patch 8.0.1671: crash when passing non-dict argument as env to job_start() commit https://github.com/vim/vim/commit/22efba47deb7e504142487fdc1617ec638cf0683 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Apr 7 13:22:21 2018 +0200 patch 8.0.1671: crash when passing non-dict argument as env to job_start() Problem: Crash when passing non-dict argument as env to job_start(). Solution: Check for valid argument. (Ozaki Kiichi, closes https://github.com/vim/vim/issues/2765)

#! /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