From bfc5096e77ae5f310e3b8471c1a9abe6a9e8fe15 Mon Sep 17 00:00:00 2001
From: heidezomp <heidezomp@protonmail.com>
Date: Mon, 26 Oct 2020 23:59:16 +0100
Subject: [PATCH] linuxWaitFd: make NetworkSubsystemFailed error unreachable

This error from os.poll is Windows-specific, so unreachable on Linux.
---
 lib/std/event/loop.zig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/std/event/loop.zig b/lib/std/event/loop.zig
index 8fd7df0d6f76..e4d2af952c7d 100644
--- a/lib/std/event/loop.zig
+++ b/lib/std/event/loop.zig
@@ -466,8 +466,9 @@ pub const Loop = struct {
                         .revents = undefined,
                     }};
                     _ = os.poll(&pfd, -1) catch |poll_err| switch (poll_err) {
+                        error.NetworkSubsystemFailed => unreachable, // only possible on windows
+
                         error.SystemResources,
-                        error.NetworkSubsystemFailed,
                         error.Unexpected,
                         => {
                             // Even poll() didn't work. The best we can do now is sleep for a