// vtest vflags: -r
fn main() {
	mut a := ''
	a += 'foo'
	a += 'foo'
	a += 'foo'
	a += 'foo'
	a += 'foo'
	a += 'foo'
	a += 'foo'
	a += 'foo'
	a += 'foo'
	a += 'foo'
	a += 'foo'
}