docs: def get_traceback(self):
          """Calling this marks the PyTraceback as escaped, i.e. it becomes
          accessible and inspectable by app-level Python code.  For the JIT.
          Note that this has no effect if there are already several traceback
          frames recorded, because in this case they are already marked as
          escaping by executioncontext.leave() being called with
          got_exception=True.
          """
          from pypy.interpreter.pytraceback import PyTraceback
          tb = self._application_traceback
          if tb is not None and isinstance(tb, PyTraceback):
              tb.frame.mark_as_escaped()
          return tb