patch 8.2.0189: cd() with NULL argument crashes Commit: https://github.com/vim/vim/commit/7cc96923c44bbcc541cbd211b6308d87a965f0c3 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jan 31 22:41:38 2020 +0100 patch 8.2.0189: cd() with NULL argument crashes Problem: cd() with NULL argument crashes. Solution: Check for NULL. (Ken Takata, closes https://github.com/vim/vim/issues/5558)

#! /bin/sh
#
# which.sh -- find where an executable is located.  It's here because the
# "which" command is not supported everywhere.  Used by Makefile.

IFS=":"
for ac_dir in $PATH; do
	if test -f "$ac_dir/$1"; then
		echo "$ac_dir/$1"
		break
	fi
done