%Error: t/t_number_bad.v:9:29: Number is missing value digits: 32'd
    9 |    parameter integer FOO2 = 32'd-6;   
      |                             ^~~~
%Error: t/t_number_bad.v:10:29: Number is missing value digits: 32'd
   10 |    parameter integer FOO3 = 32'd;
      |                             ^~~~
%Error: t/t_number_bad.v:11:29: Number is missing value digits: 32'h
   11 |    parameter integer FOO4 = 32'h;
      |                             ^~~~
%Error: Exiting due to