From 18f97c820a43a1cb103e55b91ba4627e7426e850 Mon Sep 17 00:00:00 2001
From: daylily <i@dayli.ly>
Date: Sat, 10 Jan 2026 01:25:37 +0800
Subject: [PATCH] Fix a panic when checking for magic number in firmware

---
 firmware/src/app.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/firmware/src/app.rs b/firmware/src/app.rs
index 5641898..8e9abfa 100644
--- a/firmware/src/app.rs
+++ b/firmware/src/app.rs
@@ -215,8 +215,8 @@ impl App {
                             {
                                 warn!(
                                     "App: SysEx does not start with magic number; first {} bytes = {}. dropping.",
-                                    MAGIC_NUMBER,
-                                    sysex[..MAGIC_NUMBER_LEN]
+                                    MAGIC_NUMBER_LEN.min(sysex.len()),
+                                    sysex[..MAGIC_NUMBER_LEN.min(sysex.len())]
                                 );
                                 continue;
                             }