From 20f3fb9d3eb544003f2cb007a44e11303cd753c8 Mon Sep 17 00:00:00 2001
From: Kirill Glazyrin <Kirill.Glazyrin@jetbrains.com>
Date: Wed, 4 Oct 2023 10:29:39 -0700
Subject: [PATCH] Fix RIDER-95155

(cherry picked from commit 189c475338c96181464467844e0353b6f818a97f)

NET-MR-12114

GitOrigin-RevId: 5e84b2932f323225cda89a17a26fc78d1eb11582
---
 .../intellij/openapi/editor/ex/util/LexerEditorHighlighter.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/platform/editor-ui-ex/src/com/intellij/openapi/editor/ex/util/LexerEditorHighlighter.java b/platform/editor-ui-ex/src/com/intellij/openapi/editor/ex/util/LexerEditorHighlighter.java
index 7c472933f7d7..7fb39d6f53fc 100644
--- a/platform/editor-ui-ex/src/com/intellij/openapi/editor/ex/util/LexerEditorHighlighter.java
+++ b/platform/editor-ui-ex/src/com/intellij/openapi/editor/ex/util/LexerEditorHighlighter.java
@@ -161,7 +161,7 @@ public class LexerEditorHighlighter implements EditorHighlighter, PrioritizedDoc
    */
   int incrementalUpdate(int eventOffset, int eventOldLength, int eventNewLength, @NotNull Document document) {
     CharSequence text = document.getImmutableCharSequence();
-    if (mySegments.getSegmentCount() == 0) {
+    if (mySegments.getSegmentCount() == 0 || mySegments.getLastValidOffset() < eventOffset) {
       setText(text);
       return text.length();
     }