https://bugs.winehq.org/show_bug.cgi?id=45397
--- Comment #3 from Anderson Sasaki ansasaki@redhat.com --- (In reply to Zebediah Figura from comment #2)
Is there an application that depends on this failing?
Not an application, but libssh (https://www.libssh.org/) is relying on WSAStringToAddressA to detect valid IP addresses when built for Windows.
So, if an application uses libssh and is run on wine, it would incorrectly accept incomplete IP addresses if the execution is based on the result of the call to ssh_is_ipaddr() (which calls WSAStringToAddressA).