shift-space produces escape sequence in terminal

Steps to reproduce

1. start macvim gui
2. enter :term<enter> to start terminal mode
3. enter od -c<enter> to start octal dump
4. enter -space followed by followed by -D to end input
5. observe output

% od -c
^[[32;2u
0000000 033   [   3   2   ;   2   u  \n
0000010

Expected behaviour

 I expect shift-space to produce a space character, 020

% od -t x1
 
0000000 20 0a
0000002

Version of Vim

VIM - Vi IMproved 8.2 (2019 Dec 12, compiled Sep 24 2021 14:13:28) Included patches: 1-3455

Environment

OS: MacOS 10.15.7 and 12.0.1
terminal: MacVim 8.2.3455
TERM: xterm
shell: GNU bash, version 5.1.12(1)-release (x86_64-apple-darwin21.1.0)

FWIW I tried a vanilla env without .bashrc .bash_profile and .vimrc with same result

Logs and stack traces

No response

首先，在 MacVim 的终端模式下使用 od -c 重现报告的序列，并在可用时使用列出的 macOS 和 Vim 版本。跟踪 Shift-Space 在哪里被转换为发出的转义序列，并验证终端实际接收到的是空格字符；重现输出提供完成检查。