From 7108bbcc11b08aaf896c99d8cda28907841db236 Mon Sep 17 00:00:00 2001
From: Russell Standish <hpcoder@hpcoders.com.au>
Date: Thu, 9 May 2024 18:00:17 +1000
Subject: [PATCH] Fix out of bounds error.

---
 src/plot.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/plot.cc b/src/plot.cc
index 361375a..4236074 100644
--- a/src/plot.cc
+++ b/src/plot.cc
@@ -1334,7 +1334,7 @@ namespace ecolab
               {
                 xp=x[pen][i];
                 yp=y[pen][i];
-                penLabel=penTextLabel[pen];
+                penLabel=pen<penTextLabel.size()? penTextLabel[pen]: "";
                 mousePen=pen;
                 mind=d;
               }