ValueError for missing account_id

[lusitania]

Hi

I was trying to enumerate available Glacier vaults for my account, was following the examples in class Glacier.Account and vaults.all():

import boto3

accountId = '-'  # (1) You can either specify an AWS account ID or optionally a single '-' (hyphen)

glacier = boto3.resource('glacier')
account = glacier.Account(accountId)
vault_iterator = account.vaults.all()

print(list(vault_iterator))

/Src/glacier-archive (master)$ ./test.py 
Traceback (most recent call last):
  File "./test.py", line 19, in <module>
    print(list(allvaults))
  File "/Src/glacier-archive/run/python/lib/python3.4/site-packages/boto3/resources/collection.py", line 82, in __iter__
    for page in self.pages():
  File "/Src/glacier-archive/run/python/lib/python3.4/site-packages/boto3/resources/collection.py", line 167, in pages
    for item in self._handler(self._parent, params, page):
  File "/Src/glacier-archive/run/python/lib/python3.4/site-packages/boto3/resources/response.py", line 240, in __call__
    parent, identifiers, response_item))
  File "/Src/glacier-archive/run/python/lib/python3.4/site-packages/boto3/resources/response.py", line 288, in handle_response_item
    resource = resource_cls(**kwargs)
  File "/Src/glacier-archive/run/python/lib/python3.4/site-packages/boto3/resources/base.py", line 119, in __init__
    'Required parameter {0} not set'.format(identifier))
ValueError: Required parameter account_id not set

I get this error for both my real accountId as well as '-'. However, if I query the vault directly

v101 = glacier.Vault(accountId, vaultname)
print(v101.size_in_bytes)

... I'm getting a proper response. Why? What's wrong?

(1): https://docs.aws.amazon.com/amazonglacier/latest/dev/api-vaults-get.html

[jamesls]

This appears to be a bug in our resources implementation in boto3.