Uper encoding failed with 'Odd-length string error" about asn1tools HOT 3 CLOSED

>>> import asn1tools
>>> foo = asn1tools.compile_string('A DEFINITIONS AUTOMATIC TAGS ::= BEGIN A ::= SEQUENCE SIZE (1..10) OF NULL END', 'uper')
>>> foo.encode('A', [])
Traceback (most recent call last):
  File "<input>", line 1, in <module>
    foo.encode('A', [])
  File "/home/erik/workspace/asn1tools/asn1tools/compiler.py", line 138, in encode
    return type_.encode(data, **kwargs)
  File "/home/erik/workspace/asn1tools/asn1tools/codecs/uper.py", line 283, in encode
    return encoder.as_bytearray()
  File "/home/erik/workspace/asn1tools/asn1tools/codecs/per.py", line 247, in as_bytearray
    return bytearray(binascii.unhexlify(value))
binascii.Error: Odd-length string

>>> foo.encode('A', [], check_constraints=True)
Traceback (most recent call last):
  File "<input>", line 1, in <module>
    foo.encode('A', [], check_constraints=True)
  File "/home/erik/workspace/asn1tools/asn1tools/compiler.py", line 136, in encode
    type_.check_constraints(data)
  File "/home/erik/workspace/asn1tools/asn1tools/codecs/compiler.py", line 94, in check_constraints
    return self.constraints_checker.encode(data)
  File "/home/erik/workspace/asn1tools/asn1tools/codecs/constraints_checker.py", line 342, in encode
    self._type.encode(data)
  File "/home/erik/workspace/asn1tools/asn1tools/codecs/constraints_checker.py", line 247, in encode
    length))
asn1tools.codecs.ConstraintsError: Expected a list of between 1 and 10 elements, but got 0.
>>>