anchor.diff:  
       end subroutine get_sys_t
   
  -    subroutine push_sys(lua_state, sys)
  +    subroutine push_sys(lua_state, sys, new)
   
           ! Add a table containing the passed system to the lua stack for returning
   
  
positive.code:         end if
  
          call warn_unused_args(lua_state, keys, opts)
          call aot_table_close(lua_state, opts)
  
          call push_sys(lua_state, sys)
          nreturn = 1
  
      end function lua_ringium
  
negative.code:         !   lua_state: flu/Lua state to which the HANDE API is added.
          ! In:
          !   sys: the sys object to return to lua
          !   new: if false, do not create a new system object
  
          use, intrinsic :: iso_c_binding, only: c_loc
          use flu_binding, only: flu_State, flu_pushlightuserdata, flu_pushstring, flu_settable, flu_pushcclosure, fluL_setmetatable
  