I'm investigating a memory leak in 3.10, and while looking at the offending commit I stumbled upon this: in ceval.c:PyEval_EvalCodeEx, there's this allocation:

    PyObject **kwargs = PyMem_Malloc(sizeof(PyObject *)*kwcount);

The problem is that this isn't ever freed. And `kwargs` isn't used anywhere in the function body. It seems to me that this is silently leaking memory.