[omniORB] Potential bug with "empty" valuetype in OmniPy [C1]

[Stephane BONNIEZ]

Hello,

I'm experiencing problems with OmniPy which seem to boil down to the
following test case.
The problem could be reproduced with both Python 2.4 and 2.6 and with
OmniORB 4.1.2 and 4.1.3.

My IDL looks like this:

module valuetypestest {

  valuetype Type1 {
    // Empty
  };

  valuetype Type2 {
    // Empty too
  };

  valuetype CompositeType {
    public Type1 obj1;
    public Type2 obj2;
  };

  interface TestService {
    oneway void doSomething(in CompositeType param);
   };

};

I have a server started, exposing TestService, and I try to call it, so I
instantiate a CompositeType. That's where I get into trouble. If either
obj1 or obj2 is left to None, everything goes all right but if they both
have a not-None value, the client crashes with the following error message:

    omniORB: Assertion failed.  This indicates a bug in the application
    using omniORB, or maybe in omniORB itself.
     file: cdrValueChunkStream.cc
     line: 286
     info: *endp == -(pd_nestLevel + 1)
    omniORB: Unexpected C++ exception during Python invocation.

    This application has requested the Runtime to terminate it in an
unusual way.
    Please contact the application's support team for more information.

The client code is as follows:

    import sys
    from omniORB import CORBA
    import valuetypestest

    orb = CORBA.ORB_init(sys.argv, CORBA.ORB_ID)
    poa = orb.resolve_initial_references("RootPOA")
    obj = orb.string_to_object(sys.argv[1])
    server = obj._narrow(valuetypestest.TestService)

    testParam = valuetypestest.CompositeType()
    testParam.obj1 = valuetypestest.Type1()
    testParam.obj2 = valuetypestest.Type2()
    server.doSomething(testParam)

With -ORBtraceLevel 25 I noticed this right before the failed assertion:
    omniORB: Create Python output value indirection tracker
    omniORB: Start output value header.
    omniORB: Start writing chunked value body. Nest level = 1.
    omniORB: Start output value header.
    omniORB: Start writing chunked value body. Nest level = 2.
->  omniORB: End writing chunked value. Nest level = 2.
    omniORB: Start output value header.
    omniORB: Start writing chunked value body. Nest level = 2.
->  omniORB: End writing nested chunked value. Nest level = 2.

However, I'm stuck here. Can you help me out with this ?

Thanks in advance,

Stephane

PS : I attached the complete source code.

(See attached file: corbaserver.py)(See attached file: corbaclient.py)(See
attached file: valuetypetest.idl)
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