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--- a/net/minecraft/server/TileEntityPiston.java +++ b/net/minecraft/server/TileEntityPiston.java @@ -104,6 +104,7 @@ } public void c() { + if (this.world == null) return; // CraftBukkit this.j = this.i; if (this.j >= 1.0F) { this.a(1.0F, 0.25F);