I found a workaround myself.
Our own archive was derived from e.g. boost::archive::text_iarchive_impl.
If I add the following code to its constructor it works again:
if(0 == (flags & boost::archive::archive_flags::no_header))
init();
I found this code in the text_iarchive class, which is derived from
text_iarchive_impl, what looks strange to me.
Is this a bug or should I use another class to derive our own archives from?
Best regards
Kai
> -----Ursprüngliche Nachricht-----
> Von: Boost-users <boost-users-boun...@lists.boost.org> Im Auftrag von Kai
> Benndorf via Boost-users
> Gesendet: Mittwoch, 24. Juni 2020 15:10
> An: boost-users@lists.boost.org
> Cc: Kai Benndorf <kai.bennd...@t-online.de>
> Betreff: [Boost-users] [serialization] Backward compatibility problem with
> 1:73
>
> Hi all,
>
> we are using boost serialization for writing and reading data and just
> switched from boost 1:67 to boost 1:73.
> We now cannot read back the data written with boost 1:67 or prior. We get
> an
> archive_exception::input_stream_error exception.
>
> Examining the files shows the difference. The old files are starting with
>
> 22 serialization::archive 16
>
> The new files are missing this data. Removing it from the files enabled
> the
> reading with boost 1:73.
>
> But strangely, if trying a small example program (the gps example from the
> documentation) also boost 1:73 produces this data:
> 22 serialization::archive 18
>
> Any idea what has changed in between these versions and could cause this
> problem? Thanks in advance for any hint.
>
> Our application uses an own derived archive class. Maybe I have to changed
> something there?
>
> Best regards
>
> Kai Benndorf
>
>
> ----------------------------------------------------------------
> Kai Benndorf E-Mail: kai.bennd...@web.de
> Zur Maibolte 44 MOBILE: 0151 55627946
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