var.subnets count inconsistent with data.google_compute_subnetwork.created_subnets

[Jeanno]

Steps to reproduce

1. terraform apply
2. terraform destroy or change the number of items in var.subnets
3. terraform apply again. This time it will fail

Error

Error will be something like this:

Error: Error in function call

  on .terraform/modules/vpc/terraform-google-modules-terraform-google-network-7810346/main.tf line 57, in data "google_compute_subnetwork" "created_subnets":
  57:   region     = element(google_compute_subnetwork.subnetwork.*.region, count.index)
    |----------------
    | count.index is 0
    | google_compute_subnetwork.subnetwork is empty tuple

Call to function "element" failed: cannot use element function with an empty
list.

Related issues

#99 Cannot create VPC with only one subnet

[aaron-lane]

Fixed by #86.