Looks like https://github.com/apache/incubator-mxnet/pull/12285 broke a ton of our test cases iterating over 3D NDArray instances (eg; MNIST) by creating an index out of range.
Stacktrace: .com/airbnb/bighead/python/bighead/ml_frameworks/mxnet/gluon.py", line 434, in transform for batch in data_iter: File "/anaconda3/envs/py36/lib/python3.6/site-packages/mxnet/io/io.py", line 228, in __next__ return self.next() File "/anaconda3/envs/py36/lib/python3.6/site-packages/mxnet/io/io.py", line 680, in next label = self.getlabel() File "/anaconda3/envs/py36/lib/python3.6/site-packages/mxnet/io/io.py", line 750, in getlabel return self._batchify(self.label) File "/anaconda3/envs/py36/lib/python3.6/site-packages/mxnet/io/io.py", line 732, in _batchify first_data = self._getdata(data_source, start=self.cursor) File "/anaconda3/envs/py36/lib/python3.6/site-packages/mxnet/io/io.py", line 694, in _getdata end = end if end is not None else data_source[0][1].shape[0] IndexError: list index out of range I’ve created an issue at https://github.com/apache/incubator-mxnet/issues/12526 We’ll be pinning to the previous build until it’s reverted/patched, but let us know if we can help provide more regression tests here. — Alfredo Luque Software Engineer Machine Learning Infrastructure Airbnb San Francisco, CA