From c9be17adbacc1271e6c1ae19ad01074c717b72e5 Mon Sep 17 00:00:00 2001
From: Markus Pettersson <markus.pettersson@mullvad.net>
Date: Fri, 30 Aug 2024 14:57:13 +0200
Subject: [PATCH] Print stderr if spawned subcommand fails

Fix bug where stdout was printed instead of stderr if a spawned
subcommand failed.
---
 wireguard-go-rs/build.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wireguard-go-rs/build.rs b/wireguard-go-rs/build.rs
index 29759417e941..da981770d0bf 100644
--- a/wireguard-go-rs/build.rs
+++ b/wireguard-go-rs/build.rs
@@ -285,7 +285,7 @@ fn exec(mut command: impl BorrowMut<Command>) -> anyhow::Result<String> {
     let stdout = str::from_utf8(&output.stdout).unwrap_or("Invalid UTF-8");
 
     if !output.status.success() {
-        let stderr = str::from_utf8(&output.stdout).unwrap_or("Invalid UTF-8");
+        let stderr = str::from_utf8(&output.stderr).unwrap_or("Invalid UTF-8");
 
         eprintln!("Error from {command:?}");
         eprintln!();