%Warning-UNUSED: t/t_lint_unused_bad.v:17:15: Bits of signal are not used: 'assunu1'[5:1]
                                            : ... In instance t.sub
   17 |    wire [5:0] assunu1 = 0;   
      |               ^~~~~~~
                 ... Use "/* verilator lint_off UNUSED */" and lint_on around source to disable this message.
%Warning-UNDRIVEN: t/t_lint_unused_bad.v:21:17: Bits of signal are not driven: 'udrb2'[14:13,11]
                                              : ... In instance t.sub
   21 |    wire [15:10] udrb2;   
      |                 ^~~~~
%Warning-UNUSED: t/t_lint_unused_bad.v:26:15: Signal is not driven, nor used: 'unu3'
                                            : ... In instance t.sub
   26 |    wire       unu3;   
      |               ^~~~
%Warning-UNUSED: t/t_lint_unused_bad.v:28:15: Bits of signal are not driven, nor used: 'mixed'[3]
                                            : ... In instance t.sub
   28 |    wire [3:0] mixed;   
      |               ^~~~~
%Warning-UNUSED: t/t_lint_unused_bad.v:28:15: Bits of signal are not used: 'mixed'[2]
                                            : ... In instance t.sub
   28 |    wire [3:0] mixed;   
      |               ^~~~~
%Warning-UNDRIVEN: t/t_lint_unused_bad.v:28:15: Bits of signal are not driven: 'mixed'[1]
                                              : ... In instance t.sub
   28 |    wire [3:0] mixed;   
      |               ^~~~~
%Error: Exiting due to