Smart rejects upgrade specific package

[niamster]

# smart query packagegroup-apps
...
packagegroup-apps-1.0-r1.24.4@all
packagegroup-apps-1.0-r1.35.6.0@all

# smart query packagegroup-apps --installed
...
packagegroup-apps-1.0-r1.24.4@all

# smart upgrade
...
No interesting upgrades available.

The problem is that smart is rejecting the changeset by weight.
For a given changeset the calculated weight is 1.99, while empty changeset has weight 0.

Changeset

{packagegroup-apps-1.0-r1.35.6.0@all: INSTALL, kb-events-1.0-r2.4@cortexa7hf_neon_vfpv4: INSTALL, python3-msgpack-0.4.7-r0@cortexa7hf_neon_vfpv4: INSTALL, logrotate-3.9.1-r0.1@cortexa7hf_neon_vfpv4: INSTALL, hfsprogs-332.25-r0.0@cortexa7hf_neon_vfpv4: INSTALL, python-flask-0.10.1-r0@cortexa7hf_neon_vfpv4: INSTALL, python-fasteners-0.14.1-r0.0@cortexa7hf_neon_vfpv4: INSTALL, logrotate-cfg-1.0-r4@cortexa7hf_neon_vfpv4: INSTALL, python-markupsafe-0.23-r0@cortexa7hf_neon_vfpv4: INSTALL, python-gevent-1.2.1-r0.0@cortexa7hf_neon_vfpv4: INSTALL, python-werkzeug-0.11.5-r0@cortexa7hf_neon_vfpv4: INSTALL, python-itsdangerous-0.24-r0@cortexa7hf_neon_vfpv4: INSTALL, uwsgi-2.0.14-r1.0@cortexa7hf_neon_vfpv4: INSTALL, python-chacha-1+git81ee4df1020e64a93abe5fbea6b9c9dd8dc3e934-0.0@cortexa7hf_neon_vfpv4: INSTALL, python-greenlet-0.4.12-r0.0@cortexa7hf_neon_vfpv4: INSTALL, glibc-binary-localedata-en-us-2.23-r0@cortexa7hf_neon_vfpv4: INSTALL, python-pycparser-2.14-r0@cortexa7hf_neon_vfpv4: INSTALL, python-monotonic-1.0-r0@cortexa7hf_neon_vfpv4: INSTALL, python-jinja2-2.8-r0@cortexa7hf_neon_vfpv4: INSTALL, python-six-1.10.0-r0@cortexa7hf_neon_vfpv4: INSTALL, led-blink-ext-1.0-r3@cortexa7hf_neon_vfpv4: INSTALL, vlog-fix-1.0-r3@cortexa7hf_neon_vfpv4: INSTALL, share-1.0+gitrzzz-r6.2@cortexa7hf_neon_vfpv4: INSTALL, lastlog-kpanic-1.0-r3@cortexa7hf_neon_vfpv4: INSTALL, python3-pyzmq-16.0.2-r0@cortexa7hf_neon_vfpv4: INSTALL, libexpat1-2.1.0-r0@cortexa7hf_neon_vfpv4: INSTALL, libbsd0-0.8.2-r0@cortexa7hf_neon_vfpv4: INSTALL, nginx-1.8.1-r1.0@cortexa7hf_neon_vfpv4: INSTALL, root-env-cfg-1.0-r1@cortexa7hf_neon_vfpv4: INSTALL, monit-5.20.0-r3.0@cortexa7hf_neon_vfpv4: INSTALL, python-natsort-5.0.2-r0.0@cortexa7hf_neon_vfpv4: INSTALL, zip-3.0-r2@cortexa7hf_neon_vfpv4: INSTALL, python-cffi-1.5.2-r0@cortexa7hf_neon_vfpv4: INSTALL, locale-base-en-us-2.23-r0@cortexa7hf_neon_vfpv4: INSTALL, packagegroup-apps-1.0-r1.24.4@all: REMOVE}

The fix below did the trick but I'm not 100% confident it's the most correct way to fix the issue:

diff --git a/smart/transaction.py b/smart/transaction.py
index 4b90cb7..d7d8526 100644
--- a/smart/transaction.py
+++ b/smart/transaction.py
@@ -1014,7 +1014,7 @@ class Transaction(object):
             else:
                 lockedstate[pkg] = lk
                 csweight = getweight(cs)
-                if csweight < weight:
+                if csweight < weight or len(changeset) == 0:
                     weight = csweight
                     changeset.setState(cs)

[lucagiove]

The two version of the package were available in the channels?
Might be related to this: #11

[niamster]

@lucagiove no, there was only one version in the channel.

[lucagiove]

Ok, so it seems a different issue to #11
I guess epoch was the same on both version of the packages.

[niamster]

Yes, the epoch was the same.