panic with empty cdrom{} block

[bjh21]

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Terraform

1.10.5

Terraform Provider

2.11.1

VMware vSphere

8.0.3.00400

Description

I provisioned a VM from an OVA in a Content Library (specifically, a copy of https://cloud-images.ubuntu.com/releases/24.04/release-20250115/ubuntu-24.04-server-cloudimg-amd64.ova) and then found that it needed a CD-ROM driver ("Error: this virtual machine requires a client CDROM device to deliver vApp properties"). So I added this to the VM's resource block:

  cdrom {
  }

Running terraform plan then caused a panic.

Affected Resources or Data Sources

resource/vsphere_virtual_machine

Terraform Configuration

https://gist.github.com/bjh21/faa3a0d90282ca34c30b7f02f14a7728

Debug Output

The phrase "debug output" doesn't return anything useful when searching the Terraform docs, so I don't know what's required here.

Panic Output

The phrase "crash.log" doesn't return anything when searching the Terraform docs, so I don't know where to find the crash.log file.

Expected Behavior

I expected a polite error message telling me that a completely empty cdrom block wasn't allowed.

Actual Behavior

Running terraform plan caused a panic:

Planning failed. Terraform encountered an error while generating this plan.

╷
│ Error: Request cancelled
│
│   with vsphere_virtual_machine.moa-dev-patroni4,
│   on main.tf line 58, in resource "vsphere_virtual_machine" "moa-dev-patroni4":
│   58: resource "vsphere_virtual_machine" "moa-dev-patroni4" {
│
│ The plugin.(*GRPCProvider).PlanResourceChange request was cancelled.
╵

Stack trace from the terraform-provider-vsphere_v2.2.0_x5 plugin:

panic: interface conversion: interface {} is nil, not map[string]interface {}

goroutine 223 [running]:
github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/virtualdevice.VerifyVAppTransport(0x1008640?)
        github.com/hashicorp/terraform-provider-vsphere/vsphere/internal/virtualdevice/virtual_machine_cdrom_subresource.go:599 +0x21d
github.com/hashicorp/terraform-provider-vsphere/vsphere.resourceVSphereVirtualMachineCustomizeDiff({0x14c5a20?, 0xc0007c8300?}, 0xc000783300, {0x103c1c0?, 0xc0006a44e0})
        github.com/hashicorp/terraform-provider-vsphere/vsphere/resource_vsphere_virtual_machine.go:1027 +0xd05
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.schemaMap.Diff(0xc000283a40, {0x14c5a20, 0xc0007c8300}, 0xc0008b40d0, 0xc00081b740, 0x1371c20, {0x103c1c0, 0xc0006a44e0}, 0x0)
        github.com/hashicorp/terraform-plugin-sdk/v2@v2.17.0/helper/schema/schema.go:677 +0x4b4
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).SimpleDiff(0x14c6190?, {0x14c5a20?, 0xc0007c8300?}, 0xc0008b40d0, 0x106e9c0?, {0x103c1c0?, 0xc0006a44e0?})
        github.com/hashicorp/terraform-plugin-sdk/v2@v2.17.0/helper/schema/resource.go:890 +0x6c
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*GRPCProviderServer).PlanResourceChange(0xc000127920, {0x14c5978?, 0xc0009f2000?}, 0xc00009c0f0)
        github.com/hashicorp/terraform-plugin-sdk/v2@v2.17.0/helper/schema/grpc_provider.go:741 +0x98c
github.com/hashicorp/terraform-plugin-go/tfprotov5/tf5server.(*server).PlanResourceChange(0xc000510460, {0x14c5a20?, 0xc000bd3740?}, 0xc0000d6460)
        github.com/hashicorp/terraform-plugin-go@v0.9.1/tfprotov5/tf5server/server.go:779 +0x515
github.com/hashicorp/terraform-plugin-go/tfprotov5/internal/tfplugin5._Provider_PlanResourceChange_Handler({0x128f8e0?, 0xc000510460}, {0x14c5a20, 0xc000bd3740}, 0xc000747e60, 0x0)
        github.com/hashicorp/terraform-plugin-go@v0.9.1/tfprotov5/internal/tfplugin5/tfplugin5_grpc.pb.go:367 +0x170
google.golang.org/grpc.(*Server).processUnaryRPC(0xc000140700, {0x14c8650, 0xc0006029c0}, 0xc0000c5b00, 0xc000274bd0, 0x1d662c8, 0x0)
        google.golang.org/grpc@v1.46.0/server.go:1283 +0xcfd
google.golang.org/grpc.(*Server).handleStream(0xc000140700, {0x14c8650, 0xc0006029c0}, 0xc0000c5b00, 0x0)
        google.golang.org/grpc@v1.46.0/server.go:1620 +0xa1b
google.golang.org/grpc.(*Server).serveStreams.func1.2()
        google.golang.org/grpc@v1.46.0/server.go:922 +0x98
created by google.golang.org/grpc.(*Server).serveStreams.func1
        google.golang.org/grpc@v1.46.0/server.go:920 +0x28a

Error: The terraform-provider-vsphere_v2.2.0_x5 plugin crashed!

This is always indicative of a bug within the plugin. It would be immensely
helpful if you could report the crash with the plugin's maintainers so that it
can be fixed. The output above should help diagnose the issue.

Steps to Reproduce

Unknown. Maybe if you've got a vSphere environment and a configuration similar to the one above, you can reproduce the problem.

Environment Details

No response

Screenshots

No response

References

No response

[github-actions]

Hello, bjh21! 🖐

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