[regression] multipass aliases command throws segmentation fault

[minhio]

Describe the bug multipass aliases command throws segmentation fault after launching the docker blueprint, if and only if there are no other aliases defined.

To Reproduce Given there are no aliases defined and multipass aliases should yield No aliases defined.

1. launch an instance of the docker blueprint with multipass launch docker
2. execute multipass aliases, segmentation fault happens here
3. create an alias with multipass alias docker:hello
4. execute multipass aliases, back to normal, no errors here

Expected behavior multipass aliases should return list of aliases without error

Additional info

• OS: macOS 14.2.1
• multipass version
  • multipass 1.13.0+mac
  • multipassd 1.13.0+mac
• multipass info --all
  • Name: docker State: Running Snapshots: 0 IPv4: 192.168.101.24 172.17.0.1 Release: Ubuntu 22.04.3 LTS Image hash: f885a8e8f62a (Ubuntu 22.04 LTS) CPU(s): 2 Load: 0.97 0.46 0.17 Disk usage: 2.5GiB out of 38.7GiB Memory usage: 254.7MiB out of 3.8GiB Mounts: /Users/minh/multipass/docker => docker UID map: 501:default GID map: 20:default
• multipass get local.driver
  • qemu

[andrei-toterman]

Hey, @minhio! Indeed, I can reproduce this. And it doesn't seem to happen in 1.12.2. We'll come up with a fix as soon as possible. Thanks for reporting this!