%Warning-WIDTH: t/t_flag_context_bad.v:9:19: Operator ASSIGNW expects 3 bits on the Assign RHS, but Assign RHS's CONST '5'h1f' generates 5 bits.
                                           : ... In instance t
                ... For warning description see https://verilator.org/warn/WIDTH?v=latest
                ... Use "/* verilator lint_off WIDTH */" and lint_on around source to disable this message.
%Warning-UNUSEDSIGNAL: t/t_flag_context_bad.v:9:15: Signal is not used: 'foo'
                                                  : ... In instance t
%Error: Exiting due to