Describe the bug
I manage multipass vms via bash scripts, providing cloud-init configuration files via process substitution (<(command)). Since multipass v1.2.0 multipass is not managing correctly this kind of inter-process communication providing error: No such file: /dev/fd/63 running command multipass launch. Please find hereunder the difference between v1.1.0 and v.1.2.0 (and v1.2.1

Using the following YAML should output warnings per offending spec instead of ignoring them silently.
Example:

footloose create
WARN[0000] Options under "spec.ignite" for "manager-%d" are ignored when using the "docker" backend
WARN[0000] Options under "spec.ignite" for "worker-%d" are ignored when using the "docker" backend
INFO[0000] Docker Image: quay.io/footloose/ubuntu18.04 prese

Some old programs versions can be found here if someone needs them to test old exploits for instance.

I'm trying to use ethereumjs-blockchain to read the raw levedb data created by geth, but I failed to do so.
And I also try to use the dbManager to read the levedb data, failed again. My steps are:

1. sync some the blockchain data by using geth --goerli --datadir <my data dir>
2. write code to read the level db data.

const level = require('level');
const DbManager = requ