[Pkg-matrix-maintainers] Bug#1021435: python3-matrix-common: matrix-synapse not starting due to ModuleNotFoundError: No module named 'matrix_common'

[Sahil Dhiman]

Package: python3-matrix-common
Version: 1.3.0-2~bpo11+1
Severity: important
X-Debbugs-Cc: sahil at sahilister.in

Dear Maintainer,

   * What led up to the situation?
     Was updating matrix-synapse from 1.63.0-1~bpo11+1 to v1.66.0-1~bpo11+1 when python3-matrix-common was also updated to 1.3.0-2~bpo11+1. 
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
     From `journalctl -u matrix-synapse`, it shows ModuleNotFoundError: No module named 'matrix_common'. Full log can be found here https://paste.debian.net/1256360/
   * What was the outcome of this action?
     matrix-synapse package is stuck in activating state. 
   * What outcome did you expect instead?
     matrix-synapse package is not starting. 

-- System Information:
Debian Release: 11.5
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-9-amd64 (SMP w/12 CPU threads)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-matrix-common depends on:
ii  python3                     3.9.2-3
ii  python3-attr                20.3.0-1
ii  python3-importlib-metadata  1.6.0-2

python3-matrix-common recommends no packages.

python3-matrix-common suggests no packages.

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