keepassxc: dbus: D-Bus library appears to be incorrectly set up

[Beneter]

Description

It seems that there is a regression in keepassxc.profile. After updating from firejail to firejail-git in Arch I receive the following error:
D-Bus library appears to be incorrectly set up: see the manual page for dbus-uuidgen to correct this issue. (Failed to open "/var/lib/dbus/machine-id": [...] Failed to open "/etc/machine-id": [...])

Potential Fix

When adding private-etc machine-id to keepassxc.local it is working fine. This was already fixed in #1637.
I am not providing a PR, as I am unaware if this fix should be applied at some common level instead.

Environment

• Arch Linux
• Firejail version 0.9.72.r9566.bf8229dde
• Commit: ec657007b0b347afb48715c6ddfff3174431232a
• Wayland
• ZFS

Checklist

• The issues is caused by firejail (i.e. running the program by path (e.g. /usr/bin/vlc) "fixes" it).
• I can reproduce the issue without custom modifications (e.g. globals.local). Did not try
• The program has a profile. (If not, request one in https://github.com/netblue30/firejail/issues/1139)
• The profile (and redirect profile if exists) hasn't already been fixed upstream.
• I have performed a short search for similar issues (to avoid opening a duplicate).
  • I'm aware of browser-allow-drm yes/browser-disable-u2f no in firejail.config to allow DRM/U2F in browsers.
• I used --profile=PROFILENAME to set the right profile. (Only relevant for AppImages)

Log

Output of firejail /path/to/program

Reading profile /etc/firejail/keepassxc.profile
Reading profile /etc/firejail/keepassxc.local
Reading profile /etc/firejail/whitelist-common.inc
Reading profile /etc/firejail/whitelist-common.inc
Reading profile /etc/firejail/globals.local
Reading profile /etc/firejail/disable-common.inc
Reading profile /etc/firejail/disable-devel.inc
Reading profile /etc/firejail/disable-exec.inc
Reading profile /etc/firejail/disable-interpreters.inc
Reading profile /etc/firejail/disable-programs.inc
Reading profile /etc/firejail/disable-shell.inc
Reading profile /etc/firejail/disable-xdg.inc
Reading profile /etc/firejail/whitelist-run-common.inc
Reading profile /etc/firejail/whitelist-usr-share-common.inc
Reading profile /etc/firejail/whitelist-var-common.inc
Reading profile /etc/firejail/whitelist-var-common.local
firejail version 0.9.73

Seccomp list in: !name_to_handle_at, check list: @default-keep, prelist: unknown,
Parent pid 850221, child pid 850225
3 programs installed in 48.96 ms
Private /etc installed in 12.62 ms
Warning: /sbin directory link was not blacklisted
Warning: /usr/sbin directory link was not blacklisted
Warning: not remounting /run/user/1000/doc
Seccomp list in: !name_to_handle_at, check list: @default-keep, prelist: unknown,
Child process initialized in 300.34 ms
QSocketNotifier: Can only be used with threads started with QThread
dbus[21]: D-Bus library appears to be incorrectly set up: see the manual page for dbus-uuidgen to correct this issue. (Failed to open "/var/lib/dbus/machine-id": Datei oder Verzeichnis nicht gefunden; Failed to open "/etc/machine-id": Datei oder Verzeichnis nicht gefunden)
  D-Bus not built with -rdynamic so unable to print a backtrace

Parent is shutting down, bye...

[rusty-snake]

Known bug with QT DBus library. Was reintroduced with 5d0822c. Better fix with etc groups would be private-etc @x11.

[rusty-snake]

5d0822c changed more profiles from private-etc ...,machine-id,... to a line that does not include x11. Even if the profile sets nosound.