XQilla

In XQilla 2.2.0 the copy constructor of Result (src/runtime/Result.cpp)
doesn't really creates a copy: The old instance becomes invalid.
I'm not sure, what's the reason for this behaviour, but it is unexpected. A
copy constructor should consider its argument as constant!
How can I create a copy of Result then?

Result::Result(const Result &o) : _impl(o._impl)
{
if(_impl) {
_impl->setResultPointer(this);
const_cast<Result&>(o)._impl = 0;
}
}