From 12eb09f0b99028b683b28d570bc84c15b1fbd11d Mon Sep 17 00:00:00 2001
From: Martino Facchin <m.facchin@arduino.cc>
Date: Thu, 27 Oct 2016 09:52:40 +0200
Subject: [PATCH] Fix NPE if referred core is nonexistent

Fixes #5502
---
 arduino-core/src/processing/app/BaseNoGui.java | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arduino-core/src/processing/app/BaseNoGui.java b/arduino-core/src/processing/app/BaseNoGui.java
index 482daa863..64a8313b5 100644
--- a/arduino-core/src/processing/app/BaseNoGui.java
+++ b/arduino-core/src/processing/app/BaseNoGui.java
@@ -162,12 +162,14 @@ public class BaseNoGui {
 
     // Add all tools dependencies from the (possibily) referenced core
     String core = prefs.get("build.core");
-    if (core.contains(":")) {
+    if (core != null && core.contains(":")) {
       String split[] = core.split(":");
       TargetPlatform referenced = BaseNoGui.getCurrentTargetPlatformFromPackage(split[0]);
-      ContributedPlatform referencedPlatform = indexer.getContributedPlaform(referenced);
-      if (referencedPlatform != null)
-        requiredTools.addAll(referencedPlatform.getResolvedTools());
+      if (referenced != null) {
+        ContributedPlatform referencedPlatform = indexer.getContributedPlaform(referenced);
+        if (referencedPlatform != null)
+          requiredTools.addAll(referencedPlatform.getResolvedTools());
+      }
     }
 
     String prefix = "runtime.tools.";