(gdb) set args ex.py
(gdb) break ceval.c:4042
Breakpoint 1 at 0x10009e02c: file ceval.c, line 4042.
(gdb) run
Starting program: /Users/dannej/Documents/Uppsala Universitet/lsp/CPython/dan_edu/python.exe ex.py
Reading symbols for shared libraries ++................................ done

Breakpoint 1, PyEval_EvalFrameEx (f=0x7fff5fbfa430, throwflag=1606394928) at ceval.c:4042
4042            if (PyFunction_Check(func))
(gdb) l
4037                na++;
4038                n++;
4039            } else
4040                Py_INCREF(func);
4041            READ_TIMESTAMP(*pintr0);
4042            if (PyFunction_Check(func))
4043                x = fast_function(func, pp_stack, n, na, nk);
4044            else
4045                x = do_call(func, pp_stack, na, nk);
4046            READ_TIMESTAMP(*pintr1);
(gdb) s
4045                x = do_call(func, pp_stack, na, nk);
(gdb) print func
No symbol "func" in current context.
(gdb)