[MC-136147] Riptide tridents use mainhand item to inflict damage when thrown in the offhand

The bug

When you throw a riptide trident in the offhand, you hit with the mainhand item instead. This means that throwing a riptide trident in the offhand while holding nothing in the mainhand will make the trident deal minimal damage. This also means that a sword held in the mainhand will inflict damage, apply most of its enchantments (looting is intended), and take durability damage when you ram into mobs via riptide trident in offhand.

How to reproduce

Setup a scoreboard to count all damage dealt

/scoreboard objectives add Damage minecraft.custom:minecraft.damage_dealt
/scoreboard objectives setdisplay sidebar Damage
/scoreboard players add @s Damage 0

Get a trident with Riptide I and spawn an entity
Throw the trident in mainhand
→ ✔ Score increases with 80
Throw the trident in offhand while holding nothing in main hand
→ ❌ Score increases with 10

Linked issues

is duplicated by 2

MC-175586 Using Riptide in off hand will deal damage according to the item in your main hand, not the actual trident Resolved

MC-263581 Trident in offhand applying damage from main hand Resolved

relates to 2

MC-99063 Looting not working on offhand Resolved

MC-271455 When holding a fire aspect weapon in the mainhand, thrown tridents in the offhand will set mobs on fire Resolved

Attachments

fixed.mp4

MC-136147.mp4

MC-136147 - Damage when holding trident in main hand.png

MC-136147 - Damage when holding trident in offhand.png

Comments 22

gaspoweredpick 2018-08-17T02:17:22Z

Possibly relates to MC-99063

Oval 2018-10-03T19:27:51Z

Can confirm. I'll leave a more detailed way on how to reproduce.

How to reproduce

Setup a scoreboard to count all damage dealt.

/scoreboard objectives add Damage minecraft.custom:minecraft.damage_dealt
/scoreboard objectives setdisplay sidebar Damage
/scoreboard players add @s Damage 0

Get a trident with riptide I and spawn a sheep.
Throw the trident in mainhand
→✔ Score increases with 80.
Throw the trident in offhand
→❌ Score increases with 10.

Asteraoth 2018-10-03T21:13:55Z

I hope you don't mind me updating your ticket. 🙂

gaspoweredpick 2018-10-09T18:54:54Z

It also seems that ~~Impaling~~ or strength work as they should in the offhand. The trident itself is the only thing that does reduced damage.

Edit: Impaling actually doesn't work in the offhand, but strength does add damage. The reason I thought it didn't was because I had a sword in my mainhand, and I discovered that mainhand weapon damage is applied to the offhand trident attack.

Oval 2018-10-17T18:03:59Z

Confirmed for 1.13.2-pre1.

12 more comments

Oval 2018-10-22T01:02:10Z

Confirmed for 1.13.2-pre2.

gaspoweredpick 2018-12-02T03:39:08Z

I have recently discovered that mainhand tool and weapon damage is applied to the offhand trident attack. Certain weapon enchantments like Sharpness, Smite, Bane of Arthropods, Fire Aspect, and Knockback also apply their effects to the offhand trident attack (Looting is a different case since it intentionally applies to any direct kills when the Looting sword is in the mainhand).

gaspoweredpick 2019-02-23T21:33:13Z

Simplified the report.

Loek van Vucht 2019-06-10T11:48:30Z

Confirmed in all 1.14 versions, including 1.14.3 Pre-Release 2.

CalXee 2020-06-04T21:44:07Z

Confirmed for 1.16 Pre-2

jamesmoton 2020-08-09T11:40:44Z

You actually don't need the offhand slot to reproduce this bug. If you throw a trident with Riptide III and switch to another item in your mainhand (such as a golden sword), that sword will still take durability damage and it will be as if you attacked with the sword instead of the trident.

Avoma 2021-02-10T13:02:29Z

Can confirm in 21w05b.

Avoma 2021-02-16T18:15:53Z

Can confirm in 21w06a.

Avoma 2021-02-22T09:01:46Z

Can confirm in 21w07a.

Avoma 2021-06-14T18:43:13Z

Can confirm in 1.17.

Avoma 2021-07-07T17:51:41Z

Can confirm in 1.17.1.

Avoma 2022-01-02T18:09:55Z

Can confirm in 1.18.1.

Avoma 2022-03-10T18:45:48Z

Can confirm in 1.18.2.

[media][media]

Avoma 2022-06-29T12:45:27Z

Can confirm in 1.19.

Avoma 2022-10-18T15:26:21Z

Can confirm in 1.19.2.

4ebugger 2024-03-23T16:01:14Z

Confirm in 24w12a, you can easily kill an enemy with mace while hold trident in the offhand.

J Z 2024-11-13T18:43:07Z

I think this was fixed in 24w19a (the part about applying enchantments is still in the game, but covered under MC-3304). This could also be considered fixed in 24w18a, but riptide tridents did not work correctly in that version. In the "Affected Versions", 24w19a and 24w20a are listed; I cannot reproduce the bug in these versions, nor in any version after them.