Chandler May created THRIFT-4020:
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Summary: UnboundLocalError for optional field in read of immutable
type
Key: THRIFT-4020
URL: https://issues.apache.org/jira/browse/THRIFT-4020
Project: Thrift
Issue Type: Bug
Components: Python - Compiler
Affects Versions: 0.10.0
Reporter: Chandler May
During the read method of a structure annotated as immutable, if the value of
an optional field is not read (if it is unset in the serialized structure) an
UnboundLocalError is thrown when the class is instantiated.
This is caused by storing the deserialized fields in local variables declared
in nested scopes and instantiating the structure at the end of the read method:
if an optional field is not set in the serialized object, the variable storing
its deserialized representation---in this case, None---is never declared.
I think this would be fixed by declaring variables for all fields at the top of
the read method, initializing them to their defaults in thrift_spec.
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