Noticed a compilation problem with " --with-debug-level=optimized" configured, e.g:

src/hotspot/share/oops/method.cpp:2450:7: error: 'valid_itable_index' was not declared in this scope; did you mean 'invalid_vtable_index'?
 2450 | if (valid_itable_index())
      | ^~~~~~~~~~~~~~~~~~
      | invalid_vtable_index