From 83aebf8f7bb6d766f6b68accdc44acb9cea3d57e Mon Sep 17 00:00:00 2001
From: Dan Gohman <dev@sunfishcode.online>
Date: Wed, 12 Jan 2022 11:41:48 -0800
Subject: [PATCH] Use the correct `cvt` for converting socket errors on
 Windows.

`WSADuplicateSocketW` returns 0 on success, which differs from
handle-oriented functions which return 0 on error. Use `sys::net::cvt`
to handle its return value, which handles the socket convention of
returning 0 on success, rather than `sys::cvt`, which handles the
handle-oriented convention of returning 0 on failure.
---
 library/std/src/os/windows/io/socket.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/library/std/src/os/windows/io/socket.rs b/library/std/src/os/windows/io/socket.rs
index e0af4f1f6cb1..26b569bcdd36 100644
--- a/library/std/src/os/windows/io/socket.rs
+++ b/library/std/src/os/windows/io/socket.rs
@@ -8,6 +8,7 @@ use crate::io;
 use crate::marker::PhantomData;
 use crate::mem;
 use crate::mem::forget;
+use crate::sys;
 use crate::sys::c;
 use crate::sys::cvt;
 
@@ -80,7 +81,7 @@ impl OwnedSocket {
         let result = unsafe {
             c::WSADuplicateSocketW(self.as_raw_socket(), c::GetCurrentProcessId(), &mut info)
         };
-        cvt(result)?;
+        sys::net::cvt(result)?;
         let socket = unsafe {
             c::WSASocketW(
                 info.iAddressFamily,