From 9e46b3cd00ef0529b4bf4a7f9bba52aac499838d Mon Sep 17 00:00:00 2001
From: Felix Roos <roos@entrecode.de>
Date: Fri, 29 Apr 2022 21:14:37 +0200
Subject: [PATCH] fix: dont highlight out of range

---
 repl/src/CodeMirror6.jsx | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/repl/src/CodeMirror6.jsx b/repl/src/CodeMirror6.jsx
index c182b702..37a6a49e 100644
--- a/repl/src/CodeMirror6.jsx
+++ b/repl/src/CodeMirror6.jsx
@@ -26,8 +26,13 @@ const highlightField = StateField.define({
               .map(({ start, end }) => {
                 let from = tr.newDoc.line(start.line).from + start.column;
                 let to = tr.newDoc.line(end.line).from + end.column;
+                const l = tr.newDoc.length;
+                if (from > l || to > l) {
+                  return;
+                }
                 return highlightMark.range(from, to);
-              }),
+              })
+              .filter(Boolean),
             true,
           );
         }