From 9536e09f1cbd585a5a5988b2b1118d14124b1c4c Mon Sep 17 00:00:00 2001
From: ChUrl <tobi@urpost.de>
Date: Sun, 31 Jan 2021 17:53:58 +0100
Subject: [PATCH] mini fix

---
 src/main/java/codegen/analysis/liveness/InterferenceNode.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/codegen/analysis/liveness/InterferenceNode.java b/src/main/java/codegen/analysis/liveness/InterferenceNode.java
index 12f1224..2e21072 100644
--- a/src/main/java/codegen/analysis/liveness/InterferenceNode.java
+++ b/src/main/java/codegen/analysis/liveness/InterferenceNode.java
@@ -1,5 +1,6 @@
 package codegen.analysis.liveness;
 
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.Objects;
 import java.util.Set;
@@ -49,7 +50,7 @@ public class InterferenceNode {
     }
 
     public Set<InterferenceNode> getNeighbourSet() {
-        return this.neighbours;
+        return Collections.unmodifiableSet(this.neighbours);
     }
 
     public boolean addNeighbour(InterferenceNode node) {