From ed1d3274a56dc4314d01ac2a10d0ec4016642b7c Mon Sep 17 00:00:00 2001
From: Evelyn Schneider <evelyn.eliz.schneider@gmail.com>
Date: Mon, 3 Nov 2025 19:16:52 -0500
Subject: [PATCH] Only modify guioptions if guioptions exists

---
 plugin/buftabline.vim | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/plugin/buftabline.vim b/plugin/buftabline.vim
index fccfd6d..413b3c4 100644
--- a/plugin/buftabline.vim
+++ b/plugin/buftabline.vim
@@ -58,6 +58,7 @@ endfunction
 let s:dirsep = fnamemodify(getcwd(),':p')[-1:]
 let s:centerbuf = winbufnr(0)
 let s:tablineat = has('tablineat')
+let s:guioptions = exists('+guioptions')
 let s:sid = s:SID() | delfunction s:SID
 function! buftabline#render()
 	let show_num = g:buftabline_numbers == 1
@@ -170,8 +171,12 @@ endfunction
 
 function! buftabline#update(zombie)
 	set tabline=
-	if tabpagenr('$') > 1 | set guioptions+=e showtabline=2 | return | endif
-	set guioptions-=e
+	if tabpagenr('$') > 1
+		if s:guioptions | set guioptions+=e | endif
+		set showtabline=2
+		return
+	endif
+	if s:guioptions | set guioptions-=e | endif
 	if 0 == g:buftabline_show
 		set showtabline=1
 		return