From 450bef9e6cbe05e2842b97cf709b594f45128352 Mon Sep 17 00:00:00 2001
From: Floof <98069058+FloofCat@users.noreply.github.com>
Date: Mon, 22 Sep 2025 03:19:30 +0200
Subject: [PATCH] validate block change buffer boundaries for chests

---
 src/procedures.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/procedures.c b/src/procedures.c
index 372d2fb..e7385de 100644
--- a/src/procedures.c
+++ b/src/procedures.c
@@ -579,6 +579,8 @@ uint8_t makeBlockChange (short x, uint8_t y, short z, uint8_t block) {
     // which naturally appends the chest to the end if a gap isn't found.
     int last_real_entry = first_gap - 1;
     for (int i = first_gap; i <= block_changes_count + 15; i ++) {
+      if (i >= MAX_BLOCK_CHANGES) break; // No more space, trigger failBlockChange
+
       if (block_changes[i].block != 0xFF) {
         last_real_entry = i;
         continue;