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@74
|~+0&#e0e0e08| @73
|~| @73
|~| @73
|~| @73
|~| @73
|~| @52|o+0#0000001#ffd7ff255|t|h|e|r| |t|a|b| @11
|~+0#0000000#e0e0e08| @52|a+0#0000001#ffd7ff255| |c+0#ff404010&|o|m@1|e|n|t| +0#0000001&|l|i|n|e| @6
|:+0#0000000#ffffff0| @52|t+0#0000001#ffd7ff255|h|i|s| |l|i|n|e| |w|i|l@1| |n|o|t| |f|i
| +0#0000000#ffffff0@53|t+0#0000001#ffd7ff255| |h|e|r|e| @14