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Prevent NPE in CraftSign

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This commit prevents the constructor of CraftSign throwing an NPE when it cannot get the sign tile entity. Instead it will fallback to a 4 empty lined sign, and not try to do anything to those lines on .update().

@TheDgtl

By: md_5 <md_5@live.com.au>
This commit is contained in:
Spigot 2013-03-18 20:02:03 +11:00
parent 4baf879929
commit 5ade077442
1 changed files with 39 additions and 0 deletions
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39
CraftBukkit-Patches/0041-Prevent-NPE-in-CraftSign.patch Normal file
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@ -0,0 +1,39 @@
From 289f93ad3e999628f5d13a5da0fa2939cccbb5dd Mon Sep 17 00:00:00 2001
From: md_5 <md_5@live.com.au>
Date: Mon, 18 Mar 2013 20:01:44 +1100
Subject: [PATCH] Prevent NPE in CraftSign
This commit prevents the constructor of CraftSign throwing an NPE when it cannot get the sign tile entity. Instead it will fallback to a 4 empty lined sign, and not try to do anything to those lines on .update().
---
src/main/java/org/bukkit/craftbukkit/block/CraftSign.java | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java b/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
index 8e8a1c5..8b7d226 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
@@ -14,6 +14,12 @@ public class CraftSign extends CraftBlockState implements Sign {
CraftWorld world = (CraftWorld) block.getWorld();
sign = (TileEntitySign) world.getTileEntityAt(getX(), getY(), getZ());
+ // Spigot start
+ if (sign == null) {
+ lines = new String[4];
+ return;
+ }
+ // Spigot end
lines = new String[sign.lines.length];
System.arraycopy(sign.lines, 0, lines, 0, lines.length);
}
@@ -34,7 +40,7 @@ public class CraftSign extends CraftBlockState implements Sign {
public boolean update(boolean force) {
boolean result = super.update(force);
- if (result) {
+ if (result && sign != null) { // Spigot, add null check
for(int i = 0; i < 4; i++) {
if(lines[i] != null) {
sign.lines[i] = lines[i];
--
1.8.1-rc2