Klocwork raises warning on make_unique

Question

I have the following structure,

struct MyStruct{
bool myBool,
int myInt,
std::unique_ptr<boost::circular_buffer<int>> myUniquePtr;
} ;

Let's say I construct the following object,

MyStruct* myStruct = new MyStruct();

I then update the size of my buffer with

myStruct->myUniquePtr = std::make_unique<boost::circular_buffer<int>>(DIM) 

where

 #define DIM 8

It works as expected but my static code analyzer (Klocwork) flags the previous line (the one with make_unique)

LOCRET.ARG: Address of local variable is returned through formal argument

Details:

• Local address "&std::make_unique<boost::circular_buffer < int > >(DIM)" is passed through 'operator=' and stored into 'myStruct->myUniquePtr._M_t'

• 'myStruct->myUniquePtr._M_t' can be used outside of this function

In fact, all lines relying on make_unique yield this warning. I am wondering whether it's a false positive or not.

Minimal Reproducible Example:

struct MyStruct{
        bool myBool,
        int myInt,
        std::unique_ptr<boost::circular_buffer<int>> myUniquePtr;
        } ;

void initMyStruct(MyStruct* pStruct)
{
 pStruct->myUniquePtr = std::make_unique<<boost::circular_buffer<int>>(DIM);
}

and as main:

MyStruct* myStruct = new MyStruct();
initMyStruct(myStruct);