RuntimeError: generator raised StopIteration in python 3.7 in unit test

[Thomas Goirand]

Hi,

When building Murano Rocky RC1 in Debian Sid, the below unit test fails. This is specific to Python 3.7, which is available in both Ubuntu and Debian.

======================================================================
FAIL: murano.tests.unit.dsl.test_helpers.TestDSLHelpers.test_walk_gc_with_towards_true
murano.tests.unit.dsl.test_helpers.TestDSLHelpers.test_walk_gc_with_towards_true
----------------------------------------------------------------------
_StringException: Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/murano/dsl/helpers.py", line 741, in walk_gc
    [(t, trace + [item]) for t in gc.get_referrers(item)]
  File "/usr/lib/python3/dist-packages/mock/mock.py", line 1062, in __call__
    return _mock_self._mock_call(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/mock/mock.py", line 1121, in _mock_call
    result = next(effect)
StopIteration

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/mock/mock.py", line 1305, in patched
    return func(*args, **keywargs)
  File "/<<PKGBUILDDIR>>/murano/tests/unit/dsl/test_helpers.py", line 313, in test_walk_gc_with_towards_true
    for obj in helpers.walk_gc(first_obj, True, handler):
RuntimeError: generator raised StopIteration

[zhurong (zhu-rong)]

murano master branch fixed this bug in: https://review.openstack.org/#/c/637346/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/639244
Committed: https://git.openstack.org/cgit/openstack/murano/commit/?id=69b6bf358693e44f20fd5f8f7d07fdabaa2cc647
Submitter: Zuul
Branch: stable/rocky

commit 69b6bf358693e44f20fd5f8f7d07fdabaa2cc647
Author: zhurong <email address hidden>
Date: Sat Feb 16 10:32:00 2019 +0800

    Fix py37 unit test error

    Closes-bug: #1789239
    Change-Id: If252c58546a60630dff9427acb9a6ff2cc8244ca
    (cherry picked from commit 9f4287ccc3f3ac467f56dc8bd12d3a35f03867c1)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/murano rocky-eol release.