%Warning-UNPACKED: t/t_union_unpacked_bad.v:9:12: Unsupported: Unpacked union
                                                : ... In instance x
    9 |    typedef union {
      |            ^~~~~
                   ... For warning description see https://verilator.org/warn/UNPACKED?v=latest
                   ... Use "/* verilator lint_off UNPACKED */" and lint_on around source to disable this message.
%Error: Exiting due to