1.20.5-rc1

api/src/main/java/com/viaversion/viaversion/api/protocol/version/ProtocolVersion.java

@@ -83,7 +83,7 @@ public class ProtocolVersion implements Comparable<ProtocolVersion> {
     public static final ProtocolVersion v1_20 = register(763, "1.20/1.20.1", new SubVersionRange("1.20", 0, 1));
     public static final ProtocolVersion v1_20_2 = register(764, "1.20.2");
     public static final ProtocolVersion v1_20_3 = register(765, "1.20.3/1.20.4", new SubVersionRange("1.20", 3, 4));
-    public static final ProtocolVersion v1_20_5 = register(766, 188, "1.20.5");
+    public static final ProtocolVersion v1_20_5 = register(766, 189, "1.20.5");
     public static final ProtocolVersion unknown = new ProtocolVersion(VersionType.SPECIAL, -1, -1, "UNKNOWN", null);
 
     public static ProtocolVersion register(int version, String name) {

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_20_5to1_20_3/Protocol1_20_5To1_20_3.java

@@ -62,6 +62,9 @@ import static com.viaversion.viaversion.util.ProtocolUtil.packetTypeMap;
 public final class Protocol1_20_5To1_20_3 extends AbstractProtocol<ClientboundPacket1_20_3, ClientboundPacket1_20_5, ServerboundPacket1_20_3, ServerboundPacket1_20_5> {
 
     public static final MappingData MAPPINGS = new MappingData();
+    // Mojang will remove this in the next release, so if we were to set this to false,
+    // people would miss the changes and not fix their plugins before forcefully running into the errors then
+    public static boolean strictErrorHandling = System.getProperty("viaversion.strict-error-handling1_20_5", "true").equalsIgnoreCase("true");
     private final EntityPacketRewriter1_20_5 entityRewriter = new EntityPacketRewriter1_20_5(this);
     private final BlockItemPacketRewriter1_20_5 itemRewriter = new BlockItemPacketRewriter1_20_5(this);
     private final TagRewriter<ClientboundPacket1_20_3> tagRewriter = new TagRewriter<>(this);
@@ -204,6 +207,20 @@ public final class Protocol1_20_5To1_20_3 extends AbstractProtocol<ClientboundPa
 
         new CommandRewriter1_19_4<>(this).registerDeclareCommands1_19(ClientboundPackets1_20_3.DECLARE_COMMANDS);
 
+        registerClientbound(State.LOGIN, ClientboundLoginPackets.GAME_PROFILE, wrapper -> {
+            wrapper.passthrough(Type.UUID); // UUID
+            wrapper.passthrough(Type.STRING); // Name
+
+            final int properties = wrapper.passthrough(Type.VAR_INT);
+            for (int i = 0; i < properties; i++) {
+                wrapper.passthrough(Type.STRING); // Name
+                wrapper.passthrough(Type.STRING); // Value
+                wrapper.passthrough(Type.OPTIONAL_STRING); // Signature
+            }
+
+            wrapper.write(Type.BOOLEAN, strictErrorHandling);
+        });
+
         cancelServerbound(State.LOGIN, ServerboundLoginPackets.COOKIE_RESPONSE.getId());
         cancelServerbound(ServerboundConfigurationPackets1_20_5.COOKIE_RESPONSE);
         cancelServerbound(ServerboundConfigurationPackets1_20_5.SELECT_KNOWN_PACKS);

gradle.properties

@@ -1,5 +1,5 @@
 # Project properties - we put these here so they can be modified without causing a recompile of the build scripts
-projectVersion=4.10.0-1.20.5-pre4-SNAPSHOT
+projectVersion=4.10.0-1.20.5-rc1-SNAPSHOT
 
 # Smile emoji
 mcVersions=1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4, 1.19.3, 1.19.2, 1.19.1, 1.19, 1.18.2, 1.18.1, 1.18, 1.17.1, 1.17, 1.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1, 1.16, 1.15.2, 1.15.1, 1.15, 1.14.4, 1.14.3, 1.14.2, 1.14.1, 1.14, 1.13.2, 1.13.1, 1.13, 1.12.2, 1.12.1, 1.12, 1.11.2, 1.11.1, 1.11, 1.10.2, 1.10.1, 1.10, 1.9.4, 1.9.3, 1.9.2, 1.9.1, 1.9, 1.8.9