mx.symbol.softmax_cross_entropy() raises error "Not enough argument to call operator softmax_cross_entropy"

[SealLive]

Environment info

Operating System:
This error was raised on Ubuntu 14.04, Windows 10 and Mac OS X El Capitan(10.11.6)

Compiler:
gcc / Visual Studio 2013 / clang-omp

Package used:
Python

MXNet version:
0.10.1(installed from source)

Python version and distribution:
2.7.6(installed by apt-get) for Ubuntu.
2.7.12(from python.org) for Windows and Mac OS.

Error Message:

(on Mac OS)

[00:31:44] /Users/Seal/mxnet/dmlc-core/include/dmlc/logging.h:304: [00:31:44] src/core/symbolic.cc:295: Not enough argument to call operator softmax_cross_entropy

Stack trace returned 5 entries:
[bt] (0) 0   libmxnet.so                         0x0000000103289da5 _ZN4dmlc15LogMessageFatalD2Ev + 37
[bt] (1) 1   libmxnet.so                         0x0000000104a46cf9 _ZN4nnvm6Symbol7ComposeERKN4dmlc10array_viewIPKS0_EERKNSt3__113unordered_mapINS8_12basic_stringIcNS8_11char_traitsIcEENS8_9allocatorIcEEEES4_NS8_4hashISF_EENS8_8equal_toISF_EENSD_INS8_4pairIKSF_S4_EEEEEERSL_ + 8121
[bt] (2) 2   libmxnet.so                         0x0000000104a39911 NNSymbolCompose + 1345
[bt] (3) 3   _ctypes.so                          0x0000000100780417 ffi_call_unix64 + 79
[bt] (4) 4   ???                                 0x00007fff5fbfe6f0 0x0 + 140734799800048

Traceback (most recent call last):
  File "sm_ce_test.py", line 9, in <module>
    ce = mx.symbol.softmax_cross_entropy(data=data, label=label, name="sm")
  File "<string>", line 22, in softmax_cross_entropy
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mxnet-0.10.1-py2.7.egg/mxnet/_ctypes/symbol.py", line 120, in _symbol_creator
    s._compose(name=name, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mxnet-0.10.1-py2.7.egg/mxnet/symbol.py", line 449, in _compose
    self.handle, name, num_args, keys, args))
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mxnet-0.10.1-py2.7.egg/mxnet/base.py", line 85, in check_call
    raise MXNetError(py_str(_LIB.MXGetLastError()))
mxnet.base.MXNetError: [00:31:44] src/core/symbolic.cc:295: Not enough argument to call operator softmax_cross_entropy

Stack trace returned 5 entries:
[bt] (0) 0   libmxnet.so                         0x0000000103289da5 _ZN4dmlc15LogMessageFatalD2Ev + 37
[bt] (1) 1   libmxnet.so                         0x0000000104a46cf9 _ZN4nnvm6Symbol7ComposeERKN4dmlc10array_viewIPKS0_EERKNSt3__113unordered_mapINS8_12basic_stringIcNS8_11char_traitsIcEENS8_9allocatorIcEEEES4_NS8_4hashISF_EENS8_8equal_toISF_EENSD_INS8_4pairIKSF_S4_EEEEEERSL_ + 8121
[bt] (2) 2   libmxnet.so                         0x0000000104a39911 NNSymbolCompose + 1345
[bt] (3) 3   _ctypes.so                          0x0000000100780417 ffi_call_unix64 + 79
[bt] (4) 4   ???                                 0x00007fff5fbfe6f0 0x0 + 140734799800048

Minimum reproducible example

(this code runs fine on MXNet 0.9.5, but not on 0.10.1)

import mxnet as mx

ctx = mx.gpu(0)
data = mx.symbol.Variable("data")
label = mx.symbol.Variable("label")
data_nd = mx.nd.array([[1,2,3],[2,3,4]],ctx)
label_nd = mx.nd.array([1,2],ctx)

ce = mx.symbol.softmax_cross_entropy(data=data, label=label, name="sm")
exe = ce.bind(ctx=ctx, args={"data":data_nd, "label":label_nd})
exe.forward()

Steps to reproduce

Just run the python code above.

[kevinthesun]

This can be fixed by this PR: #6766

[szha]

This issue is closed due to lack of activity in the last 90 days. Feel free to ping me to reopen if this is still an active issue. Thanks!

[pppoe]

I am using mxnet-cu80 (0.11.0rc3), the issue is reproducible with the same example code.

[jonasrauber]

This error is still reproducible!

[leviswind]

This error is still reproducible on 1.3.0.

[satyakrishnagorti]

This is still an issue.

Steps to reproduce on mxnet 1.3.1.

data = mx.sym.Variable("data")
symbol = mx.syml.Variable("label")
# fails below
ce = mx.sym.softmax_cross_entropy(name="ce", data=data, label=label)