From 95802b8f249ef3594d374eb6b40dc4c6466a0a78 Mon Sep 17 00:00:00 2001
From: Kenneth <5223214+UPSOKen@users.noreply.github.com>
Date: Fri, 1 Aug 2025 11:58:59 -0500
Subject: [PATCH] griefprevention: avoid ConcurrentModificationException

---
 .../squaremap/addon/griefprevention/task/SquaremapTask.java    | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/addons/griefprevention/src/main/java/xyz/jpenilla/squaremap/addon/griefprevention/task/SquaremapTask.java b/addons/griefprevention/src/main/java/xyz/jpenilla/squaremap/addon/griefprevention/task/SquaremapTask.java
index 5233950..32e84a2 100644
--- a/addons/griefprevention/src/main/java/xyz/jpenilla/squaremap/addon/griefprevention/task/SquaremapTask.java
+++ b/addons/griefprevention/src/main/java/xyz/jpenilla/squaremap/addon/griefprevention/task/SquaremapTask.java
@@ -47,7 +47,8 @@ void updateClaims() {
         this.provider.clearMarkers(); // TODO track markers instead of clearing them
         Collection<Claim> topLevelClaims = GPHook.getClaims();
         if (topLevelClaims != null) {
-            topLevelClaims.stream()
+            List<Claim> snapshot = new ArrayList<>(topLevelClaims);
+            snapshot.stream()
                 .filter(claim -> claim.getGreaterBoundaryCorner().getWorld().getUID().equals(this.bukkitWorld.getUID()))
                 .filter(claim -> claim.parent == null)
                 .forEach(this::handleClaim);