code: def check_unstride_backward(self, xp):
      x = xp.arange(12, dtype=self.dtype).reshape((3, 4))[::-1]
      v = chainer.Variable(x)
      y = F.as_strided(v, (12,), (1,), 0)
      y.grad = xp.ones((12,), dtype=self.dtype)
      with self.assertRaises(TypeError):
          (gx,) = chainer.grad((y,), (v,))
  
imports: import unittest
  import numpy
  import chainer
  from chainer import cuda
  import chainer.functions
  from chainer.functions.array.as_strided import _stride_array
  from chainer import testing
label_desc: Use image node_id 7 for calling the TestAsStridedBackwardInvalidType obj's underlying member method code with example usage: obj.check_unstride_backward(xp) without return types