%Warning-SIDEEFFECT: t/t_lint_sideeffect_bad.v:12:13: Expression side effect may be mishandled
                                                    : ... Suggest use a temporary variable in place of this expression
   12 |       case ($c("1"))
      |             ^~
                     ... For warning description see https://verilator.org/warn/SIDEEFFECT?v=latest
                     ... Use "/* verilator lint_off SIDEEFFECT */" and lint_on around source to disable this message.
%Warning-SIDEEFFECT: t/t_lint_sideeffect_bad.v:13:10: Expression side effect may be mishandled
                                                    : ... Suggest use a temporary variable in place of this expression
   13 |         1: $stop;
      |          ^
%Warning-SIDEEFFECT: t/t_lint_sideeffect_bad.v:14:10: Expression side effect may be mishandled
                                                    : ... Suggest use a temporary variable in place of this expression
   14 |         2: $stop;
      |          ^
%Warning-SIDEEFFECT: t/t_lint_sideeffect_bad.v:15:10: Expression side effect may be mishandled
                                                    : ... Suggest use a temporary variable in place of this expression
   15 |         3: $stop;
      |          ^
%Error: Exiting due to