UVM Bug (uvm_sequence_base::kill)

uvm_bug.sv

package test_pkg;
  timeunit  1ns;

  import  uvm_pkg::*;
  `include  "uvm_macros.svh"

  class inner_sequence extends uvm_sequence;
    task body();
      #(1s);
    endtask

    task start(
      uvm_sequencer_base  sequencer,
      uvm_sequence_base   parent_sequence = null,
      int                 this_priority   = -1,
      bit                 call_pre_post   = 1
    );
      super.start(sequencer, parent_sequence, this_priority, call_pre_post);
      `uvm_info("INNER", "finished !", UVM_MEDIUM)
    endtask

    function new(string name = "inner_sequence");
      super.new(name);
    endfunction

    `uvm_object_utils(inner_sequence)
  endclass

  class outer_sequence extends uvm_sequence;
    task body();
      inner_sequence  inner;
      fork
        `uvm_do(inner)
      join
    endtask

    task start(
      uvm_sequencer_base  sequencer,
      uvm_sequence_base   parent_sequence = null,
      int                 this_priority   = -1,
      bit                 call_pre_post   = 1
    );
      super.start(sequencer, parent_sequence, this_priority, call_pre_post);
      `uvm_info("OUTER", "finished !", UVM_MEDIUM)
    endtask

    function new(string name = "outer_sequence");
      super.new(name);
    endfunction

    `uvm_object_utils(outer_sequence)
  endclass

  class test extends uvm_test;
    uvm_sequencer sequencer;

    function void build_phase(uvm_phase phase);
      super.build_phase(phase);
      sequencer = uvm_sequencer#()::type_id::create("sequencer", this);
      uvm_config_db #(uvm_object_wrapper)::set(sequencer, "run_phase", "default_sequence", outer_sequence::type_id::get());
    endfunction

    task main_phase(uvm_phase phase);
      phase.raise_objection(this);
      #(1us);
      phase.drop_objection(this);
    endtask

    function new(string name = "test", uvm_component parent = null);
      super.new(name, parent);
    endfunction

    `uvm_component_utils(test)
  endclass
endpackage

module top;
  import  uvm_pkg::*;
  import  test_pkg::*;
  initial begin
    run_test("test");
  end
endmodule