[Python-apps-team] Bug#976702: vdirsyncer: crashes with runtime error

[Mart Lubbers]

Package: vdirsyncer
Version: 0.16.7-2
Severity: grave
Justification: renders package unusable

Dear Maintainer,

After the update, vdirsyncer crashes during syncing with the following error:

> error: Unknown error occured for calendar/calendar: 'xml.etree.ElementTree.Element' object has no attribute 'getiterator'

I assume an older xml etree interface was used that broke when updating the
python version to 3.9.

Related upstream issue: https://github.com/pimutils/vdirsyncer/issues/854

-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.9.0-4-amd64 (SMP w/8 CPU threads)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages vdirsyncer depends on:
ii  python3                    3.9.0-4
ii  python3-atomicwrites       1.4.0-1
ii  python3-click              7.1.2-1
ii  python3-click-log          0.2.1-2
ii  python3-click-threading    0.4.4-2
ii  python3-requests           2.24.0+dfsg-1
ii  python3-requests-toolbelt  0.8.0-1.1

vdirsyncer recommends no packages.

Versions of packages vdirsyncer suggests:
pn  python3-requests-oauthlib  <none>
pn  vdirsyncer-doc             <none>

-- no debconf information