Bug
- [MC-48666] - Cobwebs are affected by block lighting in full sky lighting
- [MC-52166] - Lowering height by one block causes fall damage even with water brake
- [MC-103516] - Spider and chicken jockeys only spawn the additional mob
- [MC-118372] - Faulty netty-4.1.9.Final release causes players to be kicked from the server
- [MC-119901] - Slow scrolling in controls menu
- [MC-122311] - Game crashes after "Backup and Load"
- [MC-122473] - Game crashes when resourcepack selected (path of location: minecraft:blocks/stone frame)
- [MC-124027] - Default singleplayer player data is not written or read to level.dat anymore
- [MC-124167] - Disabled datapacks still override vanilla structures (e.g. igloo)
- [MC-124545] - Malformed JSON as 'name' value for 'show_entity' hoverEvent causes crash
- [MC-124546] - /datapack disable <pack> only works in the overworld
- [MC-124970] - Selector argument values beginning with "!" show an error despite them being a valid prefix
- [MC-124990] - Inverted tab-suggestions for argument values in entity selectors do not display gray text in chat input line
- [MC-125038] - New world generation doesn't populate edges of old world
- [MC-125729] - Moving frosted ice preempts melting even under correct conditions
- [MC-125807] - Block ids are inserted wrongly into chunk section block palettes
- [MC-125900] - Sky light levels underground too high (since 18w05a)
- [MC-126081] - Mousepointer is not captured
- [MC-126136] - Inverted tab-suggestions for argument values in entity selectors are suggested even if the typed prefix doesn't include an exclamation mark
- [MC-126144] - Cods suffocate when touching a solid block from below
- [MC-126373] - Density of nether and overworld ore veins significantly lower in 18w versions
- [MC-126508] - Crash: Exception in thread "main" java.lang.UnsatisfiedLinkError: Failed to dynamically load library
- [MC-126569] - Underwater Ruins Floating in the water
- [MC-126599] - Failed to save chunk java.lang.NullPointerException: null
- [MC-126723] - Some mobs presenting a swimming state in the wrong place
- [MC-126906] - Buckets cannot be emptied against blocks with the state waterlogged
- [MC-126915] - Dispenser with empty bucket removes waterlogged blocks instead of drying them out.
- [MC-126964] - Fish mobs, guardians and dolphins cannot properly swim in the waterlogged blocks
- [MC-127017] - Coral Plants don't break if the block underneath them is removed
- [MC-127334] - Superflat biome id still uses numeral id, rather than named id
- [MC-127803] - Falling down with elytra active and looking upwards the player falls through the world
- [MC-129527] - Drowned overlay turns dark blue when wearing enchanted armor
- [MC-130182] - Can't open world from 1.12
- [MC-130270] - Iron golem spawning inside blocks
- [MC-130480] - Input range entry and limits are reversed in error messages
- [MC-130547] - Objective minecraft.used only ticks up when placing a block from a stack of 2 or more items
- [MC-130887] - Crash with cartographers: Loading entity NBT
- [MC-131088] - Corrupted chunk in the middle of an already generated oceanmonument after updating from 18w16a to 1.13-pre1
- [MC-131094] - Projectiles ignore collisions for ~1 block after spawned
- [MC-131239] - Stained glass, iron bars and brewing stands show up on maps even when there is no block beneath it
- [MC-131409] - Reins appear while riding non-saddled horses
- [MC-131599] - Opening player inventory with visible recipe book after using beacon causes crash
- [MC-131739] - Data generators sometimes hang forever (and always wait to exit after finishing) due to data fixers
- [MC-131857] - Dragon Death Effects Keep Going
- [MC-132002] - Ender dragon respawns when upgrading from 1.12 to 1.13-pre3
- [MC-132064] - Swimming state does not end when teleporting / jumping out of water
- [MC-132073] - Creating a new world fails "Writing into PalettedContainer from multiple threads" - Bug in JRE 1.8.0_25
- [MC-132139] - 1.13-pre4 crash: Failed to locate library: lwjgl_opengl32.dll
- [MC-132144] - Using bone meal on bottom log of tree grown from sapling consumes bone meal
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