1.8.8 player on 1.20.4 server kicked when right clicking blocks

[Jaden]

/viaversion dump Output

https://dump.viaversion.com/2157df1bae4938b4b7cdfc2bfc4e3c9ddc7c7d706217c864cce792eb5b2fc99f

Console Error

[1.8.8](https://mclo.gs/qLtQWoE)

Bug Description

Right clicking blocks causes a netty error and kicks the player on a 1.20.4 server.

Steps to Reproduce

Login with a 1.7 or 1.8 Client and right click any block

Expected Behavior

No kick or exception

Additional Server Info

public class LookFixListener extends SimplePacketListenerAbstract {
    private static final EnumSet<PacketType.Play.Client> DELAYED_PACKETS = EnumSet.of(PacketType.Play.Client.PLAYER_BLOCK_PLACEMENT);
    private final Map<User, List<PacketWrapper<?>>> delayedActions = new HashMap<>();

    @Override
    public void onPacketPlayReceive(PacketPlayReceiveEvent event) {
        if (!event.getUser().getClientVersion().equals(ClientVersion.V_1_8)) {
            return;
        }

        if (DELAYED_PACKETS.contains(event.getPacketType())) {
            this.delayedActions.get(event.getUser()).add(new PacketWrapper<>(event.clone()));
            event.setCancelled(true);
        } else if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())){
            handleFly(event.getUser());
        }
    }

    public void handleFly(User user) {
        for (PacketWrapper<?> wrapper : this.delayedActions.get(user)) {
            PacketEvents.getAPI().getProtocolManager().receivePacketSilently(user.getChannel(), wrapper);
        }
    }

    @Override
    public void onUserConnect(UserConnectEvent event) {
        this.delayedActions.put(event.getUser(), new ArrayList<>());
    }

    @Override
    public void onUserDisconnect(UserDisconnectEvent event) {
        super.onUserDisconnect(event);
    }
}

Checklist

• Via plugins are only running on EITHER the backend servers (e.g. Paper) OR the proxy (e.g. BungeeCord), not on both.
• I have included a ViaVersion dump.
• If applicable, I have included a paste (not a screenshot) of the error.
• I have tried the latest build(s) from https://ci.viaversion.com/ and the issue still persists.
• I have looked at https://www.spigotmc.org/resources/viarewind-legacy-support.52924/ and it does not offer a fix for my problem

[Barvalg [Bot]]

Please update all Via* plugins from https://ci.viaversion.com/. In case the issue still persists send the new dump and the issue will be reopened

stack,outdated_proxy

[Jaden]

https://dump.viaversion.com/670b6b26a1f6e9641b506a73123e11b2d58632cc25012d1afd055c2aa1d3e1c5

I've debugged and found the following code to be the issue:

public class LookFixListener extends SimplePacketListenerAbstract {
    private static final EnumSet<PacketType.Play.Client> DELAYED_PACKETS = EnumSet.of(PacketType.Play.Client.PLAYER_BLOCK_PLACEMENT);
    private final Map<User, List<PacketWrapper<?>>> delayedActions = new HashMap<>();

    @Override
    public void onPacketPlayReceive(PacketPlayReceiveEvent event) {
        if (!event.getUser().getClientVersion().equals(ClientVersion.V_1_8)) {
            return;
        }

        if (DELAYED_PACKETS.contains(event.getPacketType())) {
            this.delayedActions.get(event.getUser()).add(new PacketWrapper<>(event.clone()));
            event.setCancelled(true);
        } else if (WrapperPlayClientPlayerFlying.isFlying(event.getPacketType())){
            handleFly(event.getUser());
        }
    }

    public void handleFly(User user) {
        for (PacketWrapper<?> wrapper : this.delayedActions.get(user)) {
            PacketEvents.getAPI().getProtocolManager().receivePacketSilently(user.getChannel(), wrapper);
        }
    }

    @Override
    public void onUserConnect(UserConnectEvent event) {
        this.delayedActions.put(event.getUser(), new ArrayList<>());
    }

    @Override
    public void onUserDisconnect(UserDisconnectEvent event) {
        super.onUserDisconnect(event);
    }
}

[Barvalg [Bot]]

[EnZaXD]

Does this also happen with 1.9+ clients?

[Jaden]

Does this also happen with 1.9+ clients?

Not a ViaVersion issue