From cb226719b349208513caaaca05399da238d102b9 Mon Sep 17 00:00:00 2001 From: William Blake Galbreath Date: Fri, 12 Jun 2020 16:15:12 -0500 Subject: [PATCH] PaperPR - Fix more exploits (carpet dupe, rail dupe, bedrock destroying, falling block (sand/dragon egg/etc) duping) --- src/main/java/net/minecraft/server/BlockPiston.java | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/src/main/java/net/minecraft/server/BlockPiston.java b/src/main/java/net/minecraft/server/BlockPiston.java index 9cca30a94f..3bd3a1fe84 100644 --- a/src/main/java/net/minecraft/server/BlockPiston.java +++ b/src/main/java/net/minecraft/server/BlockPiston.java @@ -373,11 +373,13 @@ public class BlockPiston extends BlockDirectional { } for (k = list.size() - 1; k >= 0; --k) { - blockposition3 = (BlockPosition) list.get(k); - iblockdata1 = world.getType(blockposition3); map.replace(blockposition3, iblockdata1); // Paper - fix piston physics inconsistency + BlockPosition oldPos = blockposition3 = (BlockPosition) list.get(k); // Purpur + iblockdata1 = null; // Purpur - explode if usage changes blockposition3 = blockposition3.shift(enumdirection1); map.remove(blockposition3); world.setTypeAndData(blockposition3, (IBlockData) Blocks.MOVING_PISTON.getBlockData().set(BlockPiston.FACING, enumdirection), 68); + iblockdata1 = world.getType(oldPos); map.replace(oldPos, iblockdata1); // Purpur - fix piston physics inconsistency - move after the physics update + world.setTypeAndData(oldPos, Blocks.AIR.getBlockData(), 68); // Purpur - set air to prevent later physics updates from seeing this block world.setTileEntity(blockposition3, BlockPistonMoving.a(iblockdata1, enumdirection, flag, false)); // Paper - fix piston physics inconsistency --j; aiblockdata[j] = iblockdata1; -- 2.26.2