[vim/vim] gVim: info popup flashes with completeopt=popuphidden when shortmess+=c (Issue #18442)

[Ruben Gonzalez]

gonzaru created an issue (vim/vim#18442)

Steps to reproduce

1. $ vim --clean
2. : source the file (gvim-popup.vim.txt)
3. insert mode to launch complete func (C-x_C-u)
4. navigate with or

vim9script

def MyComplete(findstart: number, base: string): any
if findstart
return col('.') - 1 - match(getline('.')->strpart(0, col('.') - 1), '\k*$')
endif
return [
{word: 'printf', info: 'printf info'},
{word: 'printer', info: 'printer info'},
{word: 'printable', info: 'printable info'},
]
enddef

set completefunc=MyComplete

set completeopt=menuone,noselect,popup

set completeopt=menuone,noselect,popuphidden

set shortmess+=c

gvim-popup.vim.txt

Expected behaviour

Hello,

The popup should remain hidden at all times unless explicitly shown by the user (e.g., via popup_show()).

Without shortmess+=c, the popup stays hidden as expected.

With shortmess+=c, the info popup momentarily appears and then vanishes during completion navigation.

Thank you!

Version of Vim

9.1.1806 (GTK3 GUI)

Environment

GNU/Linux
GTK3

Logs and stack traces

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[Christian Brabandt]

chrisbra left a comment (vim/vim#18442)

is this by any chance fixed by 71b97f2 ?

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[Ruben Gonzalez]

gonzaru left a comment (vim/vim#18442)

Hello,

Same with 9.1.1813

I noticed this behavior some time ago but didn’t report it because I was using a workaround: temporarily toggling shortmess+=c off and back on around the action (i.e., :set shortmess-=c before and :set shortmess+=c after).

The issue appears only in gVim when shortmess+=c is set.
In terminal Vim, the behavior is correct both with and without shortmess+=c—no flash occurs.

Regards,

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