By accident, when we erroneously tried testing TlsV1_3 on macOS with
SecureTransport (which does not support TLS 1.3) we hit this quite
subtle problem: it can happen that a server-side socket is never
created but a client (after TCP connection was established) fails
in TLS initialization and ... stops the loop preventing
SslServer::incomingConnection() from creating its socket. Then we
dereference nullptr.
Task-number: QTBUG-71638
Change-Id: I8dc5a4c53022a25aafe2c80a6931087517a48441
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
d786c55b9e