Nulls in set<string> throw an exception in Java
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                 Key: THRIFT-135
                 URL: https://issues.apache.org/jira/browse/THRIFT-135
             Project: Thrift
          Issue Type: Bug
          Components: Compiler (Java)
            Reporter: David Reiss


>From Amit Sudharshan:

I recently noticed a bug(feature?) in 
com.facebook.thrift.protocol.TBinaryProtocol.writeString where if it is passed 
a null pointer it will throw NPE.

Now, the autogenerated stub code tries to prevent this, however we recently 
came across a case where we had a Set<String> which contained a "NULL" (legal 
in java). Thrift tests to see if the set is non-null and implicitely whether it 
has any elements, both of these pass in this case, and so the null string is 
passed to the writeString method where we get the NPE.

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