When sitting in boats and boats with chest mobs legs penetrate the hull

Affects 16w07b.

Affects 1.9.4.

Fixed for players. Affects 18w20c

Possibly clones MC-6241

Affects 18w22b

Affects 18w22c

Affects 1.13-pre1

Affects 1.13-pre2.

Since villagers are completely anthropomorphic, shouldn't the fact that they don't adopt a sitting position like other mobs do be considered a bug in its own right?

Affects 1.13-pre3

Affects 1.13-pre4

Affects 1.13-pre5

Affects 1.13-pre6

Affects 1.13-pre7

Affects 18w30b

Please link this in the description of the report.

The following is based on a decompiled version of Minecraft 1.12 using MCP 940

The reasons for this is caused in the method net.minecraft.entity.item.EntityBoat.updatePassenger where the setposition for passengers is set, at first the posY float looks to not cause it.

float f1 = (float)((this.isDead ? 0.009999999776482582D : this.getMountedYOffset()) + passenger.getYOffset());

But once you go to the method getMountedYOffset() you can see why this happens,

public double getMountedYOffset()
{
return -0.1D;
}

what this does is return the value '-0.1D' which will set the entity 0.1 down therefore the entity goes through the boat.

Potential fix

Change the value to '0.0D' so it will return the value 0, which basicially means it will not change it's posY.

public double getMountedYOffset()
{
return 0.0D;
}

I'll attach two screenshots with the potential fix.

Hope this helps and explains this issue 🙂

Still in 1.14 pre-3, 1.14 pre-4 and 1.14 pre-5

Still in 1.14 Release

Still in 1.14.1 Release

Still in 1.14.2 Pre-Release 1 and 1.14.2 Pre-Release 2

Can confirm in 21w05b.

Can confirm in 21w07a.

Relates to MC-150016.

Can confirm in 21w13a.

Can confirm in 21w15a.

Can confirm in 21w17a.

Can confirm in 1.17.

Can confirm in 21w42a.