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runtime(optwin): Fix E94 when searching for the option-window

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Problem:  When the parameter debug=msg is set and the command :option is
          entered, error E94 will be displayed.
Solution: Add a check for the existence of the buffer before getting the
          buffer number “option-window”.

Reproduce:

vim --clean -c "set debug=msg" -c "option"

    Error detected while processing command line..script D:\Programs\Vim\vim91\optwin.vim:
    line 9: E94: No matching buffer for option-window

closes: #17927

Signed-off-by: RestorerZ <restorer@mail2k.ru>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
RestorerZ
2025-08-08 12:37:06 +02:00
committed by Christian Brabandt
parent 1bfe86a7d3
commit 3be4ad76df
1 changed files with 2 additions and 2 deletions
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4
runtime/optwin.vim
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@@ -1,11 +1,11 @@
" These commands create the option window.
"
" Maintainer: The Vim Project <https://github.com/vim/vim>
" Last Change: 2025 Jul 25
" Last Change: 2025 Aug 07
" Former Maintainer: Bram Moolenaar <Bram@vim.org>
" If there already is an option window, jump to that one.
let buf = bufnr('option-window')
let buf = bufexists('option-window') ? bufnr('option-window') : -1
if buf >= 0
let winids = win_findbuf(buf)
if len(winids) > 0