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`adduser` does work as expected, but what are these error messages?

    $ sudo adduser foo
    Adding user `foo' ...
    Adding new group `foo' (1002) ...
    posix_spawn() error=1073741826
    posix_spawn() error=1073741826
    posix_spawn() error=1073741826
    Adding new user `foo' (1002) with group `foo' ...
    posix_spawn() error=1073741826
    posix_spawn() error=1073741826
    posix_spawn() error=1073741826
    posix_spawn() error=1073741826
    Creating home directory `/home/foo' ...
    Copying files from `/etc/skel' ...
    [...]