From c83fedf0bd0cb39ed4706113029b3e358f141707 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Wed, 8 Dec 2021 08:41:46 +0800
Subject: fix(terminal): return early if there are no invalid rows

Prevent on_lines emitting out-of-bounds line indexes.
---
 src/nvim/terminal.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src')

diff --git a/src/nvim/terminal.c b/src/nvim/terminal.c
index 83ade74db1..e7c2713e10 100644
--- a/src/nvim/terminal.c
+++ b/src/nvim/terminal.c
@@ -1508,6 +1508,13 @@ static void refresh_screen(Terminal *term, buf_T *buf)
   // Terminal height may have decreased before `invalid_end` reflects it.
   term->invalid_end = MIN(term->invalid_end, height);
 
+  // There are no invalid rows.
+  if (term->invalid_start >= term->invalid_end) {
+    term->invalid_start = INT_MAX;
+    term->invalid_end = -1;
+    return;
+  }
+
   for (int r = term->invalid_start, linenr = row_to_linenr(term, r);
        r < term->invalid_end; r++, linenr++) {
     fetch_row(term, r, width);
-- 
cgit