patch 8.2.3476: renaming a buffer on startup may cause using freed memory Commit: https://github.com/vim/vim/commit/d3710cf01ef6ab1b2f233866ff01dab76686f642 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Oct 4 23:13:13 2021 +0100 patch 8.2.3476: renaming a buffer on startup may cause using freed memory Problem: Renaming a buffer on startup may cause using freed memory. Solution: Check if the buffer is used in a window. (closes https://github.com/vim/vim/issues/8955)

> +0&#ffffff0@49
|~+0#4040ff13&| @48
|++3#0000000&|n|+| @46
| +0&&@49
|~+0#4040ff13&| @48
|-+1#0000000&|n|-| @46
| +0&&@49