Bug with KVNameValueList(std::initializer_list) constructor

The following code goes badly awry:

void copy_my_list(const KVNameValueList& nvl)
{
    std::cout << "copy_my_list\n";
    KVNameValueList copylist(nvl);
    copylist.ls();
}

void test()
{
    KVNameValueList A{{"Name","Bernard"}};
    copy_my_list(A);
    A.ls();
}

kaliveda[0] test()
copy_my_list
KVNameValueList : Name=Bernard

 *** Break *** segmentation violation
KVNameValueList : 

because in the std::initializer_list constructor the underlying KVHashList which contains all the parameters of the list was not made the owner of its objects, therefore in the copy constructor only a shallow copy of the list is made (copies the addresses of the existing objects), then (bizarrely - no need to do this) at the end of the copy constructor the KVHashList of the new copy is set to owning: it therefore deletes the parameters of its 'parent' list which is left with a list of stale pointers.