Comment 4 for bug 1286611

It is unsafe to assign an pointer that is returned by the new operator directly because the target variable was eventually not initialised with a well-known value like "nullptr" before a C++ exception would occur. So I suggest to improve the remaining source code places.

I'm sorry that I was not aware that a class like "unique_ptr" has got some uses in your code base already. I would appreciate if its usage can be completed.