IMFAttributes::CopyAllItems freeze on copying to self

An attempt to copy Media Foundation attribute collection to itself results in a deadlock. Well, it’s not a good idea and a practical one to do a nonsense like this, but the implementation should be resistant to such use either, esp. avoiding the unexpected deadlock.

#include "stdafx.h"
#include <mfapi.h>

#pragma comment(lib, "mfplat.lib")
#pragma comment(lib, "mfuuid.lib")

int main()
{
    _ATLTRY
    {
        ATLENSURE_SUCCEEDED(MFStartup(MF_VERSION));
        CComPtr<IMFAttributes> pAttributes;
        ATLENSURE_SUCCEEDED(MFCreateAttributes(&pAttributes, 1));
        ATLENSURE_SUCCEEDED(pAttributes->SetGUID(MF_MT_SUBTYPE, GUID_NULL));
        ATLENSURE_SUCCEEDED(pAttributes->CopyAllItems(pAttributes)); // <<--- Freeze
    }
    _ATLCATCHALL()
    {
    }
    return 0;
}

The freeze takes place around SRW locks, that is presumably the implementation attempts to lock the data for reading and then once again for writing immediately afterwards.

    ntdll.dll!_NtWaitForAlertByThreadId@8()    Unknown
    ntdll.dll!RtlAcquireSRWLockExclusive()  Unknown
    mfplat.dll!CMFAttributesImpl<struct IMFAttributes,class CMFSRWLock>::DeleteAllItems(void)   Unknown
    mfplat.dll!CMFAttributesImpl<struct IMFAttributes,class CMFSRWLock>::_CloneAllAttributes(struct IMFAttributes *)    Unknown
    mfplat.dll!CMFAttributesImpl<struct IMFAttributes,class CMFSRWLock>::CopyAllItems(struct IMFAttributes *)   Unknown
>   MfSample01.exe!main() Line 15   C++