removing snapd causes "crash" (report)

[Walter]

Hi!

I just did this on my pristine fresh Jammy install:

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# apt-get remove --purge snapd
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:
  snapd*
0 upgraded, 0 newly installed, 1 to remove and 3 not upgraded.
After this operation, 102 MB disk space will be freed.
Do you want to continue? [Y/n]
(Reading database ... 179270 files and directories currently installed.)
Removing snapd (2.58+22.04) ...
Warning: Stopping snapd.service, but it can still be activated by:
  snapd.socket
dpkg: warning: while removing snapd, unable to remove directory '/var/snap': Device or resource busy - directory may be a mount point?
Processing triggers for gnome-menus (3.36.0-1ubuntu3) ...
Processing triggers for man-db (2.10.2-1) ...
Processing triggers for dbus (1.12.20-2ubuntu4.1) ...
Processing triggers for mailcap (3.70+nmu1ubuntu1) ...
Processing triggers for desktop-file-utils (0.26-1ubuntu3) ...
(Reading database ... 179177 files and directories currently installed.)
Purging configuration files for snapd (2.58+22.04) ...
Stopping snap-bare-5.mount
Stopping unit snap-bare-5.mount
Waiting until unit snap-bare-5.mount is stopped [attempt 1]
snap-bare-5.mount is stopped.
Removing snap bare and revision 5
Removing snap-bare-5.mount
Stopping snap-core20-1822.mount
Stopping unit snap-core20-1822.mount
Waiting until unit snap-core20-1822.mount is stopped [attempt 1]
snap-core20-1822.mount is stopped.
Removing snap core20 and revision 1822
Removing snap-core20-1822.mount
Stopping snap-firefox-2356.mount
Stopping unit snap-firefox-2356.mount
Waiting until unit snap-firefox-2356.mount is stopped [attempt 1]
snap-firefox-2356.mount is stopped.
Removing snap firefox and revision 2356
rm: skipping '/var/snap/firefox/common/host-hunspell', since it's on a different device
dpkg: error processing package snapd (--purge):
 installed snapd package post-removal script subprocess returned error exit status 1
Errors were encountered while processing:
 snapd
E: Sub-process /usr/bin/dpkg returned an error code (1)

----

This triggered apport. And now I'm here.

I can work around this.

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# dpkg -l | grep -v ^ii | grep ^[a-z]
ic snapd

# umount $(mount | grep snap | awk '{print $3}')
umount: /var/snap: target is busy.
umount: /snap/snapd/18357: target is busy.
umount: /run/snapd/ns: target is busy.

# umount $(mount | grep snap | awk '{print $3}')
umount: /snap/snapd/18357: target is busy.

# apt-get remove --purge snapd
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:
  snapd*
...
Removing snapd cache
Removing snapd state

----

All good.

Cheers,
Walter

ProblemType: Package
DistroRelease: Ubuntu 22.04
Package: snapd (not installed)
ProcVersionSignature: Ubuntu 5.19.0-38.39~22.04.1-generic 5.19.17
Uname: Linux 5.19.0-38-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82.3
AptOrdering:
 snapd:amd64: Purge
 NULL: ConfigurePending
 NULL: PurgePending
 NULL: ConfigurePending
Architecture: amd64
CasperMD5CheckResult: pass
Date: Sat Apr 8 20:39:43 2023
ErrorMessage: installed snapd package post-removal script subprocess returned error exit status 1
InstallationDate: Installed on 2023-04-08 (0 days ago)
InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223)
Python3Details: /usr/bin/python3.10, Python 3.10.6, python3-minimal, 3.10.6-1~22.04
PythonDetails: /usr/bin/python3.10, Python 3.10.6, python-is-python3, 3.9.2-2
RelatedPackageVersions:
 dpkg 1.21.1ubuntu2.1
 apt 2.4.8
SourcePackage: snapd
Title: package snapd (not installed) failed to install/upgrade: installed snapd package post-removal script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)