patch 8.2.4895: buffer overflow with invalid command with composing chars Commit: https://github.com/vim/vim/commit/d88934406c5375d88f8f1b65331c9f0cab68cc6c Author: Bram Moolenaar <Bram@vim.org> Date: Fri May 6 20:38:47 2022 +0100 patch 8.2.4895: buffer overflow with invalid command with composing chars Problem: Buffer overflow with invalid command with composing chars. Solution: Check that the whole character fits in the buffer.

Tests for complicated + argument to :edit command

STARTTEST
:$-1w! Xfile1
:$w! Xfile2
:edit +1|s/|/PIPE/|w Xfile1| e Xfile2|1 | s/\//SLASH/|w
:w! test.out
:e Xfile1
:w >> test.out
:qa!
ENDTEST

The result should be in Xfile1: "fooPIPEbar", in Xfile2: "fooSLASHbar"
foo|bar
foo/bar