From dc7b9314daf4a55f4bef976eff4106b01a68edc3 Mon Sep 17 00:00:00 2001
From: Tomas Slusny <slusnucky@gmail.com>
Date: Thu, 31 Jul 2025 17:37:31 +0200
Subject: [PATCH] fix: properly validate source window when retrieving cwd

Closes #1230

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>
---
 lua/CopilotChat/init.lua | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lua/CopilotChat/init.lua b/lua/CopilotChat/init.lua
index fa2e4308..d6dd3061 100644
--- a/lua/CopilotChat/init.lua
+++ b/lua/CopilotChat/init.lua
@@ -498,6 +498,9 @@ function M.set_source(source_winnr)
       bufnr = source_bufnr,
       winnr = source_winnr,
       cwd = function()
+        if not vim.api.nvim_win_is_valid(source_winnr) then
+          return '.'
+        end
         local dir = vim.w[source_winnr].cchat_cwd
         if not dir or dir == '' then
           return '.'