[GitHub] [incubator-mxnet] sxjscience commented on issue #18789: [bug] Autograd throws an exception that was not caught in MXNet 1.6

[GitBox <gi...@apache.org>]

sxjscience commented on issue #18789:
URL: https://github.com/apache/incubator-mxnet/issues/18789#issuecomment-673702457


   Actually I cannot reproduce this error. @yzh119 Would you try again with the latest nightly version and with the following code snippet?
   
   To install the nightly version:
   
   ```
   # Install the version with CUDA 10.0
   python3 -m pip install -U --pre "mxnet-cu100>=2.0.0b20200802" -f https://dist.mxnet.io/python
   
   # Install the version with CUDA 10.1
   python3 -m pip install -U --pre "mxnet-cu101>=2.0.0b20200802" -f https://dist.mxnet.io/python
   
   # Install the version with CUDA 10.2
   python3 -m pip install -U --pre "mxnet-cu102>=2.0.0b20200802" -f https://dist.mxnet.io/python
   
   # Install the cpu-only version
   python3 -m pip install -U --pre "mxnet>=2.0.0b20200802" -f https://dist.mxnet.io/python
   ```
   
   ```python
   from mxnet import nd
   import mxnet as mx
   mx.npx.set_np()
   x = mx.np.zeros((10,))
   x.attach_grad()
   
   class Op(mx.autograd.Function):
       def forward(self, x):
           out = x + 1
           return out
   
       def backward(self, grad):
           grad_x = grad
           return grad_x
   
   op = Op()
   with mx.autograd.record():
       y = op(x)
       y.sum().backward()
   
   print(x.grad)
   ```


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