verilator/test_regress/t/t_fork_func_bad.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2020 Wilson Snyder
// SPDX-License-Identifier: CC0-1.0

module t;

  function int f;
    fork
      return 0;  // Illegal 9.3.2
    join_none
  endfunction

  int i;

  initial begin
    i = f();
  end

endmodule