From 0aa0fa1b7854cd50c883547017a08c10b95462c5 Mon Sep 17 00:00:00 2001
From: huanghongxun <i@huangyuhui.net>
Date: Fri, 23 Apr 2021 01:01:51 +0800
Subject: [PATCH] chore: try to figure out why NPE thrown calling
 builder.start()

---
 .../main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java  | 4 ++++
 1 file changed, 4 insertions(+)

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 990c9fe61..2afcecbfd 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/launch/DefaultLauncher.java
@@ -301,6 +301,10 @@ public class DefaultLauncher extends Launcher {
         // To guarantee that when failed to generate launch command line, we will not call pre-launch command
         List<String> rawCommandLine = generateCommandLine(nativeFolder).asList();
 
+        if (rawCommandLine.stream().anyMatch(StringUtils::isBlank)) {
+            throw new IllegalStateException("Illegal command line " + rawCommandLine);
+        }
+
         decompressNatives(nativeFolder);
 
         File runDirectory = repository.getRunDirectory(version.getId());