Comment 0 for bug 1970594

I'm reporting this issue from stock Ubuntu, but the problem is observed only in Kubuntu (can be reliably reproduced in a Kubuntu 22.04 VM). The version of xdg-utils is identical.

This problem was initially reported on the snapcraft forum: https://forum.snapcraft.io/t/firefox-wont-set-as-my-default-browser/29708.

    $ xdg-settings check default-web-browser firefox_firefox.desktop
    /usr/bin/xdg-settings: 734: Bad substitution

The offending line is:

    if [ x"!" == x"${browser:0:1}" ]; then

If I modify /usr/bin/xdg-settings in place to set the interpreter to /bin/bash on the first line of the script, the problem goes away.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: xdg-utils 1.1.3-4.1ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
Uname: Linux 5.15.0-27-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Wed Apr 27 11:21:31 2022
InstallationDate: Installed on 2020-09-16 (587 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Alpha amd64 (20200910)
PackageArchitecture: all
SourcePackage: xdg-utils
UpgradeStatus: Upgraded to jammy on 2022-03-19 (38 days ago)