v1.5.7/internal/terraform/testdata/refresh-module-computed-var/main.tf - terraform - Git at Google

 module "child" {
     source = "./child"
     value = "${join(" ", aws_instance.test.*.id)}"
 }

 resource "aws_instance" "test" {
     value = "yes"
 }
	module "child" {
	source = "./child"
	value = "${join(" ", aws_instance.test.*.id)}"
	}

	resource "aws_instance" "test" {
	value = "yes"
	}