Copy without assign

This class has a user-defined copy constructor but no user-defined assignment operator. If the copy constructor is necessary to manage owned resources then a corresponding assignment operator is usually required. If an object of this type is assigned memory leaks and/or use-after-free errors may occur. Note that a compiler-generated assignment operator will perform only a bit-wise copy for any fields that do not have their own assignment operators defined. Class has user-written copy constructor but no user-written assignment operator
/src/mongo/db/storage/ephemeral_for_test/ephemeral_for_test_radix_store.h:78: COPY_WITHOUT_ASSIGN 115958 Class "mongo::ephemeral_for_test::RadixStore<std::_cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::Head" has a user-written copy constructor "mongo::ephemeral_for_test::RadixStore<std::cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::Head::Head(mongo::ephemeral_for_test::RadixStore<std::cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::_cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::Head const &)" but no corresponding user-written assignment operator.
/src/mongo/db/storage/ephemeral_for_test/ephemeral_for_test_radix_store.h:950: COPY_WITHOUT_ASSIGN 115958 User-written copy constructor.