This occurred when running a QUIC test in an IPv6-only environment:

E1123 16:04:20.282041  159850 heap-profile-table.cc:489] RAW: Leak of 1360 bytes in 17 objects allocated from:
        @ 0x7f160b8923ab gpr_malloc
        @ 0x7f160b8cff27 copy_error_and_unref
        @ 0x7f160b8d0151 grpc_error_set_str
        @ 0x7f160b8e3ff8 error_for_fd
        @ 0x7f160b8e3edd grpc_create_dualstack_socket
        @ 0x7f160b8ea5c3 grpc_udp_server_add_port
        @ 0x7f1627a65d20 grpc_server_add_quic_port
        @ 0x7f1627a6bea4 grpc::(anonymous namespace)::QuicServerCredentialsImpl::AddPortToServer()
        ...