From 5eee633c97055fc8c7617f2914835f2860b92d9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mathias=20Fu=C3=9Fenegger?=
 <mfussenegger@users.noreply.github.com>
Date: Tue, 14 May 2024 19:38:22 +0200
Subject: [PATCH] fix(lsp): don't start additional client if attach failed
 (#28744)

If a client for a server was already running and lsp.start was called in
an unloaded buffer it started another client instead of bailing out.
---
 runtime/lua/vim/lsp.lua | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/runtime/lua/vim/lsp.lua b/runtime/lua/vim/lsp.lua
index 325c30ca38..e2af317823 100644
--- a/runtime/lua/vim/lsp.lua
+++ b/runtime/lua/vim/lsp.lua
@@ -251,6 +251,8 @@ function lsp.start(config, opts)
     if reuse_client(client, config) then
       if lsp.buf_attach_client(bufnr, client.id) then
         return client.id
+      else
+        return nil
       end
     end
   end