verilator/test_regress/t/t_math_countbits_bad.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain, for
// any use, without warranty, 2020 Yossi Nivin.
// SPDX-License-Identifier: CC0-1.0

module t(/*AUTOARG*/
   // Inputs
   clk
   );
   input clk;

   integer count;
   assign count = $countbits(32'h123456, '0, '1, 'x, 'z);

endmodule