%Error: t/t_enum_x_bad.v:8: Enum value with X/Zs cannot be assigned to non-fourstate type (IEEE 1800-2017 6.19)
                          : ... In instance t
   enum bit [1:0] { BADX = 2'b1x } BAD1;
                    ^~~~
%Error: t/t_enum_x_bad.v:11: Enum value that is unassigned cannot follow value with X/Zs (IEEE 1800-2017 6.19)
                           : ... In instance t
                      e1
                      ^~
%Error: Exiting due to