From 7fa2d9fe66d6e00b1e95e1548517af667fb7a2cb Mon Sep 17 00:00:00 2001
From: Jiri Pittner <jiri@pittnerovi.com>
Date: Sat, 24 Oct 2026 04:39:23 +0200
Subject: [PATCH] fixed missing copyonwrite() in optimize.cc

---
 optimize.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/optimize.cc b/optimize.cc
index 3d63279..641d3cf 100644
--- a/optimize.cc
+++ b/optimize.cc
@@ -35,6 +35,7 @@ for(int i=0; i<n; ++i)
 if(grad)
 	{
 	if(grad->size()!=x.size()) laerror("grad size mismatch");
+	grad->copyonwrite(); //I forgot this initially
 	for(int k=0; k<n; ++k)
 		{
 		(*grad)[k] = (k+1)*x[k]*(2+0.4*x[k]*x[k]);