Problem with module and splat variables

[lamdor]

As I commented on #408, however, I think the problem is more specific to using a module that refers to internal resources with a splat variable.

If I have a base/main.tf file with

variable "instance_count" {
  default = "1"
}

resource "aws_instance" "base" {
  ami = "ami-b66ed3de"
  instance_type = "m3.medium"

  count = "${var.instance_count}"

  connection {
    type = "ssh"
    host = "${aws_instance.base.private_ip}"
  }
}

resource "aws_route53_record" "base_internal_dns" {
  name = "${concat("test", count.index, ".", "test.com")}"

  count = "${var.instance_count}"

  zone_id = "test.com"
  type = "A"
  ttl = "1"
  records = ["${element(aws_instance.base.*.private_ip, count.index)}"]
}

And another configuration that uses it as a module like:

issue.tf:

module "base" {
  source = "./base"
  instance_count = "2"
}

And then run terraform plan --module-depth=1 from the issue.tf file location, I get:
Error running plan: Resource 'aws_instance.base' not found for variable 'aws_instance.base.*.private_ip'

The aws_route53_record.base_internal_dns resource refers to the aws_instance.base on the records line.

However, if I run from inside of the module at the base/ directory, I runs correctly.

If I change that line to just records = ["${aws_instance.base.*.private_ip}"], it gets the error.

If it's changed to records = ["${aws_instance.base.0.private_ip}"], it does plan, even though it's going to just use the first instance's information.

Any ideas? Thanks.