From 1d624caf17dd3d571fd289c167b7fc713fbb3346 Mon Sep 17 00:00:00 2001
From: Dmck2b <suddenly@suddenly.coffee>
Date: Sun, 8 Mar 2015 03:45:49 -0500
Subject: [PATCH] Temporary fix for rails dupe


diff --git a/src/main/java/net/minecraft/server/BlockMinecartTrackAbstract.java b/src/main/java/net/minecraft/server/BlockMinecartTrackAbstract.java
index 0d108eb..3f34eac 100644
--- a/src/main/java/net/minecraft/server/BlockMinecartTrackAbstract.java
+++ b/src/main/java/net/minecraft/server/BlockMinecartTrackAbstract.java
@@ -88,8 +88,12 @@ public abstract class BlockMinecartTrackAbstract extends Block {
             }
 
             if (flag) {
-                this.b(world, blockposition, iblockdata, 0);
-                world.setAir(blockposition);
+                // PaperSpigot start - Rails dupe workaround
+                if (world.getType(blockposition).getBlock().getMaterial() != Material.AIR) {
+                    this.b(world, blockposition, iblockdata, 0);
+                    world.setAir(blockposition);
+                }
+                // PaperSpigot end
             } else {
                 this.b(world, blockposition, iblockdata, block);
             }
-- 
1.9.1