From 3e6db5b2ec6fc152f70246f58654d762527c9ef2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ph=E1=BA=A1m=20B=C3=ACnh=20An?=
 <111893501+brianhuster@users.noreply.github.com>
Date: Wed, 28 Jan 2026 06:19:38 +0700
Subject: [PATCH] fix(termdebug): use mark `:` to get prompt line in prompt
 buffer #37336

Problem:
- Nvim supports multi-line input in prompt buffer, so line(`$`) is not
  always the prompt line.

Solution:
- Use `line("':")` to get the prompt line.
---
 runtime/pack/dist/opt/termdebug/plugin/termdebug.vim | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
index 18b36f4e70..a57f58164b 100644
--- a/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
+++ b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
@@ -692,7 +692,9 @@ func s:GdbOutCallback(job_id, msgs, event)
 
   " Add the output above the current prompt.
   for line in lines
-    call append(line('$') - 1, line)
+    " Nvim supports multi-line input in prompt-buffer, so the prompt line is
+    " not always the last line.
+    call append(line("':") - 1, line)
   endfor
   if !empty(lines)
     set modified