Native encoder fails to convert object decoded by DER

Hi. I would very much appreciate advice on how to move forward. When using the native encoder to obtain python built-ins from an object decoded with DER, I get the error: AttributeError: 'tuple' object has no attribute 'tagClass'. My use of pyasn1 is straightforward:

from pyasn1.codec.der.decoder import decode
from pyasn1.codec.native.encoder import encode

dictionary = encode(decode(der)[0])

Stepping through the source code as it executes reveals that the call to tag.TagSet, below, is where the AttributeError is raised.

class Encoder:

        try:
             concreteEncoder = self.__typeMap[value.typeId]
        except KeyError:
            # use base type for codec lookup to recover untagged types
            baseTagSet = tag.TagSet(value.tagSet.baseTag, value.tagSet.baseTag)

Below is the output from the pyasn1 debugger:

SetOf:
 Sequence:
  field-0=lbl1
  field-1=
 Sequence:
  field-0=lbl2
  field-1=0
 Sequence:
  field-0=lbl3
  field-1=0
 SequenceOf:
  lbl4  gm Sequence:
  field-0=lbl5
  field-1=1718187085
 SequenceOf:
  lbl6  ZoneFit metadata SequenceOf:
  lbl7  ZoneFit metadata SequenceOf:
  lbl8  com.mygym.fit.metadata Sequence:
  field-0=strt
  field-1=20170410174341.023814Z
 Sequence:
  field-0=stop
  field-1=20170410174341.023814Z
 SequenceOf:
  desc  ipso facto presto change. SequenceOf:
  lbla  EC5DDE8E-B486-4FAE-AC27-95FE53AA5288 Sequence:
  field-0=status
  field-1=5681a7954094305bf604e2214479950496e693e94c69c0c71e7097115f0250a9+2fcae427f4bf8557cfff36110ea92bbdbdcc53fa8d88275ed2b6b8e5fecdaa85

...remaining substrate is: <none>
2018-06-08 14:26:08,142 pyasn1: decoder left scope , call completed

…and here is another, different example:

2018-06-08 14:14:58,340 pyasn1: codec SetOrSetOfDecoder yields type SetOf, value:
SetOf:
 SequenceOf:
  lbl1   SequenceOf:
  lbl2   Sequence:
  field-0=lbl3
  field-1=
 Sequence:
  field-0=lbl4
  field-1=0
 Sequence:
  field-0=lbl5
  field-1=0
 SequenceOf:
  lbl6  gm SequenceOf:
  lbl7  AnotherTransaction1234 Sequence:
  field-0=lbl8
  field-1=20170410181013.631371Z
 Sequence:
  field-0=lbl9
  field-1=20170410181013.631371Z
 SequenceOf:
  lbla  AnotherTransaction1234 SequenceOf:
  lblb  006952772G.com.mygym.homegymfit0 Sequence:
  field-0=UserID
  field-1=98E0F442-E181-4C66-8126-1751D99F474E

...remaining substrate is: <none>
2018-06-08 14:14:58,340 pyasn1: decoder left scope , call completed

[etingof]

Thank you for your samples! I think this is indeed a bug which should be fixed in #132 . It would be awesome if you could re-test your application with this fix applied.

[Commodore1024]

Forgive me, I am no expert in python. i pulled your latest commit:

commit 939be5fabe8c8ed8fcb334b07c84349f99cb0e59
Author: Ilya Etingof <[e-mail]>
Date:   Tue Jul 3 08:37:13 2018 +0200

To make this library available to my project, i ran these commands in the pyasn1 project folder, which concluded with debugging output:

pip uninstall pyasn1
python setup.py build
python setup.py install

<output omitted>

Processing pyasn1-0.4.3-py2.7.egg
Copying pyasn1-0.4.3-py2.7.egg to lib/python2.7/site-packages
Adding pyasn1 0.4.3 to easy-install.pth file

Installed lib/python2.7/site-packages/pyasn1-0.4.3-py2.7.egg
Processing dependencies for pyasn1==0.4.3
Finished processing dependencies for pyasn1==0.4.3

… and now ‘pip list’ shows pyasn1 0.4.3