Vim status line leaked into scrollback

[dragonJACson]

Status line leaked into scrollback buffer

Issue description

The vim status line ("-- INSERT --") incorrectly appears within the terminal scrollback buffer instead of staying fixed at the bottom of the terminal window. (The line starts with 21888)

Environment

Issue reproducible on both environments, Ghostty itself runs on macOS 15.2

• Remote: Debian 10 with Vim (VIM - Vi IMproved 8.1 (2018 May 18, compiled Sep 27 2023 19:47:00)
• Local: macOS 15.2 with Vim (VIM - Vi IMproved 9.1 (2024 Jan 02, compiled Nov 9 2024 23:15:55)
• Vim configuration: Default settings, no customization
• Terminfo: xterm-256color
• Steps to reproduce
  • seq 1 100000 > numbers.txt
  • vim numbers.txt
  • Enter insert mode and keep scrolling
• Ghostty version: Version d0b06bd5, Build 8932
• Ghostty config:

font-family = Sarasa Term Slab SC
font-size = 16
theme = OneHalfDark

window-save-state = always
scrollback-limit = 10000000

Asciinema recording:
demo2.cast.zip

[dragonJACson]

Record.2025-01-09.12.49.36.mp4

For a clearer demonstration of the issue, you can view the screen recording where the status line leaking occurs at timestamp 00:26.