qmlscene not pulling all required dependencies

[Martin Mrazik]

We have the qt5-propper ppa enabled and doing something like this:
sudo apt-get install qmlscene qt5-default qtdeclarative5-qtquick2-plugin

Now with the state of the ppa as of today we are getting:
+ qmlscene /tmp/main.qml
Cannot mix incompatible Qt library (version 0x50001) with this library (version 0x50002)
/tmp/hudson3105480027562072510.sh: line 32: 2959 Aborted (core dumped) qmlscene /tmp/main.qml

Adding libqt5quick5 and libqt5qml5 to the apt-get install seems to fix the problem.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Timo Jyrinki (timo-jyrinki)]

I believe this only happens when you've mixed versions of libraries and do only selected update instead of apt-get upgrade?

But true, probably all dependencies should have a strict version number requirement in this case, since Qt does not allow for example some libraries to be older version like 5.0.0 and some newer like 5.0.1/5.0.2.

[Timo Jyrinki (timo-jyrinki)]

Hmm. If you're making an assumption that raring archives + apt-get install works, that's not anymore the case since there's a newer Qt version. Also before this there have been many patches at the qt5-proper that should be in use instead of using the versions in raring archives, even though the version number didn't see other than a distro version increasing.

So when using the PPA, apt-get dist-upgrade should be done in all cases to be sure you're using the same versions that run on the device.

[Timo Jyrinki (timo-jyrinki)]

(the version dependencies should still be made more strict so that partial upgrade wouldn't be possible, but it doesn't change that the whole PPA contents should be used when testing regardless)

[Timo Jyrinki (timo-jyrinki)]

This should be fixed in the 5.0.2 packages, qmlscene for example depends on >= 5.0.2 for the libqt5core5 etc.