The bug
Throwable projectiles such as snowballs, potions and enderpearls break when hitting blocks without collision boxes, unlike arrows.
Affected projectiles
Ender pearl
Snowball
Egg
Bottle of enchanting
Splash/lingering potions
Llama spit
How to reproduce
Throw for example a snowball at a double height plant.
Code analysis
Based on 1.11.2 decompiled using MCP 9.35 rc1
The method net.minecraft.entity.projectile.EntityThrowable.onUpdate() calls the method net.minecraft.world.World.rayTraceBlocks(Vec3d, Vec3d) which includes blocks without collision box. Instead the method World.rayTraceBlocks(Vec3d, Vec3d, boolean, boolean, boolean) should be called with false (stopOnLiquid), true (ignoreBlockWithoutBoundingBox) and false (returnLastUncollidableBlock).
Related issues
is duplicated by
MC-87983
ender pearl to stop in the grass
MC-94428
eggs, snowballs, splash potions, fishing rod float and ender pearls breaks on tripwire, opened fence gate and cobweb
MC-95945
Bobbers can't go through sugar canes.
MC-102749
Snowballs, Eggs, and Potions break when hitting tall grass and flowers
MC-106119
The snowballs will not pass through the grass
MC-118199
Witches and Tall Grass
MC-120249
Snow balls break by rails, instead of go through them
MC-126217
Eggs destroyed by Kelp and seagrass
MC-127771
Potions and Tripwires
MC-140230
Tripwire/string stopping snowballs and eggs though they're an entity
MC-144214
Potion bottle splash bug
MC-148597
Throwing entities (snowballs, eggs) collide with Tallgrass
MC-190186
Some projectiles can be blocked by passable blocks
MC-191849
Visual Glitch
MC-194667
Lingering Potions impact when hitting grass/tall grass-like entities
relates to
Comments
migrated
marcono1234
What do you mean by this, for which non-solid block couldn't you replicate it?
Sonicwave
Confirmed, but it has always been like this (haven't tested arrows and fishing rods yet though).
migrated
I misinterpreted the bug report. I am saying this is working as intended.
I tried throwing all the entities listed at non-solid blocks. I assumed the reporter meant transparent blocks since non-solid blocks would mean air and/or water which doesn't destroy any of these. I tried glowstone, pistons, and glass and the entities all get destroyed except for the arrow (which sticks in the block) and fishing bobber (which just sits there) as expected. Eggs, Fireballs, Snowballs, bottles o' enchanting, and splash potions have always been destroyed when hitting any block.
Unless I'm missing something this is working as intended.
Sonicwave
Non-solid blocks are blocks that do not impede player/mob movement, such as tall grass, flowers, tripwire, vines, torches etc.
migrated
Retested with non-solid blocks as defined by sonic and indeed the bug is confirmed for 1.8.1 pre-3. Only arrows are allowed through non-solid blocks.
migrated
I would assume it is an unintended side effect from an update (not sure how so many things go wrong even when it doesn't seem like they made any changes to the items/blocks that are effected).
could cause problems when trying to hide dispensers behind vines or tallgrass.
migrated
15w45a
migrated
Probably a dupe of MC-8017 anyway.
marcono1234
Seems that the fix was reverted, please reopen
Relates to MC-93636
Irbis
15w51b.
Also affected are ender pearls (as throwables) and opened fence gates (as nonsolid blocks).
Arrows are NOT affected.
Irbis
16w03a
migrated
confirmed in16w07a
it has exsited in former snapshots.
Irbis
1.9 pre 2
migrated
What is it with that? Confirmed? Fixed?
marcono1234
Probably confirmed, tested it with snowballs and tripwire and it is not fixed
Irbis
1.9 pre 4 is affected.
JUE13
Confirmed for 1.11, does not occur with a fishing rod
JUE13
Confirmed for 17w17b
JUE13
Confirmed for 1.12-pre7
Sonicwave
Confirmed for 1.12.2 and 18w03b
muzikbike
Affects 1.13-pre6
muzikbike
Affects 1.13-pre7
migrated
Confirmed for 1.13.1.
gaspoweredpick
Confirmed for 19w09a. The same thing applies to llama spit as well.
Irbis
20w06a affected
Humiebees
finally fixed in 1.16.2 pre 1
slicedlime
Can't replicate this issue.