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PR which suppose to solve problem : https://github.com/os-autoinst/os-autoinst-distri-opensuse/pull/4757.

But currently it still failing , so need further investigations :

http://kimball.arch.suse.de/tests/1021#step/basic/15

Trying to summarize why this problem appeared all of a sudden and some specialties observed.

The command used by the test is/was:
for dev in /sys/class/net/!(lo); do ...; done

Now, '!' is the character for history expansion. History expansion is automatically disabled in some cases inside a command. According to the bash man page:

Several characters inhibit history expansion if found immediately following the history expansion cheven if it
is unquoted: space, tab, newline, carriage return, and =. If the extglob shell option is enabled, ( will also inhibit
expansion.

so, !( (from !(lo) ) is treated differently if extglob is enabled or disabled.

As for the reason why extglob status changed:

systemd had previously recommended systemd-bash-completion, which in turn required bash-completion. AS this was only one split out, and the same was not done for other shell-completions, the package was merged back into the main systemd package. As this is not explicitly bound to a shell in use, it does neither recommend not require bash-completion (which makes sense).

This, in turn," resulted in bash-completion no longer being auto-installed on a system (I submitted a pattern change to explicitly enable it on regular systems, as users of bash certainly profit from it)

bash-completion itself enables shopt extglob, which is how this all ever worked to start with. Merely a lot of luck

Issue fixed by moving everything into sh script https://github.com/os-autoinst/os-autoinst-distri-opensuse/pull/4757