Build failure of network:osmocom:nightly/osmo-smlc in Debian_11/i586

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Package network:osmocom:nightly/osmo-smlc failed to build in Debian_11/i586

Check out the package for editing: osc checkout network:osmocom:nightly osmo-smlc

Last lines of build log: /var/cache/obs/worker/root_1/.pkgs/libstdc++6.deb: Input/output error (worker was cloud104:1)