[Python-apps-team] Bug#851417: khal: FTBFS randomly (AssertionError)

[Santiago Vila]

Package: src:khal
Version: 0.8.4-2
Severity: important

Dear maintainer:

I tried to build this package in stretch with "dpkg-buildpackage -A"
but it failed:

--------------------------------------------------------------------------------
[...]
 debian/rules build-indep
dh build-indep --with python3,sphinxdoc --buildsystem=pybuild
   dh_testdir -i -O--buildsystem=pybuild
   dh_update_autotools_config -i -O--buildsystem=pybuild
   dh_auto_configure -i -O--buildsystem=pybuild
I: pybuild base:184: python3.5 setup.py config 
running config
   debian/rules override_dh_auto_build
make[1]: Entering directory '/<<PKGBUILDDIR>>'
dh_auto_build
I: pybuild base:184: /usr/bin/python3 setup.py build 
running build
running build_py
creating /<<PKGBUILDDIR>>/.pybuild/pythonX.Y_3.5/build/khal

[... snipped ...]

        SUMMARY:second meeting
        END:VEVENT
        """), cal1))
    
        sleep(0.01)
        coll.update_db()
        sleep(0.01)
        assert not coll._needs_update(cal1)
    
        old_update_vevent = coll._update_vevent
        updated_hrefs = []
    
        def _update_vevent(href, calendar):
            updated_hrefs.append(href)
            return old_update_vevent(href, calendar)
        monkeypatch.setattr(coll, '_update_vevent', _update_vevent)
    
        href_three, etag_three = vdirs[cal1].upload(coll.new_event(dedent("""
        BEGIN:VEVENT
        UID:meeting-three
        DTSTART;VALUE=DATE:20140911
        DTEND;VALUE=DATE:20140912
        SUMMARY:third meeting
        END:VEVENT
        """), cal1))
        sleep(0.01)
    
        assert coll._needs_update(cal1)
        coll.update_db()
        sleep(0.01)
>       assert updated_hrefs == [href_three]
E       assert ['meeting-thr...ting-two.ics'] == ['meeting-three.ics']
E         Left contains more items, first extra item: 'meeting-one.ics'
E         Use -v to get the full diff

tests/khalendar_test.py:392: AssertionError
==== 1 failed, 168 passed, 7 skipped, 1 xfailed, 1 xpassed in 2.64 seconds =====
E: pybuild pybuild:276: test: plugin distutils failed with: exit code=1: cd /<<PKGBUILDDIR>>/.pybuild/pythonX.Y_3.5/build; python3.5 -m pytest tests
dh_auto_test: pybuild --test --test-pytest -i python{version} -p 3.5 returned exit code 13
debian/rules:26: recipe for target 'override_dh_auto_test' failed
make[1]: *** [override_dh_auto_test] Error 25
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
debian/rules:6: recipe for target 'build-indep' failed
make: *** [build-indep] Error 2
dpkg-buildpackage: error: debian/rules build-indep gave error exit status 2
--------------------------------------------------------------------------------

This is just how the build ends, not necessarily the relevant part.

I've put several build logs here:

https://people.debian.org/~sanvila/build-logs/khal/

If this is really a bug in one of the build-depends, please use reassign and affects,
so that this is still visible in the page for this package.

The bug should be reproducible with sbuild on a single CPU virtual machine,
provided you try enough times (as the failure happens randomly).

Thanks.