Created attachment 1572162 [details]
build.log from Koji

See https://koji.fedoraproject.org/koji/taskinfo?taskID=35001283

======================================================================
ERROR: test_changelog (tests.test_changelog.ChangelogTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/compose-utils-0.1.27/tests/test_changelog.py", line 92, in test_changelog
    data = changelog.get_changelog(old_compose, new_compose)
  File "/builddir/build/BUILD/compose-utils-0.1.27/compose_utils/changelog.py", line 294, in get_changelog
    srpm_headers_old = self.read_srpm_headers(srpms_old)
  File "/builddir/build/BUILD/compose-utils-0.1.27/compose_utils/changelog.py", line 194, in read_srpm_headers
    pool.stop()
  File "/usr/lib/python3.7/site-packages/kobo/threads.py", line 120, in stop
    six.reraise(exc_info[0], exc_info[1], exc_info[2])
  File "/usr/lib/python3.7/site-packages/six.py", line 693, in reraise
    raise value
  File "/usr/lib/python3.7/site-packages/kobo/threads.py", line 67, in run
    self.process(item, num)
  File "/builddir/build/BUILD/compose-utils-0.1.27/compose_utils/changelog.py", line 89, in process
    rpm_obj = self.pool.file_cache.add(file_path)
  File "/usr/lib/python3.7/site-packages/kobo/pkgset.py", line 257, in add
    value = file_wrapper_class(file_path, stat=st, **kwargs)
  File "/builddir/build/BUILD/compose-utils-0.1.27/compose_utils/changelog.py", line 60, in __init__
    super(SimpleRpmWrapperWithChangelog, self).__init__(file_path, **kwargs)
  File "/usr/lib/python3.7/site-packages/kobo/pkgset.py", line 179, in __init__
    self.name = kobo.rpmlib.get_header_field(header, "name").decode('utf-8')
AttributeError: 'str' object has no attribute 'decode'
======================================================================
ERROR: test_changelog_with_modular_suffix (tests.test_changelog.ChangelogTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/builddir/build/BUILD/compose-utils-0.1.27/tests/test_changelog.py", line 179, in test_changelog_with_modular_suffix
    data = changelog.get_changelog(old_compose, new_compose)
  File "/builddir/build/BUILD/compose-utils-0.1.27/compose_utils/changelog.py", line 294, in get_changelog
    srpm_headers_old = self.read_srpm_headers(srpms_old)
  File "/builddir/build/BUILD/compose-utils-0.1.27/compose_utils/changelog.py", line 194, in read_srpm_headers
    pool.stop()
  File "/usr/lib/python3.7/site-packages/kobo/threads.py", line 120, in stop
    six.reraise(exc_info[0], exc_info[1], exc_info[2])
  File "/usr/lib/python3.7/site-packages/six.py", line 693, in reraise
    raise value
  File "/usr/lib/python3.7/site-packages/kobo/threads.py", line 67, in run
    self.process(item, num)
  File "/builddir/build/BUILD/compose-utils-0.1.27/compose_utils/changelog.py", line 89, in process
    rpm_obj = self.pool.file_cache.add(file_path)
  File "/usr/lib/python3.7/site-packages/kobo/pkgset.py", line 257, in add
    value = file_wrapper_class(file_path, stat=st, **kwargs)
  File "/builddir/build/BUILD/compose-utils-0.1.27/compose_utils/changelog.py", line 60, in __init__
    super(SimpleRpmWrapperWithChangelog, self).__init__(file_path, **kwargs)
  File "/usr/lib/python3.7/site-packages/kobo/pkgset.py", line 179, in __init__
    self.name = kobo.rpmlib.get_header_field(header, "name").decode('utf-8')
AttributeError: 'str' object has no attribute 'decode'
----------------------------------------------------------------------
Ran 99 tests in 2.736s
FAILED (errors=2)

Full logs attached.

The failure looks very much like bz1693751.

This blocks the Python 3.8 rebuild but also happens with Python 3.7.