From 443b64a6123f4f0222f7e2631487bf4c512d6ba5 Mon Sep 17 00:00:00 2001
From: Stepan Koltsov <stepan.koltsov@gmail.com>
Date: Mon, 1 Jan 2024 17:10:20 +0000
Subject: [PATCH] Print to stderr from panic handler in LogPlugin (#11170)

# Objective

When panic handler prints to stdout instead of stderr, I've observed two
outcomes with this PR test #11169:
- Sometimes output is mixed up, so it is not clear where one record ends
and another stards
- Sometimes output is lost

## Solution

Print to stderr.

## Changelog

- Panic handler in `LogPlugin` writes to stderr instead of stdin.
---
 crates/bevy_log/src/lib.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/bevy_log/src/lib.rs b/crates/bevy_log/src/lib.rs
index bab058535e..9c0e641de6 100644
--- a/crates/bevy_log/src/lib.rs
+++ b/crates/bevy_log/src/lib.rs
@@ -118,7 +118,7 @@ impl Plugin for LogPlugin {
         {
             let old_handler = panic::take_hook();
             panic::set_hook(Box::new(move |infos| {
-                println!("{}", tracing_error::SpanTrace::capture());
+                eprintln!("{}", tracing_error::SpanTrace::capture());
                 old_handler(infos);
             }));
         }