PocketMine-MP/changelogs/3.15.md

**For Minecraft: Bedrock Edition 1.16.20**

### Note about API versions
Plugins which don't touch the protocol and compatible with any previous 3.x.y version will also run on these releases and do not need API bumps.
Plugin developers should **only** update their required API to this version if you need the changes in this build.

**WARNING: If your plugin uses the protocol, you're not shielded by API change constraints.** You should consider using the `mcpe-protocol` directive in `plugin.yml` as a constraint if you do.

# 3.15.0
- Added support for Minecraft: Bedrock Edition 1.16.20.
- Removed compatibility with 1.16.0.

## Known issues (please don't open issues for these)
- Walls don't connect to each other
- Pumpkin and melon stems may not connect to their corresponding pumpkin/melon
- New blocks, items & mobs aren't implemented
- Nether doesn't exist

# 3.15.1
- Fixed various PHP 7.4 compatibility issues in Composer dependencies (primarily callback-validator).
- Fixed LevelDB worlds with corrupted `level.dat` crashing the server instead of failing gracefully.
- Fixed error spam when using strings for layers in flatworld presets (`e.g. bedrock,3xdirt,grass`).
- Fixed blocks not getting updated properly on explosions.
- Fixed `BlockGrowEvent` not being called when sugarcane grows.
- Potato crops now drop poisonous potatoes when harvested.
- Fixed the wrong number of potatoes being dropped when harvesting potato crops.
- Players no longer get pullbacks when sprinting on slabs, stairs and various other blocks when `player.anti-cheat.allow-movement-cheats` is set to `false`. (This bug has been around for over 5 years, so many of you will be used to its existence.)
- Fixed entity collision box calculation not taking clip distance into account.
- Entities now step up the correct height of the target block, instead of jumping into the air 0.6 blocks and falling back down.

# 3.15.2
- Fixed issues with preloading `SubChunk`.
- `/gc` and automatic garbage collection will now release unused heap blocks back to the OS. Previously, the PHP process might hold onto these blocks indefinitely even when not used, causing elevated real memory usage.
- Added some documentation to `FurnaceBurnEvent`.

# 3.15.3
- Fixed fall damage accumulation over continuous knockbacks (e.g. combo attacks in PvP).
- Fixed a bug in `Human->addXp()` that would cause a crash when saving player data.
- `Human->addXp()` will no longer modify the target's total XP if `PlayerExperienceChangeEvent` was cancelled.
- `AsyncPool->getTaskQueueSizes()` has been added to allow external detection of async pool overload. This is planned to be implemented as a core feature in the future, but it hasn't been done yet.
- `BaseInventory->canAddItem()` behaviour now matches `addItem()` by considering the max stack size of the given item.
- Fixed a bug in generator options handling for worlds loaded via `pocketmine.yml`. This fix has the following side effects:
  - It's now possible to provide generator options as an `options` key when loading a world via `pocketmine.yml`.
  - If generator options are not provided, the options from `server.properties` will be used, instead of using an empty preset. (It's not clear whether this is desired behaviour, but it was clearly intended, since there is code to do this which was broken until this release. As such, this behaviour is subject to change in the future.)
- Fixed a bug in region-based world loading where some files without filename extensions and names containing a region filename extension (e.g a file named `amca` in a McRegion world) would cause the world not to load. These files are now ignored.
- Default network compression level has been lowered to 6, due to level 7 being 25% more expensive for only a marginal improvement in bandwidth.
- Fixed a performance issue with chunk requesting when players trigger chunk generation on first join.
- Setup wizard will now always show IP information, even if the user chose to skip the setup wizard when prompted. (This doesn't affect `--no-wizard` in any way.)
- `Maximum memory (system)` is no longer reported in `/status` due to having a misleading output (it was the same as the current memory usage).
- The `Player Chunk Send` timer on timings reports now actually reports measurements of chunk sending, not chunk loading.
- A new parent timer `World Load` has been added to timings reports, which aggregates timings from `syncChunkLoad` and subtimings from all worlds.

# 3.15.4
- Fixed a bug in the inventory transaction system that caused the server to freeze under some circumstances.