From 8f1b48b0abadf034b61f098f847bf3fbed70d65d Mon Sep 17 00:00:00 2001
From: Daniel Mills <danielmillst@gmail.com>
Date: Fri, 23 Jul 2021 08:49:03 -0400
Subject: [PATCH] Fix paper async chunk errors

---
 .../iris/core/pregenerator/methods/AsyncPregenMethod.java    | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/main/java/com/volmit/iris/core/pregenerator/methods/AsyncPregenMethod.java b/src/main/java/com/volmit/iris/core/pregenerator/methods/AsyncPregenMethod.java
index 43fdb27d4..ff2551caf 100644
--- a/src/main/java/com/volmit/iris/core/pregenerator/methods/AsyncPregenMethod.java
+++ b/src/main/java/com/volmit/iris/core/pregenerator/methods/AsyncPregenMethod.java
@@ -69,15 +69,14 @@ public class AsyncPregenMethod implements PregeneratorMethod {
     }
 
     private void waitForChunks() {
-        for (CompletableFuture<?> i : future) {
+        for (CompletableFuture<?> i : future.copy()) {
             try {
                 i.get();
+                future.remove(i);
             } catch (Throwable e) {
                 e.printStackTrace();
             }
         }
-
-        future.clear();
     }
 
     @Override