[pygccxml-development] Call policy for a function returning a map

[Vincent F. <vin...@gm...>]

I'm getting segmentation fault errors trying to replace data in a map.

I've have the following attribute in my class :
    std::map<int,property> properties ;

I get this map from a getter function with the following signature:
    map<int,property> & dataBase::getProperties(void) {
       return properties;
    }

Then the method is called from another class in the C++ code :
    map<int,property> &target=DB.getProperties();

And I try to change data in it :
    target[tmpProperty.id]=tmpProperty;

I get the segmentation fault at this line.
The compiled C++ code is completely working alone, I allready tested it.
I can load a file using one of my functions from C++ directly without
any problem, but when I try to use this same function from Python, I
get this segfault.

I think the problem comes from a bad call policy fro this
getProperties() function, but I'm not really sure.
I'm currently using the following one :
    function.call_policies =
call_policies.return_value_policy(call_policies.reference_existing_object)

Thanks in advance for any help!