struct Foo {
	x int
}

fn main() {
	foo := 'foo is a string'
	a := {
		...foo // not a map
		'a': 5
		'b': 6
	}
	println(a)
	b := {
		...(a.clone()) // ok
		'c': 99
	}
	println(b)
	c := {
		...Foo{9} // also not ok
	}
	println(c)
}