サーバーの追加NIC定義を削除するとpanic発生

概要

サーバーの追加NICの定義を削除するとpanic発生

再現する最小手順

以下それぞれでterraform applyを実施

before

resource sakuracloud_server "foobar" {
    name = "foobar"
    additional_interfaces = [""]
}

after

resource sakuracloud_server "foobar" {
    name = "foobar"
}

期待する値

terraform applyが正常終了すること

実際の値

以下のログが出力される

`terraform apply`時のログ

``` panic: empty structure "additional_interfaces." has entry "additional_interfaces.0" goroutine 29 [running]: github.com/hashicorp/terraform/terraform.(*InstanceState).MergeDiff(0xc42036f400, 0xc4204052e0, 0x0) /private/tmp/terraform-20170331-56057-7aethk/terraform-0.9.2/src/github.com/hashicorp/terraform/terraform/state.go:1713 +0x5a8 github.com/hashicorp/terraform/terraform.(*EvalDiff).Eval(0xc4201cf770, 0x80b86c0, 0xc420154000, 0x2, 0x2, 0x58acfee, 0x4) /private/tmp/terraform-20170331-56057-7aethk/terraform-0.9.2/src/github.com/hashicorp/terraform/terraform/eval_diff.go:177 +0x481 github.com/hashicorp/terraform/terraform.EvalRaw(0x8085e80, 0xc4201cf770, 0x80b86c0, 0xc420154000, 0x550ac60, 0xc42036f400, 0x0, 0x0) /private/tmp/terraform-20170331-56057-7aethk/terraform-0.9.2/src/github.com/hashicorp/terraform/terraform/eval.go:53 +0x175 github.com/hashicorp/terraform/terraform.(*EvalSequence).Eval(0xc42042c980, 0x80b86c0, 0xc420154000, 0x2, 0x2, 0x58acfee, 0x4) /private/tmp/terraform-20170331-56057-7aethk/terraform-0.9.2/src/github.com/hashicorp/terraform/terraform/eval_sequence.go:14 +0xc1 github.com/hashicorp/terraform/terraform.EvalRaw(0x8086440, 0xc42042c980, 0x80b86c0, 0xc420154000, 0x4f25880, 0xc42043ac2c, 0x4c9a8a0, 0xc42043ad40) /private/tmp/terraform-20170331-56057-7aethk/terraform-0.9.2/src/github.com/hashicorp/terraform/terraform/eval.go:53 +0x175 github.com/hashicorp/terraform/terraform.Eval(0x8086440, 0xc42042c980, 0x80b86c0, 0xc420154000, 0xc42042c980, 0x8086440, 0xc42042c980, 0xc4204ba680) /private/tmp/terraform-20170331-56057-7aethk/terraform-0.9.2/src/github.com/hashicorp/terraform/terraform/eval.go:34 +0x4d github.com/hashicorp/terraform/terraform.(*Graph).walk.func1(0x56ea5a0, 0xc4201ca2b0, 0x0, 0x0) /private/tmp/terraform-20170331-56057-7aethk/terraform-0.9.2/src/github.com/hashicorp/terraform/terraform/graph.go:126 +0xd4d github.com/hashicorp/terraform/dag.(*Walker).walkVertex(0xc4203331f0, 0x56ea5a0, 0xc4201ca2b0, 0xc420100800) /private/tmp/terraform-20170331-56057-7aethk/terraform-0.9.2/src/github.com/hashicorp/terraform/dag/walk.go:387 +0x392 created by github.com/hashicorp/terraform/dag.(*Walker).Update /private/tmp/terraform-20170331-56057-7aethk/terraform-0.9.2/src/github.com/hashicorp/terraform/dag/walk.go:310 +0x9ca !!!!!!!!!!!!!!!!!!!!!!!!!!! TERRAFORM CRASH !!!!!!!!!!!!!!!!!!!!!!!!!!!! Terraform crashed! This is always indicative of a bug within Terraform. A crash log has been placed at "crash.log" relative to your current working directory. It would be immensely helpful if you could please report the crash with Terraform[1] so that we can fix this. When reporting bugs, please include your terraform version. That information is available on the first line of crash.log. You can also get it by running 'terraform --version' on the command line. [1]: https://github.com/hashicorp/terraform/issues !!!!!!!!!!!!!!!!!!!!!!!!!!! TERRAFORM CRASH !!!!!!!!!!!!!!!!!!!!!!!!!!!! ```

sacloud / terraform-provider-sakuracloud