Set visited on entry frame

Author: markshannon

Python/ceval.c

@@ -817,6 +817,7 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, _PyInterpreterFrame *frame, int
     entry_frame.instr_ptr = (_Py_CODEUNIT *)_Py_INTERPRETER_TRAMPOLINE_INSTRUCTIONS + 1;
     entry_frame.stackpointer = entry_frame.localsplus;
     entry_frame.owner = FRAME_OWNED_BY_CSTACK;
+    entry_frame.visited = 0;
     entry_frame.return_offset = 0;
     /* Push frame */
     entry_frame.previous = tstate->current_frame;