Unusual End 1.19.2 Shulker Shooter crash

[astral walrus]

The shulker shooters seem to always crash the game when their projectile hits an entity, namely mobs and the player in survival mode.

[delicate gull]

send the crash report

[delicate gull]

But i doubt it's on my end : my mod use vanilla shulker projectiles. Check with the levitation potion effect and look what happened when you're shot by a shulker. I'm pretty sure i was one time reported something like that and in the end it was an issue with a mod affecting all shulker projectiles.

[astral walrus]

Sorry, I fell asleep. Here's the crash report! https://pastebin.com/KvfYsSpT

I'm not totally sure if it's a vanilla shulker thing since the crash report seems to imply it's an issue with the shulker shooter having no attacker data

[delicate gull]

summon a shulker bullet, and try to get hit by a vanilla one

[astral walrus]

Sure thing

[gloomy plover]

@astral walrus, you have reached the level 1!

[astral walrus]

Being hit by a vanilla shulker functions normally, but being hit with a shulker bullet summoned by commands crashes the game

It gives the same crash report

[delicate gull]

so it's not an error on my side

it's due to the EnchantementHelper module

basically a mod modify the EnchantmentHelper.java file

[delicate gull]

are you wearing an enchanted armor

[astral walrus]

No

[delicate gull]

i suspect that a mod is adding something like thorns, trying to get the entity that shot you. Since a projectile is always launched by someone, it's looking for the entity that launched it (like an arrow, the attacker isn't directly the arrow but the skeleton that shot it). Since there is no attacker that launched it, it's bugging

they forgot to add some sort of "if not attacker == null, do stuff", so it's crashing since they didn't took in consideration that a projectile could not be launched by an entity directly

[astral walrus]

Yeah that definitely seems to be the case

I'm not really sure what I could do in this case, since I'm not using any mods I'd really want to get rid of so as a band-aid solution I suppose I could make a data pack to replace the naturally generating shulker shooters with something else

[delicate gull]

it's probably an error of cavern and chasms end, since the mod is still in dev i suspect that they didn't added this (and quark being the only other mod mentionned, the error could have been reported before). I'll next update add some random default value as attacker to avoid this kind of issues

[delicate gull]

i think you could with a command block override the attacker value of all shulker bullets

[astral walrus]

Oh yeah that's probably it, I kinda forgot I had those honestly

Would I need the command block to be running all the time? I feel like that would lag a server or something, no? (I have practically no experience with command blocks)

[delicate gull]

it won't lag, and need to be placed in the overworld spawn chunk (the chunk where a compas is pointing you to)

[astral walrus]

Sure thing