From ca1d7ef863063993631dd77af7b0bdcf819273fc Mon Sep 17 00:00:00 2001
From: kerty <g.kabakov@inbox.ru>
Date: Sun, 30 Mar 2025 21:01:43 +0300
Subject: [PATCH] Fix residual lines after repaint with shrinking prompt

If you use `set t 10; function fish_prompt; seq $t; set t $(math $t - 1); end` and trigger a repaint, you will see 9 residual lines from the previous prompt.
---
 src/screen.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/screen.rs b/src/screen.rs
index 536cd1ca9..fb26d2c2d 100644
--- a/src/screen.rs
+++ b/src/screen.rs
@@ -549,6 +549,7 @@ pub fn reset_line(&mut self, repaint_prompt: bool /* = false */) {
                 .map_or(1, |p| calc_prompt_lines(p));
             self.actual.cursor.y += prompt_line_count.checked_sub(1).unwrap();
             self.actual_left_prompt = None;
+            self.need_clear_screen = true;
         }
         self.actual.resize(0);
         self.need_clear_lines = true;