[WIP] Improve guarding of `Py_DECREF`, `Py_XDECREF` triggered from C++ dtors#5864

rwgk wants to merge 1 commit intopybind:masterpybind/pybind11:masterfrom

rwgk:decref_in_cpp_dtorrwgk/pybind11:decref_in_cpp_dtorCopy head branch name to clipboard