Can't 'count' new resources to be created

[ArturChe]

Terraform Version

Terraform v0.11.7

Terraform Configuration Files

resource "aws_cloudfront_distribution" "distribution" {
  count = "${length(var.cloudfront_distribution_count)}"
  ...
}

resource "aws_route53_record" "dns-record" {
  count   = "${length(aws_cloudfront_distribution.distribution.*.id)}"
  ...
}

Expected Behavior

Creates aws_route53_record as much as aws_cloudfront_distribution as created on previous step

Actual Behavior

Error: Error refreshing state: 1 error(s) occurred:

• module.cloudfront.aws_route53_record.dns-record: aws_route53_record.dns-record: value of 'count' cannot be computed

Steps to Reproduce

1. terraform init
2. terraform plan

Additional Context

Actually error ocurres at firs time only. If I'll create aws_route53_record with script below

resource "aws_route53_record" "dns-record" {
  count   = "${length(var.cloudfront_distribution_count)}"
  ...
}

and then I'll change the script back and it will works fine!

[jbardin]

Hi @ArturChe,

Sorry about the confusion, but the error is correct, you cannot use a yet to be computed value for count. We have an open issue here to improve the documentation around this: #17421

[ghost]

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