sxjscience opened a new pull request #17683: Fix reverse shape inference in 
LayerNorm
URL: https://github.com/apache/incubator-mxnet/pull/17683
 
 
   Fix https://github.com/apache/incubator-mxnet/issues/17654. Now, the user 
will see an error message if the `in_channels` does not match with the 
corresponding dimension in the input
   
   After the PR, the following will raise an error
   ```python
   import mxnet as mx
   from mxnet.gluon import nn
   net = nn.LayerNorm(in_channels=10)
   net.initialize()
   net.hybridize()
   out = net(mx.nd.ones((2, 11)))  # Trigger the error
   ```
   
   Error:
   ```
   MXNetError: MXNetError: Error in operator layernorm0_layernorm0: Shape 
inconsistent, Provided = [10], inferred shape=[11]
   
   ```
   

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