MC-124497CanPlaceOn inconsistencies involving looking at blocks
The bug
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no NBT would always be useable despite their NBT in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
This could be a problem due to MC-116254.
How to reproduce
- Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
/give @s golden_apple
- Attempt to eat the apple while in adventure mode and looking at a block
- Now give yourself the same item but with CanPlaceOn NBT for the blocks you are looking at
/give @s golden_apple{CanPlaceOn:["minecraft:stone"]} - Note that you can now consume the apple while looking at the block
- Now place the apple in your offhand slot and place any item without a use into your mainhand, such as a stick or diamond
- Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty
- Now give yourself an item without a use with CanPlaceOn NBT for the blocks you are looking at
/give @s stick{CanPlaceOn:["minecraft:stone"]} - Note that you can again consume the apple with the new NBT'd stick in your mainhand
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion though in previous versions it would be expected that you would be using the mainhanded item initially anyway.
Linked Issues
Created Issue:
CanPlaceOn inconsistencies involving looking at blocks
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing.
this could be a problem due toMC-116254
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potiongive @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.give @s golden_apple{CanPlaceOn:["minecraft:stone"]}
4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.give @s stick{CanPlaceOn:["minecraft:stone"]}
8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion.
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potiongive @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.give @s golden_apple{CanPlaceOn:["minecraft:stone"]}
4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.give @s stick{CanPlaceOn:["minecraft:stone"]}
8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion.
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
{CanPlaceOn:["minecraft:stone"]}
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
{{give @s golden_apple}}
{CanPlaceOn:["minecraft:stone"]}
4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
{{give @s stick}}
8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion.
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
{CanPlaceOn:["minecraft:stone"]}
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potiongive @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
{{give @s golden_apple}}
{CanPlaceOn:["minecraft:stone"]}4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
{{give @s stick}}
8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion.
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
{CanPlaceOn:["minecraft:stone"]}
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
give @s golden_apple4. Note that you can now consume the apple while looking at the block.
{CanPlaceOn:["minecraft:stone"]}
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
give @s stick8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion.
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
{CanPlaceOn:["minecraft:stone"]}
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
give @s golden_apple4. Note that you can now consume the apple while looking at the block.
{CanPlaceOn:["minecraft:stone"]}
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
give @s stick8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion.
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
{CanPlaceOn:["minecraft:stone"]}
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
give @s golden_apple{CanPlaceOn:["minecraft:stone"]}
4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
give @s stick8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion.
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
{CanPlaceOn:["minecraft:stone"]}
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
give @s golden_apple{CanPlaceOn:["minecraft:stone"]}
4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
give @s stick8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion.
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
give @s golden_apple{CanPlaceOn:["minecraft:stone"]}
4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
give @s stick{CanPlaceOn:["minecraft:stone"]}
8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion.
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
give @s golden_apple{CanPlaceOn:["minecraft:stone"]}
4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
give @s stick{CanPlaceOn:["minecraft:stone"]}
8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion
.Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254Steps to Reproduce
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
give @s golden_apple{CanPlaceOn:["minecraft:stone"]}
4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
give @s stick{CanPlaceOn:["minecraft:stone"]}
8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion though in previous versions it would be expected that you would be using the mainhanded item initially anyway
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254.Steps to Reproduce
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
give @s golden_apple{CanPlaceOn:["minecraft:stone"]}
4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
give @s stick{CanPlaceOn:["minecraft:stone"]}
8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion though in previous versions it would be expected that you would be using the mainhanded item initially anyway
![[Mod] Neko](../../../data/avatars/users/92901.png){kind=small}
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254.Steps to Reproduce
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
give @s golden_apple
2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at.
give @s golden_apple{CanPlaceOn:["minecraft:stone"]}4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at.
give @s stick{CanPlaceOn:["minecraft:stone"]}
8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion though in previous versions it would be expected that you would be using the mainhanded item initially anyway
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no nbt would always be useable despite their nbt in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254.Steps to Reproduce
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion/give @s golden_apple2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at./give @s golden_apple{CanPlaceOn:["minecraft:stone"]}4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at./give @s stick{CanPlaceOn:["minecraft:stone"]}8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion though in previous versions it would be expected that you would be using the mainhanded item initially anyway
![[Mod] Michael Wobst](../../../data/avatars/users/37868.png){kind=small}
Use of items from offhand with uses (potions food bows etc..) require
CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the requiredCanPlaceOn NBT.
