Creating the rootfs image fails sometimes

Created by: ollieparanoid

The following error just happened during pmbootstrap install: losetup: /home/user/rootfs/lg-mako.img: failed to set up loop device: No such file or directory

When I run pmbootstrap install again, it gets created fine. This might be a regression in using truncate instead of fallocate? Or maybe it is related to the loop module not getting loaded properly?

I rand lsmod | grep loop directly after the failed pmbootstrap install and the loop module was loaded.

Full log:

(029356) [23:47:15] (native) % rm /home/user/rootfs/lg-mako.img
(029356) [23:47:15] (native) create lg-mako.img (435M)
(029356) [23:47:15] WARNING: Make sure, that your target device's partition table has allocated at least 435M as system partition!
[23:47:15] Continue? (y/n) [y] y
(029356) [23:47:18] (native) % su user -c 'mkdir -p /home/user/rootfs'
(029356) [23:47:18] (native) % truncate -s 435M /home/user/rootfs/lg-mako.img
(029356) [23:47:18] (native) mount /dev/install (lg-mako.img)
(029356) [23:47:18] (native) mount /home/user/rootfs/lg-mako.img (loop)
(029356) [23:47:18] % sudo mount --bind /dev/loop-control /home/user/.local/var/pmbootstrap/chroot_native//dev/loop-control
(029356) [23:47:18] (native) % losetup -f /home/user/rootfs/lg-mako.img
losetup: /home/user/rootfs/lg-mako.img: failed to set up loop device: No such file or directory
(029356) [23:47:19] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(029356) [23:47:19] NOTE: The failed command's output is above the ^^^ line in the logfile: /home/user/.local/var/pmbootstrap/log.txt
(029356) [23:47:19] ERROR: Command failed: (native) % losetup -f /home/user/rootfs/lg-mako.img
(029356) [23:47:19] Run 'pmbootstrap log' for details.
(029356) [23:47:19] See also: <https://postmarketos.org/troubleshooting>
(029356) [23:47:19] Traceback (most recent call last):
  File "/home/user/code/pmbootstrap/pmb/helpers/run.py", line 45, in core
    stderr=args.logfd)
  File "/usr/lib/python3.6/subprocess.py", line 291, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['sudo', '/usr/bin/sh', '-c', "env -i CHARSET=UTF-8 PATH=/usr/lib/ccache/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sb
in:/bin SHELL=/bin/ash HISTFILE=~/.ash_history /usr/bin/chroot /home/user/.local/var/pmbootstrap/chroot_native sh -c 'cd /;losetup -f /home/user/rootfs/lg-mako.img'"]
' returned non-zero exit status 1.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/user/code/pmbootstrap/pmbootstrap.py", line 53, in main
    getattr(pmb.helpers.frontend, args.action)(args)
  File "/home/user/code/pmbootstrap/pmb/helpers/frontend.py", line 136, in install
    pmb.install.install(args)
  File "/home/user/code/pmbootstrap/pmb/install/install.py", line 285, in install
    install_system_image(args)
  File "/home/user/code/pmbootstrap/pmb/install/install.py", line 164, in install_system_image
    pmb.install.blockdevice.create(args, size_image)
  File "/home/user/code/pmbootstrap/pmb/install/blockdevice.py", line 101, in create
    create_and_mount_image(args, size)
  File "/home/user/code/pmbootstrap/pmb/install/blockdevice.py", line 84, in create_and_mount_image
    pmb.install.losetup.mount(args, img_path)
  File "/home/user/code/pmbootstrap/pmb/install/losetup.py", line 44, in mount
    pmb.chroot.root(args, ["losetup", "-f", img_path])
  File "/home/user/code/pmbootstrap/pmb/chroot/root.py", line 86, in root
    return_stdout, check)
  File "/home/user/code/pmbootstrap/pmb/helpers/run.py", line 58, in core
    raise RuntimeError("Command failed: " + log_message) from exc
RuntimeError: Command failed: (native) % losetup -f /home/user/rootfs/lg-mako.img