diff -r -U 3 minecraft_server\net\minecraft\advancements\AdvancementList.java minecraft_server_patched\net\minecraft\advancements\AdvancementList.java
--- minecraft_server\net\minecraft\advancements\AdvancementList.java
+++ minecraft_server_patched\net\minecraft\advancements\AdvancementList.java
@@ -21,7 +21,7 @@
    private AdvancementList.Listener field_192095_e;
 
    public void func_192083_a(Map<ResourceLocation, Advancement.Builder> p_192083_1_) {
-      Function<ResourceLocation, Advancement> function = Functions.<ResourceLocation, Advancement>forMap(this.field_192092_b, (Object)null);
+      Function<ResourceLocation, Advancement> function = Functions.<ResourceLocation, Advancement>forMap(this.field_192092_b, null);
 
       label42:
       while(!p_192083_1_.isEmpty()) {