/usr/share/yash/completion/fc is in yash 2.35-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | # (C) 2010 magicant
# Completion script for the "fc" built-in command.
function completion/fc {
	typeset OPTIONS ARGOPT PREFIX
	OPTIONS=( #>#
	"e: --editor:; specify an editor to edit the command"
	"l --list; just print command history"
	"n --no-numbers; don't print history numbers in listing"
	"q --quiet; don't print the command before re-executing"
	"r --reverse; reverse the order of commands"
	"s --silent; re-execute the command without editing"
	"v --verbose; print history in detail (with -l)"
	"--help"
	) #<#
	command -f completion//parseoptions -es
	case $ARGOPT in
	(-)
		command -f completion//completeoptions
		;;
	(e|--editor)
		complete -P "$PREFIX" -c --normal-alias
		;;
	(*)
		typeset num cmd
		while read -r num cmd; do
			complete -D "$num" -- "$cmd"
		done <(fc -l 1)
		;;
	esac
}
# vim: set ft=sh ts=8 sts=8 sw=8 noet:
 |