Unhandled error on VM creation

[eliasp]

When creating a new VM fails (in this case due to an invalid memory specification), the error isn't properly handled and samutev attempts to continue:

$ samutev.sh -s 'master:c1:m0.5:d3 minion:c1:m0.5:d3'
launching master (master with cpu=1 mem=0.5G disk=3G and image 'focal')
launch failed: Invalid arguments supplied
Invalid memory size value supplied: 0.5G.
exec failed: instance "master" does not exist
exec failed: instance "master" does not exist
mount failed: The following errors occurred:
instance "master" does not exist
mount failed: The following errors occurred:
instance "master" does not exist
exec failed: instance "master" does not exist
mount failed: The following errors occurred:
instance "master" does not exist
exec failed: instance "master" does not exist
mount failed: The following errors occurred:
instance "master" does not exist
exec failed: instance "master" does not exist

info failed: The following errors occurred:
instance "master" does not exist
launched  master in 0 minutes and 0 seconds.


info failed: The following errors occurred:
instance "master" does not exist
launching minion (minion with cpu=1 mem=0.5G disk=3G and image 'focal')
launch failed: Invalid arguments supplied
Invalid memory size value supplied: 0.5G.
info failed: The following errors occurred:
instance "minion" does not exist
launched  minion in 0 minutes and 0 seconds.


ssh: Could not resolve hostname : Name or service not known

alltogether: 00:00 min.

READY to go:
    ssh root@
    salt '*' test.ping

This is most likely due to multipass being launched unconditionally in line 271:

multipass launch --cpus "${CPU}" --disk "${DISK}"G --mem "${MEM}"G --name "${VM}" --cloud-init tmp_cloudinit.$$ "${IMAGE}";

This could be prevented by chaining the abort handling to it using &&.