From f133fcf66c049cada45f21088b00ce7d1444fd48 Mon Sep 17 00:00:00 2001
From: huanghongxun <huanghongxun2008@126.com>
Date: Fri, 8 Nov 2019 11:17:46 +0800
Subject: [PATCH] Fix NPE

---
 .../main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java
index 7263f1ec8..5e3be7495 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java
@@ -287,7 +287,8 @@ public class DefaultLauncher extends Launcher {
         Process process;
         try {
             ProcessBuilder builder = new ProcessBuilder(rawCommandLine).directory(runDirectory);
-            builder.environment().put("APPDATA", options.getGameDir().getAbsoluteFile().getParent());
+            String appdata = options.getGameDir().getAbsoluteFile().getParent();
+            if (appdata != null) builder.environment().put("APPDATA", appdata);
             process = builder.start();
         } catch (IOException e) {
             throw new ProcessCreationException(e);