code: def test_incorrect_backward_binary():
      # See the comment of test_incorrect_backward_unary().
      def fprop(xs):
          x, y = xs
          return ((x * y).as_grad_stopped() + x + y,)
  
      with pytest.raises(chainerx.GradientCheckError):
          _check_backward_binary(fprop)
  
file_path: chainer/tests/chainerx_tests/unit_tests/test_check_backward.py
imports: import pytest
  import chainerx
label_desc: Use image node_id 6 for calling a global function with example usage: test_incorrect_backward_binary() and returns: unknown