Issue with eval_ckpt_opt_level=2 Causing Compilation Error

[Minamoto25]

I found that by default, the eval_ckpt_opt_level in build_configs.yaml is set to 1. With this setting, I can successfully compile and run the program. However, when I change the value to 2, I encounter the following error:

# build_PhOS-Core.log
In file included from ../pos/include/workspace.h:32,
                 from ../pos/src/worker.cpp:27:
../pos/include/client.h:535:93: note: format string is defined here
  535 |                 "no handle manager with specified type registered, this is a bug: type_id(%lu)", rid
      |                                                                                           ~~^
      |                                                                                             |
      |                                                                                             long unsigned int
      |                                                                                           %u
../pos/src/worker.cpp: In member function ‘void POSWorker::__checkpoint_async_thread()’:
../pos/src/worker.cpp:540:23: error: ‘POSCommand_QE_t’ {aka ‘struct POSCommand_QE’} has no member named ‘checkpoint_handles’
  540 |     for(set_iter=cmd->checkpoint_handles.begin(); set_iter!=cmd->checkpoint_handles.end(); set_iter++){
      |                       ^~~~~~~~~~~~~~~~~~
../pos/src/worker.cpp:540:66: error: ‘POSCommand_QE_t’ {aka ‘struct POSCommand_QE’} has no member named ‘checkpoint_handles’
  540 |     for(set_iter=cmd->checkpoint_handles.begin(); set_iter!=cmd->checkpoint_handles.end(); set_iter++){
      |                                                                  ^~~~~~~~~~~~~~~~~~

In file included from ../pos/src/worker.cpp:25:
../pos/src/worker.cpp: In member function ‘pos_retval_t POSWorker::__process_cmd(POSCommand_QE_t*)’:
../pos/src/worker.cpp:721:26: error: ‘POSCommand_QE_t’ {aka ‘struct POSCommand_QE’} has no member named ‘checkpoint_handles’
  721 |         if(unlikely(cmd->checkpoint_handles.size() == 0)){
      |                          ^~~~~~~~~~~~~~~~~~
../pos/include/common.h:27:49: note: in definition of macro ‘unlikely’
   27 |     #define unlikely(x)     __builtin_expect(!!(x), 0)
      |                                                 ^
../pos/src/worker.cpp:768:36: error: ‘POSCommand_QE_t’ {aka ‘struct POSCommand_QE’} has no member named ‘checkpoint_handles’
  768 |         for(handle_set_iter = cmd->checkpoint_handles.begin();
      |                                    ^~~~~~~~~~~~~~~~~~
../pos/src/worker.cpp:769:37: error: ‘POSCommand_QE_t’ {aka ‘struct POSCommand_QE’} has no member named ‘checkpoint_handles’
  769 |             handle_set_iter != cmd->checkpoint_handles.end();
      |                                     ^~~~~~~~~~~~~~~~~~

It seems that the POSCommand_QE_t structure indeed does not contain a member named checkpoint_handles.
As I understand, setting this optimization level to 2 is intended to enable more advanced optimizations (e.g., asynchronous checkpointing). Is this correct? Could you please provide guidance on how to compile and run the program with this setting?