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Posted to dev@thrift.apache.org by "Ali-Akber Saifee (Jira)" <ji...@apache.org> on 2021/12/12 00:36:00 UTC
[jira] [Updated] (THRIFT-5488) SystemError when using fast binary or compact protocol in python 3.10
[ https://issues.apache.org/jira/browse/THRIFT-5488?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ali-Akber Saifee updated THRIFT-5488:
-------------------------------------
Summary: SystemError when using fast binary or compact protocol in python 3.10 (was: SystemError when using fast binary protocol in python 3.10 )
> SystemError when using fast binary or compact protocol in python 3.10
> ----------------------------------------------------------------------
>
> Key: THRIFT-5488
> URL: https://issues.apache.org/jira/browse/THRIFT-5488
> Project: Thrift
> Issue Type: Bug
> Components: Python - Library
> Affects Versions: 0.15.0
> Reporter: Ali-Akber Saifee
> Priority: Major
>
> Up till python 3.9 a DeprecationWarning was raised when '#' formats were used without defining PY_SSIZE_T_CLEAN:
>
> {code:java}
> DeprecationWarning: PY_SSIZE_T_CLEAN will be required for '#' formats
> iprot._fast_decode(self, iprot, [self.__class__, self.thrift_spec]) {code}
>
> Starting with python 3.10 this now becomes a runtime SystemError. Details of change: [Python bug tracker 40943|https://bugs.python.org/issue40943]
> This specifically gets exercised in the fast binary python extension module in ProtocolBase<Impl>::readBytes ([src/protocol.tcc|https://github.com/apache/thrift/blob/master/lib/py/src/ext/protocol.tcc#L279]) when falling back to the building function.
> An easy way to reproduce the error is to pass an empty byte array to the [TSerializer.deserialize|https://github.com/apache/thrift/blob/master/lib/py/src/TSerialization.py#L32] method, for example:
> {code:java}
> buf = TTransport.TMemoryBuffer()
> transport = TTransport.TBufferedTransportFactory().getTransport(buf)
> factory = TBinaryProtocolAcceleratedFactory(transport)
> TSerialization.deserialize(Message(), b'', factory) # Message is a thrift struct. This raises a SystemError in python 3.10+{code}
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