verilator/test_regress/t/t_case_x_bad.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed into the Public Domain, for any use,
// without warranty, 2005-2007 by Wilson Snyder.

module t (/*AUTOARG*/
   // Inputs
   value
   );

   input [3:0] value;
   always @ (/*AS*/value) begin
      casex (value)
        default: $stop;
      endcase
      case (value)
        4'b0000: $stop;
        4'b1xxx: $stop;
        default: $stop;
      endcase
   end

endmodule