I just reproduced this bug on an upgrade from cosmic to disco. Apparently sasl2-bin is using a new option to invoke-rc.d which is not supported in the cosmic version of init-system-helpers, but does not have an appropriate versioned dependency on whichever version introduces this new flag.
This is reproducible with the stock Ubuntu packages and the original report of 'third-party-packages' is a false positive.
I just reproduced this bug on an upgrade from cosmic to disco. Apparently sasl2-bin is using a new option to invoke-rc.d which is not supported in the cosmic version of init-system- helpers, but does not have an appropriate versioned dependency on whichever version introduces this new flag.
This is reproducible with the stock Ubuntu packages and the original report of 'third- party-packages' is a false positive.