v1.5.7/internal/terraform/testdata/data-source-read-with-plan-error/main.tf

resource "aws_instance" "foo" {
}

// this will be postponed until apply
data "aws_data_source" "foo" {
  foo = aws_instance.foo.id
}

// this will cause an error in the final plan
resource "test_instance" "bar" {
  foo = "error"
}