[GitHub] [incubator-mxnet] mazeltovlee opened a new issue #20870: MXNet sym.Convolution can run even when the declared shape of variable is incorrect

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

mazeltovlee opened a new issue #20870:
URL: https://github.com/apache/incubator-mxnet/issues/20870


   ## Description
   `mx.sym.Convolution` can still work even when the shape of `mx.sym.Variable` is incorrect.
   
   
   ## To Reproduce
   
   
   ### Steps to reproduce
   ```
   import mxnet as mx
   net = mx.symbol.Variable('data')
   net = mx.sym.reshape(data=net, shape=(0, 10, 10, 3))
   net = mx.sym.transpose(data=net, axes=[0,3,1,2])
   
   weight = mx.symbol.Variable("conv2d_1/kernel1", shape=(3, 1e+10, 3, 3), stype="default", dtype=np.float32)
   weight = mx.symbol.transpose(data=weight, axes=[0,1,2,3])
   bias = mx.symbol.Variable("conv2d_1/bias1", shape=(3,))
   net = mx.symbol.Convolution(data=net, name="conv2d_1/conv2d3",
                                 kernel=(3, 3), stride=(1, 1), pad=(),
                                 num_filter=3, weight=weight,
                                 dilate=(1,1), bias=bias)
   import numpy as np
   input_shape = (10, 10, 10, 3)
   x = np.random.rand(*input_shape)
   e = net.bind(mx.cpu(), {'data': mx.nd.array(x), "conv2d_1/kernel1": mx.nd.array(np.random.rand(3,3,3,3)), "conv2d_1/bias1": mx.nd.array(np.random.rand(3,))})
   e.forward()
   ```
   When running the above code, the symbolic model `e` can still output a reasonable result even though I have declared the shape of the weight variable to be **an unreasonable value: shape=(3, 1e+10, 3, 3)**. It seems that mxnet will not refer to the declared shape in `mx.Variable`, but intuitively speaking, setting the unreasonable variable shape while model can still run may be misleading. 
   
   I am wondering if you can add some shape checks between the declared variable shape and the actual bound data shape.


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[GitHub] [incubator-mxnet] github-actions[bot] commented on issue #20870: MXNet sym.Convolution can run even when the declared shape of variable is incorrect

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

github-actions[bot] commented on issue #20870:
URL: https://github.com/apache/incubator-mxnet/issues/20870#issuecomment-1029309475


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