%Error: t/t_clocking_bad5.v:29:20: Duplicate declaration of CLOCKING 'ck': '$global_clock'
   29 |    global clocking ogck @(posedge clk); endclocking
      |                    ^~~~
        t/t_clocking_bad5.v:26:20: ... Location of original declaration
   26 |    global clocking ck @(posedge clk); endclocking
      |                    ^~
%Error: t/t_clocking_bad5.v:32:20: Duplicate declaration of CLOCKING 'ogck': '$global_clock'
   32 |    global clocking ck @(posedge clk); endclocking
      |                    ^~
        t/t_clocking_bad5.v:29:20: ... Location of original declaration
   29 |    global clocking ogck @(posedge clk); endclocking
      |                    ^~~~
%Error: t/t_clocking_bad5.v:32:20: Duplicate declaration of CLOCKING 'ck': 'ck'
   32 |    global clocking ck @(posedge clk); endclocking
      |                    ^~
        t/t_clocking_bad5.v:26:20: ... Location of original declaration
   26 |    global clocking ck @(posedge clk); endclocking
      |                    ^~
%Error: t/t_clocking_bad5.v:16:14: Can't find definition of variable: '$global_clock'
   16 |    always @ ($global_clock) $display;
      |              ^~~~~~~~~~~~~
%Error: Exiting due to