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Posted to commits@mxnet.apache.org by GitBox <gi...@apache.org> on 2020/08/16 04:12:15 UTC
[GitHub] [incubator-mxnet] leeyeetonn opened a new issue #18940: Floating point exception in mxnet.ndarray.op.SequenceReverse
leeyeetonn opened a new issue #18940:
URL: https://github.com/apache/incubator-mxnet/issues/18940
## Description
(A clear and concise description of what the bug is.)
`mxnet.ndarray.op.SequenceReverse` has floating point exception when given `data` has 0 in its shape. Please see the provided code for example.
### Error Message
(Paste the complete error message. Please also include stack trace by setting environment variable `DMLC_LOG_STACK_TRACE_DEPTH=10` before running your script.)
>Floating point exception (core dumped)
## To Reproduce
(If you developed your own code, please provide a short script that reproduces the error. For existing examples, please provide link.)
```python
import mxnet
import numpy as np
data = mxnet.nd.array(np.random.rand(0,1,1))
mxnet.ndarray.op.SequenceReverse(data)
```
### Steps to reproduce
(Paste the commands you ran that produced the error.)
1. run the provided code in python interpreter or as a script
2.
## What have you tried to solve it?
1.
2.
## Environment
We recommend using our script for collecting the diagnositc information. Run the following command and paste the outputs below:
```
curl --retry 10 -s https://raw.githubusercontent.com/dmlc/gluon-nlp/master/tools/diagnose.py | python
# paste outputs here
```
Got 404 when trying to get the script.
Some environment information:
* OS: ubuntu 18.04
* Python: 3.7.6
* pip: 20.0.2
* numpy: 1.18.5
* mxnet: 1.6.0
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[GitHub] [incubator-mxnet] szha commented on issue #18940: Floating point exception in mxnet.ndarray.op.SequenceReverse
Posted by GitBox <gi...@apache.org>.
szha commented on issue #18940:
URL: https://github.com/apache/incubator-mxnet/issues/18940#issuecomment-678076744
So here's the problem:
```
% DMLC_LOG_STACK_TRACE_DEPTH=150 MXNET_ENGINE_TYPE=NaiveEngine lldb python3.7 -- test_18940.py
(lldb) target create "python3.7"
Current executable set to 'python3.7' (x86_64).
(lldb) settings set -- target.run-args "test_18940.py"
(lldb) run
Process 78879 launched: '/usr/local/bin/python3.7' (x86_64)
Process 78879 stopped
* thread #2, stop reason = exec
frame #0: 0x0000000100006000 dyld`_dyld_start
dyld`_dyld_start:
-> 0x100006000 <+0>: popq %rdi
0x100006001 <+1>: pushq $0x0
0x100006003 <+3>: movq %rsp, %rbp
0x100006006 <+6>: andq $-0x10, %rsp
(lldb) cont
Process 78879 resuming
[23:52:34] ../src/engine/engine.cc:55: MXNet start using engine: NaiveEngine
Process 78879 stopped
* thread #2, queue = 'com.apple.main-thread', stop reason = EXC_ARITHMETIC (code=EXC_I386_DIV, subcode=0x0)
frame #0: 0x0000000115861a13 libmxnet.dylib`mxnet::op::SequenceReverseOp<mshadow::cpu, float, float>::Forward(this=0x0000000123da0db0, ctx=0x00007ffeefbfc2b0, in_data=0x0000000127b7a2f8, req=0x00007ffeefbfc310, out_data=0x0000000127b7a340, aux_args=0x0000000127b7a328) at sequence_reverse-inl.h:139
136 auto max_seq_len = in_data[seq_reverse::kData].size(0);
137 auto n = in_data[seq_reverse::kData].size(1);
138 auto total_size = in_data[seq_reverse::kData].Size();
-> 139 auto rest_dim = static_cast<int>(total_size / n / max_seq_len);
140
141 Shape<3> s3 = Shape3(max_seq_len, n, rest_dim);
142 Tensor<xpu, 3, DType> data =
```
https://github.com/apache/incubator-mxnet/blob/9bdd4d6347c284770ee5bfe5ae98f1dabc283829/src/operator/sequence_reverse-inl.h#L139
The code needs to guard against zero-size array for right operand of `/`, and we should add a smoke test to guard against such problem in this op, similar to https://github.com/apache/incubator-mxnet/pull/18972/files
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[GitHub] [incubator-mxnet] pranjii commented on issue #18940: Floating point exception in mxnet.ndarray.op.SequenceReverse
Posted by GitBox <gi...@apache.org>.
pranjii commented on issue #18940:
URL: https://github.com/apache/incubator-mxnet/issues/18940#issuecomment-941916756
Could I get this assigned??
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[GitHub] [incubator-mxnet] vijaya-lakshmi-venkatraman commented on issue #18940: Floating point exception in mxnet.ndarray.op.SequenceReverse
Posted by GitBox <gi...@apache.org>.
vijaya-lakshmi-venkatraman commented on issue #18940:
URL: https://github.com/apache/incubator-mxnet/issues/18940#issuecomment-1046944784
Hello,
I see a PR merged for this issue.
Is this still open?
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[GitHub] [incubator-mxnet] pranjii commented on issue #18940: Floating point exception in mxnet.ndarray.op.SequenceReverse
Posted by GitBox <gi...@apache.org>.
pranjii commented on issue #18940:
URL: https://github.com/apache/incubator-mxnet/issues/18940#issuecomment-941916756
Could I get this assigned??
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