--- a/net/minecraft/core/RegistryMaterials.java
+++ b/net/minecraft/core/RegistryMaterials.java
@@ -201,7 +201,7 @@
             });
         }
 
-        return SystemUtils.getRandom(this.randomCache, random);
+        return (T) SystemUtils.getRandom(this.randomCache, random); // CraftBukkit - decompile error
     }
 
     @Override
@@ -228,7 +228,7 @@
             return registrymaterials;
         }, (registrymaterials) -> {
             Builder<RegistryMaterials.a<T>> builder = ImmutableList.builder();
-            Iterator iterator = registrymaterials.iterator();
+            Iterator<T> iterator = registrymaterials.iterator(); // CraftBukkit - decompile error
 
             while (iterator.hasNext()) {
                 T t0 = iterator.next();
@@ -257,8 +257,10 @@
         });
     }
 
-    private static final class a extends Record {
+    // CraftBukkit start
+    private static final record a<T>(ResourceKey<T> key, int id, T value) {
 
+        /*
         private final ResourceKey<T> key;
         private final int id;
         private final T value;
@@ -292,5 +294,7 @@
         public T value() {
             return this.value;
         }
+         */
+        // CraftBukkit end
     }
 }