Terraform fails to interpolate a value with splat syntax

[yehorov]

Terraform Version

Terraform v0.11.1
+ provider.null v1.0.0

Terraform Configuration Files

main.tf

variable "role_level" { default = "vpc" }

resource "null_resource" "role" {
  count = "${var.role_level == "env" ? 1 : 0 }"
}

output "name" {
  value = "${join("", null_resource.role.*.id)}"
}

terraform.tfvars

role_level = "env"

Expected Behavior

I expect that after changing of a variable's value in terraform.tfvars all resources will be destroyed and the new value will be interpolated immediately.

Actual Behavior

If existed resources are deleted, terraform fails to interpolate value with splat syntax. But on the next invocations it run without any errors.

$ terraform apply -auto-approve
null_resource.role: Creating...
null_resource.role: Creation complete after 0s (ID: 4916734105907799574)

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.

Outputs:

name = 4916734105907799574

$ terraform apply -auto-approve
null_resource.role: Refreshing state... (ID: 4916734105907799574)
null_resource.role: Destroying... (ID: 4916734105907799574)
null_resource.role: Destruction complete after 0s

Error: Error applying plan:

1 error(s) occurred:

* output.name: Resource 'null_resource.role' does not have attribute 'id' for variable 'null_resource.role.*.id'

Terraform does not automatically rollback in the face of errors.
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.

$ terraform apply -auto-approve

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

name =

Steps to Reproduce

1. terraform init
2. terraform apply
3. Delete the terraform.tfvars file
4. terraform apply
5. terraform apply

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.