### Terraform Version ```shell v1.13.4 ``` ### Terraform Configuration Files Any plan file contains `ephemeral` resource ### Debug Output I have plan file that creates ephemeral resources and when I executed `terraform show -json planfile`, it crashed with the following error message: ```text !!!!!!!!!!!!!!!!!!!!!!!!!!! TERRAFORM CRASH !!!!!!!!!!!!!!!!!!!!!!!!!!!! Terraform crashed! This is always indicative of a bug within Terraform. Please report the crash with Terraform[1] so that we can fix this. When reporting bugs, please include your terraform version, the stack trace shown below, and any additional information which may help replicate the issue. [1]: https://github.com/hashicorp/terraform/issues !!!!!!!!!!!!!!!!!!!!!!!!!!! TERRAFORM CRASH !!!!!!!!!!!!!!!!!!!!!!!!!!!! panic: unsupported resource mode 69 goroutine 1 [running]: runtime/debug.Stack() runtime/debug/stack.go:26 +0x5e github.com/hashicorp/terraform/internal/logging.PanicHandler() github.com/hashicorp/terraform/internal/logging/panic.go:84 +0x16a panic({0x34fe320?, 0xc001e3b400?}) runtime/panic.go:792 +0x132 github.com/hashicorp/terraform/internal/command/jsonchecks.makeStaticObjectAddr({0x44a0468, 0xc0005d5440}) github.com/hashicorp/terraform/internal/command/jsonchecks/objects.go:33 +0x925 github.com/hashicorp/terraform/internal/command/jsonchecks.MarshalCheckStates(0xc000724218) github.com/hashicorp/terraform/internal/command/jsonchecks/checks.go:51 +0x267 github.com/hashicorp/terraform/internal/command/jsonplan.Marshal(0xc0008856c0, 0xc0007e64e0, 0xc0008f06c0, 0xc000b0dbd0) github.com/hashicorp/terraform/internal/command/jsonplan/plan.go:317 +0x45f github.com/hashicorp/terraform/internal/command/views.(*ShowJSON).Display(0xc000724020, 0x0?, 0x0?, 0xc002045988?, 0x0?, 0x1800000000000000?) github.com/hashicorp/terraform/internal/command/views/show.go:143 +0xfa github.com/hashicorp/terraform/internal/command.(*ShowCommand).Run(0xc000582700, {0xc000070160, 0x2, 0x2}) github.com/hashicorp/terraform/internal/command/show.go:86 +0x543 github.com/hashicorp/cli.(*CLI).Run(0xc0005d2280) github.com/hashicorp/cli@v1.1.7/cli.go:265 +0x4de main.realMain() github.com/hashicorp/terraform/main.go:339 +0x1deb main.main() github.com/hashicorp/terraform/main.go:64 +0x13 ``` I have checked the [source code](https://github.com/hashicorp/terraform/blob/b221cc00957adcd9642b2fd8cf285670405ca53b/internal/command/jsonchecks/objects.go#L26-L34): ```go ret["kind"] = "resource" switch addr.Resource.Mode { case addrs.ManagedResourceMode: ret["mode"] = "managed" case addrs.DataResourceMode: ret["mode"] = "data" default: panic(fmt.Sprintf("unsupported resource mode %#v", addr.Resource.Mode)) } ``` Looks like we need add logic for `ephemeral` block? ### Expected Behavior No panic ### Actual Behavior Panic, crashed ### Steps to Reproduce `terraform plan -out=file` to create a plan with `ephemeral` in your TF config, then `terraform show -json ` ### Additional Context _No response_ ### References _No response_ ### Generative AI / LLM assisted development? _No response_