[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.benndorf@web.de Zur Maibolte 44 MOBILE: 0151 55627946 32657 Lemgo WORK: 05251 150623 Germany PHONE: 05261 14465 ----------------------------------------------------------------
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-bounces@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.benndorf@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.benndorf@web.de Zur Maibolte 44 MOBILE: 0151 55627946 32657 Lemgo WORK: 05251 150623 Germany PHONE: 05261 14465 ----------------------------------------------------------------
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Kai Benndorf