Paper/patches/server/0026-Prevent-tile-entity-and-entity-crashes.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 1 Mar 2016 23:52:34 -0600
Subject: [PATCH] Prevent tile entity and entity crashes


diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index d29334b5dee6fe3f292f774442304b7dc6b0e2f0..d6ed061e36668ea1cbaee44c06575534336008fc 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -729,11 +729,11 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
         try {
             tickConsumer.accept(entity);
         } catch (Throwable throwable) {
-            CrashReport crashreport = CrashReport.forThrowable(throwable, "Ticking entity");
-            CrashReportCategory crashreportsystemdetails = crashreport.addCategory("Entity being ticked");
-
-            entity.fillCrashReportCategory(crashreportsystemdetails);
-            throw new ReportedException(crashreport);
+            // Paper start - Prevent tile entity and entity crashes
+            System.err.println("Entity threw exception at " + entity.level.getWorld().getName() + ":" + entity.getX() + "," + entity.getY() + "," + entity.getZ());
+            throwable.printStackTrace();
+            entity.discard();
+            // Paper end
         }
     }
 
diff --git a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
index 7b333e2d6884b272abefbc820bcce8026a4cdf7e..66ab4deedd177f507d170a61ceca4c3ebbac9adc 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
@@ -196,7 +196,12 @@ public abstract class BlockEntity implements net.minecraft.server.KeyedObject {
             return minecraftkey + " // " + this.getClass().getCanonicalName();
         });
         if (this.level != null) {
-            CrashReportCategory.populateBlockDetails(crashReportSection, this.level, this.worldPosition, this.getBlockState());
+            // Paper start - Prevent TileEntity and Entity crashes
+            BlockState block = this.getBlockState();
+            if (block != null) {
+                CrashReportCategory.populateBlockDetails(crashReportSection, this.level, this.worldPosition, block);
+            }
+            // Paper end
             CrashReportCategory.populateBlockDetails(crashReportSection, this.level, this.worldPosition, this.level.getBlockState(this.worldPosition));
         }
     }
diff --git a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
index 743aafec1f1c819846813688355dd90534dddb3e..21f613b8d7785b996866b5059f3cb1bc87533d2e 100644
--- a/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
+++ b/src/main/java/net/minecraft/world/level/chunk/LevelChunk.java
@@ -1241,11 +1241,11 @@ public class LevelChunk implements ChunkAccess {
 
                         gameprofilerfiller.pop();
                     } catch (Throwable throwable) {
-                        CrashReport crashreport = CrashReport.forThrowable(throwable, "Ticking block entity");
-                        CrashReportCategory crashreportsystemdetails = crashreport.addCategory("Block entity being ticked");
-
-                        this.blockEntity.fillCrashReportCategory(crashreportsystemdetails);
-                        throw new ReportedException(crashreport);
+                        // Paper start - Prevent tile entity and entity crashes
+                        System.err.println("TileEntity threw exception at " + LevelChunk.this.getLevel().getWorld().getName() + ":" + this.getPos().getX() + "," + this.getPos().getY() + "," + this.getPos().getZ());
+                        throwable.printStackTrace();
+                        LevelChunk.this.removeBlockEntity(this.getPos());
+                        // Paper end
                         // Spigot start
                     } finally {
                         this.blockEntity.tickTimer.stopTiming();