azurerm_lb with multiple IP configurations doesn't expose multiple private_ip_address outputs

[tevert]

Terraform Version

Terraform v0.11.0

• provider.azurerm v0.3.3

Affected Resource(s)

Please list the resources as a list, for example:

• azurerm_lb (frontend_ip_configuration)

Terraform Configuration Files

resource "azurerm_lb" "firewall_LB" {
  name                = "firewall-LB"
  location            = "${var.resource_location}"
  resource_group_name = "${var.resource_group}"

  frontend_ip_configuration {
    name                          = "PrivateFrontIP"
    private_ip_address_allocation = "Dynamic"
    subnet_id                     = "${azurerm_virtual_network.firewall_vnet.id}/subnets/${azurerm_subnet.firewall_untrust_subnet.name}"
  }

  frontend_ip_configuration {
    name                          = "PrivateBackIP"
    private_ip_address_allocation = "Dynamic"
    subnet_id                     = "${azurerm_virtual_network.firewall_vnet.id}/subnets/${azurerm_subnet.firewall_trust_subnet.name}"
  }
}

output "load_balancer_ip" {
    value = "${azurerm_lb.firewall_LB.private_ip_address[1]}"
}

Expected Behavior

Output should have been filled with the private IP of the second frontend_ip_configuration

Actual Behavior

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

* module.firewall.output.load_balancer_ip: At column 44, line 1: invalid index operation into non-indexable type: TypeString in:

${azurerm_lb.firewall_LB.private_ip_address[1]}

Important Factoids

Relevant code appears to be here: https://github.com/terraform-providers/terraform-provider-azurerm/blob/58ad2a32660d05291ca5569651c28c8a0c92bf81/azurerm/resource_arm_loadbalancer.go#L184

Instead of having a singular string output, can this instead be an array for however many IP configurations are present? Any particular reason why it was written this way initially, with a break? Is there a different way to access a particular IP configuration?

[ghost]

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