Paper/nms-patches/ExpiringMap.patch

--- a/net/minecraft/server/ExpiringMap.java
+++ b/net/minecraft/server/ExpiringMap.java
@@ -4,8 +4,10 @@
 import it.unimi.dsi.fastutil.longs.Long2LongMap;
 import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
 import it.unimi.dsi.fastutil.longs.Long2LongMap.Entry;
+import it.unimi.dsi.fastutil.objects.ObjectCollection;
 import it.unimi.dsi.fastutil.objects.ObjectIterator;
 import java.util.Map;
+import java.util.function.LongFunction;
 
 public class ExpiringMap<T> extends Long2ObjectOpenHashMap<T> {
 
@@ -21,11 +23,17 @@
         long j = SystemUtils.getMonotonicMillis();
 
         this.b.put(i, j);
-        ObjectIterator objectiterator = this.b.long2LongEntrySet().iterator();
+        cleanup();
+        // CraftBukkit start
+    }
+
+    public void cleanup() {
+        long j = SystemUtils.getMonotonicMillis();
+        ObjectIterator<Long2LongMap.Entry> objectiterator = this.b.long2LongEntrySet().iterator(); // CraftBukkit - decompile error
 
         while (objectiterator.hasNext()) {
-            Entry entry = (Entry) objectiterator.next();
-            Object object = super.get(entry.getLongKey());
+            Long2LongMap.Entry entry = (Long2LongMap.Entry) objectiterator.next(); // CraftBukkit - decompile error
+            T object = super.get(entry.getLongKey()); // CraftBukkit - decompile error
 
             if (j - entry.getLongValue() <= (long) this.a) {
                 break;
@@ -36,6 +44,7 @@
                 objectiterator.remove();
             }
         }
+        // CraftBukkit end
 
     }
 
@@ -69,4 +78,18 @@
     public T remove(Object object) {
         throw new RuntimeException("Not implemented");
     }
+
+    // CraftBukkit start
+    @Override
+    public T computeIfAbsent(long l, LongFunction<? extends T> lf) {
+        this.b.put(l, SystemUtils.getMonotonicMillis());
+        return super.computeIfAbsent(l, lf);
+    }
+
+    @Override
+    public ObjectCollection<T> values() {
+        cleanup();
+        return super.values();
+    }
+    // CraftBukkit end    
 }