Java Edition 23w44a

23w44a is the sixth snapshot for Java Edition 1.20.3, released on November 1, 2023,^[1] which makes tweaks to commands, and fixes bugs.

Changes

/execute (if|unless) function will no longer always fail if all functions had no return.
- If there were no /returns in called functions, if will fail and unless will pass.
- First /return in any of called functions will return (for a single context).

If /function <function tag> runs multiple functions in combination with /return run, execution will stop after first /return in any of the functions.
A single call to the /function command will always have return when run with /return run.
- For example, /return run execute [split context] run function <some function with conditional return> will always return after processing the first context.

/return

/return run now always return.
- If there are no valid results from returned command, function containing /return run fails (i.e. success=0 and result=0).
/return run now propagates success value together with results value (previously it always set success to 1).
/return run now also allows storing values, which means /execute store ... run return run some_command both stores value and returns it outside function.
Added new subcommand /return fail, to make whole function fail (i.e. return success=0 and result=0).

/tick

The <time> parameter in the /tick step command is now optional. The default value is 1.

These changes only take effect when the Update 1.21 experimental data pack is enabled.

Now can be crafted from a cut copper by stonecutting, resulting in a chiseled copper with the matching variant.

From released versions before 1.20

MC-219293 – When teleporting via Chorus Fruit, the burping and teleporting sounds play at the wrong location.
MC-257516 – "Fox teleports" sound plays for both Players and Friendly Creatures sound categories.

From the 1.20.3 development versions

MC-265805 – Executing a tail-recursive function consumes memory resources linearly with recursion depth.
MC-266052 – Subtitles for turning copper bulb on or off display raw translation string.
MC-266053 – Subtitles for opening or closing a copper trapdoor display raw translation string.
MC-266064 – Footsteps on Polished Tuff create missing subtitle.
MC-266084 – Top of copper doors include an open part of the window.
MC-266086 – Tuff bricks do not properly align with other bricks.
MC-266105 – Bat head upside down when spawned while ticks are frozen.
MC-266112 – New Bat's ears are lower than the official render and Bedrock's.
MC-266117 – Chiseled copper cannot be stonecut from cut copper blocks.
MC-266147 – Copper Door item texture is inconsistent with the block.

From the previous development version

MC-266197 – The "Transfer Now" button in the realms menu cannot be selected via keyboard navigation.
MC-266215 – The pivot point of the head of the new bats is different from that of Bedrock's.

Videos made by Slicedlime: