From 3cf8fe8c41c61343fdec65c8223db0da163d8f52 Mon Sep 17 00:00:00 2001
From: Giles Atkinson <“gatk555@gmail.com”>
Date: Fri, 1 Dec 2023 12:06:24 +0000
Subject: [PATCH] Stop after last data point, preventing read overrun of
 nscale.

---
 src/maths/poly/interpolate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/maths/poly/interpolate.c b/src/maths/poly/interpolate.c
index a736aa15d..cbcd31bf8 100644
--- a/src/maths/poly/interpolate.c
+++ b/src/maths/poly/interpolate.c
@@ -133,7 +133,7 @@ ft_interpolate(double *data, double *ndata, double *oscale, int olen,
     /* Now plot the rest, piece by piece. l is the 
      * last element under consideration.
      */
-    for (++l; l < olen; l++) {
+    for (++l; l < olen && lastone < nlen - 1; l++) {
         double out;
 
         /* Shift the old stuff by one and get another value. */