From 335dae788bde23d3c239934ab321a479cd836d20 Mon Sep 17 00:00:00 2001
From: Pascal Serrarens <pascal@passer.life>
Date: Tue, 28 Apr 2026 11:34:41 +0200
Subject: [PATCH] Fix deleting neuron without synapses

---
 Runtime/Scripts/Core/Neuron.cs | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/Runtime/Scripts/Core/Neuron.cs b/Runtime/Scripts/Core/Neuron.cs
index 934fb63..88fae5b 100644
--- a/Runtime/Scripts/Core/Neuron.cs
+++ b/Runtime/Scripts/Core/Neuron.cs
@@ -266,15 +266,19 @@ namespace NanoBrain {
         }
 
         public static void Delete(Nucleus nucleus) {
-            foreach (Synapse synapse in nucleus.synapses) {
-                if (synapse.neuron is Neuron synapse_nucleus) {
-                    if (synapse_nucleus.receivers.Count > 1) {
-                        // there is another nucleus feeding into this input nucleus
-                        synapse_nucleus.receivers.RemoveAll(r => r == nucleus);
-                    }
-                    else {
-                        // No other links, delete it.
-                        Neuron.Delete(synapse_nucleus);
+            if (nucleus == null)
+                return;
+            if (nucleus.synapses != null) {
+                foreach (Synapse synapse in nucleus.synapses) {
+                    if (synapse.neuron is Neuron synapse_nucleus) {
+                        if (synapse_nucleus.receivers.Count > 1) {
+                            // there is another nucleus feeding into this input nucleus
+                            synapse_nucleus.receivers.RemoveAll(r => r == nucleus);
+                        }
+                        else {
+                            // No other links, delete it.
+                            Neuron.Delete(synapse_nucleus);
+                        }
                     }
                 }
             }