Packer HCL file demonstrating local variable reference issue

main.pkr.hcl

variable "test" {
  default = "default value"  # Remove this line to cause Packer to crash
}

locals {
  test = var.test
}

source "null" "null" {
  communicator = "none"
}

build {
  sources = ["source.null.null"]

  provisioner "shell-local" {
    command = "echo var.test=\"${var.test}\" local.test=\"${local.test}\""
  }
}