Prevent crash with duplicate stat ids, instead return the old one.

gradle.properties

@@ -8,7 +8,7 @@ loader_version=0.15.6-babric.6-bta
 mod_menu_version=2.0.6
 
 # Mod
-mod_version=4.0.7
+mod_version=4.0.8
 mod_group=turniplabs
 mod_name=halplibe
 

src/main/java/turniplabs/halplibe/mixin/accessors/StatListAccessor.java

@@ -0,0 +1,17 @@
+package turniplabs.halplibe.mixin.accessors;
+
+import net.minecraft.core.achievement.stat.Stat;
+import net.minecraft.core.achievement.stat.StatList;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+import java.util.Map;
+
+@Mixin(value = StatList.class,remap = false)
+public interface StatListAccessor {
+
+    @Accessor
+    static Map<Integer, Stat> getStatMap(){
+        throw new AssertionError();
+    }
+}

src/main/java/turniplabs/halplibe/mixin/mixins/StatMixin.java

@@ -0,0 +1,27 @@
+package turniplabs.halplibe.mixin.mixins;
+
+import net.minecraft.core.achievement.stat.Stat;
+import net.minecraft.core.achievement.stat.StatList;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+import turniplabs.halplibe.mixin.accessors.StatListAccessor;
+
+@Mixin(value = Stat.class,remap = false)
+public class StatMixin{
+
+    @Shadow @Final public int statId;
+
+    @Shadow @Final String statName;
+
+    @Inject(method = "registerStat",at = @At("HEAD"), cancellable = true)
+    public void registerStat(CallbackInfoReturnable<Stat> cir) {
+        if (StatListAccessor.getStatMap().containsKey(this.statId)) {
+            System.err.println("Duplicate stat id: \"" + (StatListAccessor.getStatMap().get(this.statId)).getStatName() + "\" and \"" + this.statName + "\" at id " + this.statId);
+            cir.setReturnValue(StatListAccessor.getStatMap().get(this.statId));
+        }
+    }
+}

src/main/java/turniplabs/halplibe/mixin/mixins/registry/MinecraftServerMixin.java

@@ -21,6 +21,9 @@ public void postInit(CallbackInfo ci) {
 			m.invoke(null);
 			m.setAccessible(false);
 			I18n.initialize("en_US");
+			StatList.init();
+			StatList.onBlockInit();
+			StatList.onItemInit();
 		} catch (Throwable err) {
 			throw new RuntimeException(err);
 		}

src/main/resources/halplibe.mixins.json

@@ -9,12 +9,14 @@
     "accessors.EntityFXAccessor",
     "accessors.LanguageAccessor",
     "accessors.RecipeSymbolAccessor",
+    "accessors.StatListAccessor",
     "accessors.TileEntityAccessor",
     "accessors.WeightedRandomBagAccessor",
     "accessors.WeightedRandomBagEntryAccessor",
     "mixins.BlockSoundDispatcherMixin",
     "mixins.ContainerPlayerCreativeMixin",
     "mixins.I18nMixin",
+    "mixins.StatMixin",
     "mixins.commands.CommandsCoreMixin",
     "mixins.network.PacketMixin",
     "mixins.registry.BlockMixin",