ubuntu-image command crash on 22.04 Jammy LxD VM

[lo]

1. Using stable channel of ubuntu-image (1.11+snap1):
DEBUG:ubuntu-image:-> [11] populate_filesystems
ERROR:ubuntu-image:COMMAND FAILED: sudo mount -oloop work/volumes/pc/part3.img /tmp/tmp81dyopik/root-mount
ERROR:ubuntu-image:
ERROR:ubuntu-image:sudo: account validation failure, is your account locked?
sudo: a password is required

2. When switch to use edge channel (2.1+snap7), there is no previous error but another:
[10] populate_prepare_partitions
Error: Error running mkfs with content: exec: "mkfs.vfat": executable file not found in $PATH

[Reproduction steps]
lxc launch images:ubuntu/jammy/cloud iot-jammy-test --vm
lxc exec iot-jammy-test bash

su - ubuntu
mkdir work
cd work

# Install packages required for building image.
sudo apt-get install snapd wget git snapcraft
sudo snap install ubuntu-image --classic

# Build gadget
git clone -b classic https://github.com/snapcore/pc-amd64-gadget.git
cd pc-amd64-gadget
make
cd -

# Download base image
wget -O rootfs.tar.xz https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64-root.tar.xz
mkdir cloud-image
cd cloud-image
sudo tar Jxf ../rootfs.tar.xz
cd -

# Build image
$ sudo /snap/bin/ubuntu-image classic -d -O out -w work -f cloud-image -a arm64 /home/ubuntu/work/pc-amd64-gadget/install

---
https://forum.snapcraft.io/t/ubuntu-image-command-crashed/23249/42

[ethan.hsieh (ethan.hsieh)]

Cannot reproduce the issue on 20.04 Focal LxD VM.

ubuntu-image: 1.11+snap1

Here is the log:
DEBUG:ubuntu-image:-> [ 0] make_temporary_directories
DEBUG:ubuntu-image:-> [ 1] prepare_gadget_tree
DEBUG:ubuntu-image:-> [ 2] prepare_image
DEBUG:ubuntu-image:-> [ 3] load_gadget_yaml
DEBUG:ubuntu-image:-> [ 4] populate_rootfs_contents
DEBUG:ubuntu-image:-> [ 5] populate_rootfs_contents_hooks
...
DEBUG:ubuntu-image:-> [ 6] generate_disk_info
DEBUG:ubuntu-image:-> [ 7] calculate_rootfs_size
DEBUG:ubuntu-image:-> [ 8] pre_populate_bootfs_contents
DEBUG:ubuntu-image:-> [ 9] populate_bootfs_contents
DEBUG:ubuntu-image:No bootloader bits prepared in the rootfs - skipping boot copies.
DEBUG:ubuntu-image:-> [10] prepare_filesystems
DEBUG:ubuntu-image:-> [11] populate_filesystems
DEBUG:ubuntu-image:-> [12] make_disk
DEBUG:ubuntu-image:-> [13] generate_manifests
DEBUG:ubuntu-image:-> [14] finish
DEBUG:ubuntu-image:-> [15] close

[William Wilson (jawn-smith)]

A new snap has been released to the edge channel. Can you test with that snap? I expect it will resolve this issue.

[ethan.hsieh (ethan.hsieh)]

@William

The issue is gone after I upgrade ubuntu-image to 2.2+snap8.

$ sudo snap refresh ubuntu-image --edge
ubuntu-image (edge) 2.2+snap8 from Canonical✓ refreshed
$ sudo /snap/bin/ubuntu-image classic -d -O out -w work -f cloud-image -a arm64 /home/ubuntu/work/pc-amd64-gadget/install
[0] make_temporary_directories
[1] prepare_gadget_tree
[2] run_live_build
[3] load_gadget_yaml
WARNING: volumes:pc:structure:2:filesystem_label used for defining partition roles; use role instead
[4] populate_rootfs_contents
[5] populate_rootfs_contents_hooks
[6] prepare_classic_image
[7] generate_disk_info
[8] calculate_rootfs_size
[9] populate_bootfs_contents
[10] populate_prepare_partitions
[11] make_disk
[12] generate_manifest
[13] finish