Python: When pass None to mx.sym.var's shape and infer, python stop working

[traveller59]

Environment info

Operating System: Windows 10 64bit
Package used (Python/R/Scala/Julia):Python
MXNet version: 0.11

Error Message:

mxnet should raise a exception instead of stop working when user pass a None(tensorflow style) shape to mx.sym.var
Code:

x = mx.sym.var('x', shape=(None, 100))
y = mx.sym.var('y', shape=(None, 100))
z = x + y
t = x** 2 + z / y
t.infer_shape()

Error:

[19:40:57] D:\Program Files (x86)\Jenkins\workspace\mxnet\mxnet\src\executor\infer_graph_attr_pass.cc:139: Check failed: is >> rshape[out_ent_id] Invalid attribute

[piiswrong]

None is not supported. Use 0 for placeholder dimension

[szha]

@apache/mxnet-committers: This issue has been inactive for the past 90 days. It has no label and needs triage.

For general "how-to" questions, our user forum (and Chinese version) is a good place to get help.

[indhub]

Please use 0 for placeholder dimension like suggested above.