gnuchess --addbook doesn't exit anymore

Hello,

In Debian, we build the gnuchess-book package using gnuchess --addbook. It =
now
fails to build [1]=A0because this command doesn't return anymore. This chan=
ge has
been introduced in 6.2.2 (it works fine with 6.2.1).

Would it be possible to revert this change?

Thanks,
Vincent

[1] https://bugs.debian.org/834670