package main

func foo(xs ...string) {
}

func main() {
	foo("hello", "world")
}

$ go build -gcflags '-m -l=3' x.go 
# command-line-arguments
./x.go:3: can inline foo
./x.go:6: can inline main
./x.go:7: inlining call to foo
./x.go:3: foo xs does not escape
./x.go:7: invalid operation [2]string literal[:] (slice of unaddressable value)
./x.go:7: cannot use autotmp_0 (type [2]string) as type []string in assignment

$ go version
go version go1.7.3 linux/amd64