From f6ae2505d999305e1b5618fca9d928d96d9299af Mon Sep 17 00:00:00 2001
From: Jakub Konka <kubkon@jakubkonka.com>
Date: Fri, 31 Jul 2020 19:16:04 +0200
Subject: [PATCH] Fix opening NUL device on Windows

---
 lib/std/child_process.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/std/child_process.zig b/lib/std/child_process.zig
index 022405f922..5754cc2d53 100644
--- a/lib/std/child_process.zig
+++ b/lib/std/child_process.zig
@@ -484,7 +484,7 @@ pub const ChildProcess = struct {
         const nul_handle = if (any_ignore)
             windows.OpenFile(&[_]u16{ 'N', 'U', 'L' }, .{
                 .dir = std.fs.cwd().fd,
-                .access_mask = windows.GENERIC_READ,
+                .access_mask = windows.GENERIC_READ | windows.SYNCHRONIZE,
                 .share_access = windows.FILE_SHARE_READ,
                 .creation = windows.OPEN_EXISTING,
                 .io_mode = .blocking,