%Error: t/t_hier_block_threads_bad.v:23:8: Hierarchical blocks cannot be scheduled on more threads than in thread pool, threads = 4 hierarchical block threads = 8
                                         : ... note: In instance 't.genblk1[1].hierCore'
   23 | module Core(input clk); /*verilator hier_block*/ 
      |        ^~~~
        ... See the manual at https://verilator.org/verilator_doc.html?v=latest for more assistance.
%Error-UNSUPPORTED: t/t_hier_block_threads_bad.vlt:9:1: Specifying workers for nested hierarchical blocks
    9 | hier_workers -module "SubCore" -workers 8
      | ^~~~~~~~~~~~
                    ... For error description see https://verilator.org/warn/UNSUPPORTED?v=latest
%Error: Exiting due to