[Pkg-matrix-maintainers] Bug#1128421: fails to start: Synapse 1.146.0 needs cffi, but it is not installed

[Jonas Smedegaard]

Package: matrix-synapse
Version: 1.146.0-1
Severity: serious

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After upgrade to 1.146.0, my instance of synapse failed to start.
Rebooting and letting it sit for a while, then checking back, it had
emitted the following to the log:

feb 19 17:21:42 xayide python3[91251]: Synapse 1.146.0 needs cffi, but it is not installed
feb 19 17:21:42 xayide python3[91251]: Missing Requirements: cffi
feb 19 17:21:42 xayide python3[91251]: To install run:
feb 19 17:21:42 xayide python3[91251]:     sudo apt install python3-cffi

After installing python3-cffi, the service started.

Raising severity to serious, as I believe it to be a Policy violation
to miss declaring a dependency needed for core operation.

 - Jonas

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