Despite 1.12 items with nonbtwould always be useable despite theirnbtin any case while in adventure mode.The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOnrather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
this could be a problem due toMC-116254.Steps to Reproduce
1. Give yourself a standard item with a use that is not placing related, such as a golden apple or potion/give @s golden_apple2. Attempt to eat the apple while in adventure mode and looking at a block.
3. Now give yourself the same item but with CanPlaceOn nbt for the blocks you are looking at./give @s golden_apple{CanPlaceOn:["minecraft:stone"]}4. Note that you can now consume the apple while looking at the block.
5. Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond.
6. Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty.
7. Now give yourself an item without a use with CanPlaceOn nbt for the blocks you are looking at./give @s stick{CanPlaceOn:["minecraft:stone"]}8. Note that you can again consume the apple with the new NBT'd stick in your mainhand.
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion though in previous versions it would be expected that you would be using the mainhanded item initially anyway
The bug
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no NBT would always be useable despite their NBT in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
This could be a problem due toMC-116254.How to reproduce
- Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
/give @s golden_apple- Attempt to eat the apple while in adventure mode and looking at a block
- Now give yourself the same item but with CanPlaceOn NBT for the blocks you are looking at
/give @s golden_apple{CanPlaceOn:["minecraft:stone"]}- Note that you can now consume the apple while looking at the block
- Now place the apple in you'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond
- Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty
- Now give yourself an item without a use with CanPlaceOn NBT for the blocks you are looking at
/give @s stick{CanPlaceOn:["minecraft:stone"]}- Note that you can again consume the apple with the new NBT'd stick in your mainhand
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion though in previous versions it would be expected that you would be using the mainhanded item initially anyway.
The bug
Use of items from offhand with uses (potions food bows etc..) require CanPlaceOn NBT tags to be useable whilst looking at blocks in adventure mode.
Additionally when these items have the required NBT to be use-able on, if being used from the offhand slot they also require an item in the players mainhand that also has the required CanPlaceOn NBT.
Despite 1.12 items with no NBT would always be useable despite their NBT in any case while in adventure mode.
The current functionality in the snapshots would also mean that CanPlaceOn is more akin to being CanUseOn rather than only handling placing which would still be inconsistent as you can use these items to interact with noteblocks chests and any other items still.
This could be a problem due toMC-116254.How to reproduce
- Give yourself a standard item with a use that is not placing related, such as a golden apple or potion
/give @s golden_apple- Attempt to eat the apple while in adventure mode and looking at a block
- Now give yourself the same item but with CanPlaceOn NBT for the blocks you are looking at
/give @s golden_apple{CanPlaceOn:["minecraft:stone"]}- Note that you can now consume the apple while looking at the block
- Now place the apple in you
'r offhand slot and place any item without a use into your mainhand, such as a stick or diamond- Switching between mainhand and offhand note that you can only consume the apple while your mainhand is empty
- Now give yourself an item without a use with CanPlaceOn NBT for the blocks you are looking at
/give @s stick{CanPlaceOn:["minecraft:stone"]}- Note that you can again consume the apple with the new NBT'd stick in your mainhand
Additionally the same results will be return with other items that have right click uses when used in place of the stick in this example such as a bow, drinkable/throwable potion though in previous versions it would be expected that you would be using the mainhanded item initially anyway.
relates to
![[Mojang] Nathan Adams](../../../data/assets/gravatar/dinnerbone.png){kind=small}
![[Mojang] Grum (Erik Broes)](../../../data/assets/gravatar/grum.png){kind=small}
[Mojang] Grum (Erik Broes)![[Mod] tryashtar](../../../data/avatars/users/41963.png){kind=small}
Is this an issue on 1.12.2?
no this has only been an issue in the snapshots as far back as 17w51a/b
as far as i know
Partwise duplicates
MC-123366, please change this report to mention only that using the offhand item requires a mainhand item with CanPlaceOn.This is partly fixed in 1.13-pre2. The only problem is that the outline of the block, you're looking at, doesn't appear.
I can't reproduce this – I'm able to eat the apple during all of the situations described in adventure mode.