assign_block_to_attr.river

rw = prometheus/* ERROR "cannot use a block as an expression" */.remote_write "default" {
  endpoint {
    url = "some_url"
	basic_auth {
      username = "username"
      password = "password"
    }
  }
}

attr_1 = 15
attr_2 = 51

block {
	rw_2 = prometheus/* ERROR "cannot use a block as an expression" */.remote_write "other" {
		endpoint {
			url = "other_url"
			basic_auth {
				username = "username_2"
				password = "password_2"
			}
		}
	}
}

other_block {
	// This is an expression which looks like it might be a block at first, but
	// then isn't.
	rw_3 = prometheus.remote_write "other" "other" /* ERROR "expected {, got STRING" */ 12345
}

attr_3 = 15