1 files changed, 8 insertions, 1 deletions
diff --git a/src/mind/topology.js b/src/mind/topology.js
index 9f2569d..946dd86 100644
--- a/src/mind/topology.js
+++ b/src/mind/topology.js
@@ -131,6 +131,13 @@ function get_value(n, index, input, prev, cache) {
 	const sum = values // compute the weighted sum of the values
 		.reduce((acc, x, i) => acc + (weight[i] * x), 0);
 
+	if (sum !== sum) { // NaN test
+	  console.log(n);
+    console.log(sources);
+    console.log(input);
+	  throw new Error(`failed to get output for index ${index}`);
+  }
+
 	// compute result
 	const value = Math.tanh(sum);
 
@@ -139,7 +146,7 @@ function get_value(n, index, input, prev, cache) {
 	if (cache !== undefined) {
 		cache[index] = value;
 	}
-	
+
 	return value;
 }