Cannot use a tuple value in for_each. An iterable collection is required.

[cilindrox]

Upgrading from terraform 0.14.10 to 0.15.0 - plan is now raising a bunch of errors for dynamic blocks using for_each loops:

locals {
  admin_users = ["foo", "bar"]
}

  dynamic "iam_identity_mapping" {
    for_each = [for a in local.admin_users : {
      iamarn   = "arn:aws:iam::123456:user/${a}"
      username = a
      groups = [
        "baz",
        "quux",
      ]
    }]
  }

on tf 0.15 the block above fails with Cannot use a tuple value in for_each. An iterable collection is required.

I'm somewhat lost, since I didn't see any specific references to this on the release notes or migration steps, could this be related to the provider implementation?

[cilindrox]

Closing this - narrowed it down to a value this depended on being flagged as sensitive: hashicorp/terraform-provider-aws#9090 (comment)

Seems the aws_ssm_parameter resource applies the sensitive to every data source.

[github-actions]

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