Minecraft:Java Edition 23w41a

23w41a is the second Minecraft:snapshot for Minecraft:Java Edition 1.20.3, released on October 11, 2023,<ref>Template:Snap</ref> which adds Minecraft:Realms support for all versions, new functionality for Minecraft:decorated pots, reintroduces function-related commands, improves command limits, and fixes bugs.

Additions

General

Particles

• Added new dust_plume particle type.

Changes

Blocks

Minecraft:Decorated pot

• Now can store items, up to a single stack.
  • Minecraft:Hoppers, Minecraft:minecart with hoppers and Minecraft:droppers can now insert and/or extract items from them.
  • Minecraft:Comparators can now read the number of items in them.
  • Minecraft:Players can interact with them and insert items into them.
    • Player interactions cause pots to wobble and trigger a vibration frequency of 11.
  • They have no GUI, and need to be broken to retrieve their content by players.
• Now can be smashed by projectiles, which cause them to shatter and drop their contents.
• Now can stack up to 64.

Non-mob entities

General

• The name of them is now shown if looked at and a CustomName is set, or always displayed if CustomNameVisible is set, similar to living entities.

Command format

Function

• Template:Cmd command has been changed to better accommodate new Template:Cmd command.
• Functions no longer have any result unless they use Template:Cmd or there was an error during lookup or instantiation.
  • That means Template:Cmd command no longer returns (or even displays) the number of commands run during execution.
  • Error conditions:
    • Calling non-existent function.
    • Calling empty function tag.
    • Macro instantiation failure.
• "Result" in this context means values that would be stored with Template:Cmd.
• The previous behavior where every command in a function would perform store if a function was called with Template:Cmd is removed.
  • That means that a single call to function stores at most once (zero times if Template:Cmd was not called).
  • For function tags with multiple entries, function results are accumulated, but partial results are stored at the end of every function.
• Existing limits for functions have been refined to accommodate new execution rules and prevent a wider range of exploits:
  • Limits apply even if run from command line (so it now always behaves as if they were placed in a function).
    • For example, all functions called by Template:Cmd count towards the same limit.
    • Executions from command blocks still count as separate ones.
  • Limit maxCommandChainLength for functions now counts "operations" like:
    • Execution of command for a single context.
    • Execution of a stage in Template:Cmd (no matter how many contexts were modified).
    • Invocation of function.
  • A new limit with game rule maxCommandForkCount now restricts the total amount of context that can be created by single state of functions like Template:Cmd.
    • Example: if there are 5 entities in world, Template:Cmd creates 5 contexts, while Template:Cmd creates 5*5 = 25 contexts.

Template:Cmd

• Re-added (if|unless) function subcommand.
  • A new execute sub-command that runs a function or function tag and matches the return value(s). If a tag is given, all functions run regardless of the results of prior functions.
  • Syntax: Template:Cmd
  • Arguments:
    • function: The function or tag to run.
  • The matching of the result value of the function(s) that run:
    • At least one of the functions must succeed for the match to succeed.
    • A successful call is defined as a function that:
      • Uses the Template:Cmd command to return a value.
      • The return value is not 0.
    • If no functions exited with Template:Cmd, neither if nor unless runs.

Template:Cmd

• Re-added run subcommand: Template:Cmd.
  • This takes the result value from running the specified command and returns that as the return value of the function.
    • If command did not return any value (like, for example, call to a function without Template:Cmd), Template:Cmd doesn't execute and function continues execution.
    • If the given command fails, the return value is 0.
    • In all other aspects, it works like Template:Cmd with a specified return value.
    • In case of fork (for example Template:Cmd), the first execution of the command returns.
      • If there are no executions (for example in Template:Cmd), function doesn't return and continues execution.

General

Minecraft:Data pack

• The Minecraft:pack format version is now 20.

Minecraft:Realms

• Are now available in snapshots, pre-releases, and release candidates.
  • Any player who has an active Realms subscription is eligible to create a free snapshot realm.
  • Snapshot realms are separate from the regular realms to prevent any issues from impacting regular realms.
• The version of the last played world on a realm is displayed in the realms list.
• Experiments are available for newly created worlds.