papermc/Spigot-Server-Patches/0024-Prevent-tile-entity-and-entity-crashes.patch

From 61c65a8ab53663274d629a25df7e9adf64a61e4b 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/server/TileEntity.java b/src/main/java/net/minecraft/server/TileEntity.java
index da30d2cf86..acd9edd670 100644
--- a/src/main/java/net/minecraft/server/TileEntity.java
+++ b/src/main/java/net/minecraft/server/TileEntity.java
@@ -197,7 +197,12 @@ public abstract class TileEntity implements KeyedObject { // Paper
             return IRegistry.BLOCK_ENTITY_TYPE.getKey(this.q()) + " // " + this.getClass().getCanonicalName();
         });
         if (this.world != null) {
-            CrashReportSystemDetails.a(crashreportsystemdetails, this.position, this.getBlock());
+            // Paper start - Prevent TileEntity and Entity crashes
+            IBlockData block = this.getBlock();
+            if (block != null) {
+                CrashReportSystemDetails.a(crashreportsystemdetails, this.position, block);
+            }
+            // Paper end
             CrashReportSystemDetails.a(crashreportsystemdetails, this.position, this.world.getType(this.position));
         }
     }
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 119e011e2c..0afc34ac0e 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -675,11 +675,13 @@ public abstract class World implements IIBlockAccess, GeneratorAccess, AutoClose
                         ((ITickable) tileentity).tick();
                         gameprofilerfiller.exit();
                     } catch (Throwable throwable) {
-                        CrashReport crashreport = CrashReport.a(throwable, "Ticking block entity");
-                        CrashReportSystemDetails crashreportsystemdetails = crashreport.a("Block entity being ticked");
-
-                        tileentity.a(crashreportsystemdetails);
-                        throw new ReportedException(crashreport);
+                        // Paper start - Prevent tile entity and entity crashes
+                        System.err.println("TileEntity threw exception at " + tileentity.world.getWorld().getName() + ":" + tileentity.position.getX() + "," + tileentity.position.getY() + "," + tileentity.position.getZ());
+                        throwable.printStackTrace();
+                        tilesThisCycle--;
+                        this.tileEntityListTick.remove(tileTickPosition--);
+                        continue;
+                        // Paper end
                     }
                     // Spigot start
                     finally {
@@ -748,11 +750,12 @@ public abstract class World implements IIBlockAccess, GeneratorAccess, AutoClose
             // Spigot end
             consumer.accept(entity);
         } catch (Throwable throwable) {
-            CrashReport crashreport = CrashReport.a(throwable, "Ticking entity");
-            CrashReportSystemDetails crashreportsystemdetails = crashreport.a("Entity being ticked");
-
-            entity.appendEntityCrashDetails(crashreportsystemdetails);
-            throw new ReportedException(crashreport);
+            // Paper start - Prevent tile entity and entity crashes
+            System.err.println("Entity threw exception at " + entity.world.getWorld().getName() + ":" + entity.locX + "," + entity.locY + "," + entity.locZ);
+            throwable.printStackTrace();
+            entity.dead = true;
+            return;
+            // Paper end
         }
         // Spigot start
         finally {
-- 
2.21.0