From 147c8de4100b849d461adebeca9cdbe99b46209e Mon Sep 17 00:00:00 2001
From: "ask-bonk[bot]" <ask-bonk[bot]@users.noreply.github.com>
Date: Fri, 26 Jun 2026 15:32:08 +0000
Subject: [PATCH] Fix double-panic in panic hook stderr

Co-authored-by: fisherdarling <fisherdarling@users.noreply.github.com>
---
 foundations/src/panic/hook.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/foundations/src/panic/hook.rs b/foundations/src/panic/hook.rs
index a98c5d1..94726ea 100644
--- a/foundations/src/panic/hook.rs
+++ b/foundations/src/panic/hook.rs
@@ -1,5 +1,6 @@
 //! Panic hook implementation for tracking panics.
 
+use std::io::Write;
 use std::panic::{self, PanicHookInfo};
 
 /// Install the panic hook.
@@ -57,7 +58,10 @@ fn log_panic(panic_info: &PanicHookInfo<'_>) {
         "payload": payload,
         "location": location_str
     });
-    eprintln!("{}", json_output);
+    // Grab stderr ourselves and ignore any write error to avoid double-panicking
+    // (e.g. if stderr is closed) within the panic hook.
+    let mut stderr = std::io::stderr().lock();
+    let _ = writeln!(stderr, "{}", json_output);
 }
 
 fn panic_payload_as_str<'a>(panic_info: &'a PanicHookInfo<'_>) -> &'a str {