[GitHub] roggiezhang-nv opened a new issue #8494: Autograd bug in mxnet-cu80: 0.12

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

roggiezhang-nv opened a new issue #8494: Autograd bug in mxnet-cu80: 0.12
URL: https://github.com/apache/incubator-mxnet/issues/8494
 
 
   Note: Providing complete information in the most concise form is the best way to get help. This issue template serves as the checklist for essential information to most of the technical issues.
   
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   ## Description
   Autograd behaves not properly.
   
   ## Environment info (Required)
   Package used (Python/R/Scala/Julia): Python
   (I'm using ...)
   
   ## Error Message:
   (Paste the complete error message, including stack trace.)
   
   ## Minimum reproducible example
   (If you are using your own code, please provide a short script that reproduces the error. Otherwise, please provide link to the existing example.)
   
   
   ```
   Snippet:
   
   import mxnet as mx
   
   a = mx.random.normal(shape = (3, 3, 3))
   a.attach_grad()
   
   b = 0
   with mx.autograd.record():
       b = a
   
   b.backward()
   print(a.grad)
   
   output: [[[ 0.  0.  0.]
     [ 0.  0.  0.]
     [ 0.  0.  0.]]
   
    [[ 0.  0.  0.]
     [ 0.  0.  0.]
     [ 0.  0.  0.]]
   
    [[ 0.  0.  0.]
     [ 0.  0.  0.]
     [ 0.  0.  0.]]]
   <NDArray 3x3x3 @cpu(0)>
   ```
   
   ## Steps to reproduce
   (Paste the commands you ran that produced the error.)
   
   1. Run the above snippet.
   2.
   
   ## What have you tried to solve it?
   
   1. Assign b = a + 1
   2.
   

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