def test_register_chain(self):
self.check_register(chain=True)
+ @contextmanager
+ def check_stderr_none(self):
+ stderr = sys.stderr
+ try:
+ sys.stderr = None
+ with self.assertRaises(RuntimeError) as cm:
+ yield
+ self.assertEqual(str(cm.exception), "sys.stderr is None")
+ finally:
+ sys.stderr = stderr
+
+ def test_stderr_None(self):
+ # Issue #21497: provide an helpful error if sys.stderr is None,
+ # instead of just an attribute error: "None has no attribute fileno".
+ with self.check_stderr_none():
+ faulthandler.enable()
+ with self.check_stderr_none():
+ faulthandler.dump_traceback()
+ if hasattr(faulthandler, 'dump_traceback_later'):
+ with self.check_stderr_none():
+ faulthandler.dump_traceback_later(1e-3)
+ if hasattr(faulthandler, "register"):
+ with self.check_stderr_none():
+ faulthandler.register(signal.SIGUSR1)
+
if __name__ == "__main__":
unittest.main()
PyErr_SetString(PyExc_RuntimeError, "unable to get sys.stderr");
return NULL;
}
+ if (file == Py_None) {
+ PyErr_SetString(PyExc_RuntimeError, "sys.stderr is None");
+ return NULL;
+ }
}
result = _PyObject_CallMethodId(file, &PyId_fileno, "");