Player is able to horizontally clip through block with boat in a minecart

Players can easily clip through blocks (including bedrock, barriers, etc.) horizontally using a boat, a minecart, and a few rails.

1. Place a boat on a rail that is 3-4 blocks long, ending on an otherwise impassable wall
2. Place a minecart on the other end of the rail and push it so that the boat will be put into the minecart, and make sure the minecart drives up to the wall
3. Break the minecart
4. Enter the boat that is now partially inside the block, meaning you can pass right through it

See the attached video