From a821ae02a84a6aa79d252c482d87f31e0f3a8c69 Mon Sep 17 00:00:00 2001
From: Adrian Siekierka <kontakt@asie.pl>
Date: Tue, 7 Jun 2022 16:16:21 +0200
Subject: [PATCH] add null check to GregTech data stick NBT, closes #3336

---
 .../li/cil/oc/integration/gregtech/ConverterDataStick.scala     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/scala/li/cil/oc/integration/gregtech/ConverterDataStick.scala b/src/main/scala/li/cil/oc/integration/gregtech/ConverterDataStick.scala
index a022ecc7b..430ffea73 100644
--- a/src/main/scala/li/cil/oc/integration/gregtech/ConverterDataStick.scala
+++ b/src/main/scala/li/cil/oc/integration/gregtech/ConverterDataStick.scala
@@ -14,7 +14,7 @@ class ConverterDataStick extends Converter {
   override def convert(value: Any, output: util.Map[AnyRef, AnyRef]): Unit = if (value.isInstanceOf[ItemStack]) {
     val stack = value.asInstanceOf[ItemStack]
     val nbt = stack.stackTagCompound
-    if (nbt.hasKey("prospection_tier"))
+    if (nbt != null && nbt.hasKey("prospection_tier"))
       nbt.getString("title") match {
         case "Raw Prospection Data" => getRawProspectionData(output, nbt)
         case "Analyzed Prospection Data" => {