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fix(ui): "resize -1" with cmdheight=0

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Problem:
Crash from:

    set cmdheight=0 redrawdebug=invalid
    resize -1

Solution:
Do not invalidate first `p_ch` `msg_grid` rows in `update_screen` when
scrolling the screen down after displaying a message, because they may
be used later for drawing cmdline.
Fixes #22154
This commit is contained in:
nwounkn
2023-09-24 23:15:33 +05:00
committed by zeertzjq
parent ee8948f073
commit e298c01cfb
2 changed files with 21 additions and 1 deletions
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20
test/functional/ui/cmdline_spec.lua
View File

@@ -1011,6 +1011,26 @@ describe('cmdheight=0', function()
screen:attach()
end)
it("with redrawdebug=invalid resize -1", function()
command("set redrawdebug=invalid cmdheight=0 noruler laststatus=0")
screen:expect{grid=[[
^ |
{1:~ }|
{1:~ }|
{1:~ }|
{1:~ }|
]]}
feed(":resize -1<CR>")
screen:expect{grid=[[
^ |
{1:~ }|
{1:~ }|
{1:~ }|
|
]]}
assert_alive()
end)
it("with cmdheight=1 noruler laststatus=2", function()
command("set cmdheight=1 noruler laststatus=2")
screen:expect{grid=[[