 |    property with_def(int nine = 9);
      |                               ^
%Error: Internal Error: t/t_assert_property_var_unsup.v:7:8: ../V3ParseSym.h:#: Symbols suggest ending PROPERTY 'prop' but parser thinks ending MODULE 't'
    7 | module t ( 
      |        ^
                        ... See the manual at https://verilator.org/verilator_doc.html for more assistance.