Fix usage of deprecated netty method

build.gradle

@@ -34,7 +34,7 @@ archivesBaseName = "replaymod"
 
 minecraft {
     coreMod = 'com.replaymod.core.LoadingPlugin'
-    version = '1.12-14.21.0.2327'
+    version = '1.12-14.21.1.2387'
     runDir = "eclipse"
     mappings = "snapshot_20170615"
     replace '@MOD_VERSION@', project.version

src/main/java/com/replaymod/core/gui/GuiFactory.java

@@ -24,18 +24,8 @@ public class GuiFactory implements IModGuiFactory {
         return new GuiReplaySettings(parentScreen, ReplayMod.instance.getSettingsRegistry()).toMinecraft();
     }
 
-    @Override
-    public Class<? extends GuiScreen> mainConfigGuiClass() {
-        return null;
-    }
-
     @Override
     public Set<RuntimeOptionCategoryElement> runtimeGuiCategories() {
         return null;
     }
-
-    @Override
-    public RuntimeOptionGuiHandler getHandlerFor(RuntimeOptionCategoryElement element) {
-        return null;
-    }
 }

src/main/java/com/replaymod/core/utils/ModCompat.java

@@ -4,22 +4,22 @@ import com.replaymod.replaystudio.data.ModInfo;
 import net.minecraft.util.ResourceLocation;
 import net.minecraftforge.fml.common.Loader;
 import net.minecraftforge.fml.common.ModContainer;
-import net.minecraftforge.fml.common.registry.GameData;
+import net.minecraftforge.registries.ForgeRegistry;
+import net.minecraftforge.registries.RegistryManager;
 
 import java.util.*;
 import java.util.function.Function;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 public class ModCompat {
     @SuppressWarnings("unchecked")
     public static Collection<ModInfo> getInstalledNetworkMods() {
         Map<String, ModContainer> ignoreCaseMap = Loader.instance().getModList().stream()
                 .collect(Collectors.toMap(m -> m.getModId().toLowerCase(), Function.identity()));
-        return Stream.concat(
-                ((Set<ResourceLocation>) GameData.getBlockRegistry().getKeys()).stream(),
-                ((Set<ResourceLocation>) GameData.getItemRegistry().getKeys()).stream()
-        ).map(ResourceLocation::getResourceDomain).filter(s -> !s.equals("minecraft")).distinct()
+        return RegistryManager.ACTIVE.takeSnapshot(false).keySet().stream()
+                .map(RegistryManager.ACTIVE::getRegistry)
+                .map(ForgeRegistry::getKeys).flatMap(Set::stream)
+                .map(ResourceLocation::getResourceDomain).filter(s -> !s.equals("minecraft")).distinct()
                 .map(String::toLowerCase).map(ignoreCaseMap::get).filter(mod -> mod != null)
                 .map(mod -> new ModInfo(mod.getModId(), mod.getName(), mod.getVersion()))
                 .collect(Collectors.toList());

src/main/java/com/replaymod/replay/ReplaySender.java

@@ -50,6 +50,9 @@ public class ReplaySender extends ChannelInboundHandlerAdapter {
      */
     private static final List<Class> BAD_PACKETS = Arrays.<Class>asList(
             // TODO Update possibly more?
+            SPacketRecipeBook.class,
+            SPacketAdvancementInfo.class,
+            SPacketSelectAdvancementsTab.class,
             SPacketUpdateHealth.class,
             SPacketOpenWindow.class,
             SPacketCloseWindow.class,
@@ -504,7 +507,7 @@ public class ReplaySender extends ChannelInboundHandlerAdapter {
     @SuppressWarnings("unchecked")
     public void channelActive(ChannelHandlerContext ctx) throws Exception {
         this.ctx = ctx;
-        ctx.attr(NetworkManager.PROTOCOL_ATTRIBUTE_KEY).set(EnumConnectionState.PLAY);
+        ctx.channel().attr(NetworkManager.PROTOCOL_ATTRIBUTE_KEY).set(EnumConnectionState.PLAY);
         super.channelActive(ctx);
     }