[1.02.5/1.20.6] sync error and client kick when lighting a nether portal

[desht]

Lighting a Nether portal in the usual way causes the player to be kicked with a sync error, triggered by TOP

Stacktrace here: https://gist.github.com/desht/d97031c4da6307cbeb66ea2654467507

Looks like you might need to be using a ItemStack.OPTIONAL_STREAM_CODEC rather than ItemStack.STREAM_CODEC there.

(Update: quite a big problem, since the player immediately gets kicked again when logging back in. Guessing it's because the nether portal block the player is looking at has no item drop?)

[McJty]

I'll check it out soon

[McJty]

Fixed