From e58592f00a61fe05a238bc106cd108f8a57ad291 Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Mon, 19 Jun 2023 12:55:55 +1000
Subject: Fix highlighters being applied to empty display buffers

In some cases such as with folding we can end-up with regions
not having any atoms to highlight which can trigger a crash as
we assume display buffers not to be empty

Fixes #4926
---
 src/highlighters.cc | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src')

diff --git a/src/highlighters.cc b/src/highlighters.cc
index d2daa085..ee772469 100644
--- a/src/highlighters.cc
+++ b/src/highlighters.cc
@@ -1840,6 +1840,9 @@ struct ForwardHighlighterApplier
                 cur_atom = cur_line->begin();
         }
 
+        if (region_lines.empty())
+            return;
+
         region_display.compute_range();
         highlighter.highlight(context, region_display, {begin, end});
 
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