terraform-provider-azurerm: Segfault in `terraform plan` possibly related to azurerm_app_service_managed_certificate

Community Note

• Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request
• Please do not leave “+1” or “me too” comments, they generate extra noise for issue followers and do not help prioritize the request
• If you are interested in working on this issue or have submitted a pull request, please leave a comment

Terraform (and AzureRM Provider) Version

Terraform v1.0.6
on linux_amd64
+ provider registry.terraform.io/hashicorp/azurerm v2.41.0

Affected Resource(s)

• azurerm_app_service_managed_certificate

Terraform Configuration Files

See: https://github.com/WorldWideTelescope/wwt-terraform-infra/tree/master/website

Debug Output

edit: log deleted since I’m worried it might contain secrets and AFAICT it is not at all necessary to solving this issue

Panic Output

No crash.log since the plugin panicked, not terraform itself:

Stack trace from the terraform-provider-azurerm_v2.41.0_x5 plugin:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x4602981]

goroutine 1345 [running]:
github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/services/web.resourceArmAppServiceManagedCertificateRead(0xc0024839d0, 0x49ab0c0, 0xc000346600, 0x0, 0x0)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/services/web/app_service_managed_certificate_resource.go:223 +0x681
github.com/hashicorp/terraform-plugin-sdk/helper/schema.(*Resource).RefreshWithoutUpgrade(0xc001049a70, 0xc00163cff0, 0x49ab0c0, 0xc000346600, 0xc00182aa20, 0x0, 0x0)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform-plugin-sdk/helper/schema/resource.go:460 +0x129
github.com/hashicorp/terraform-plugin-sdk/internal/helper/plugin.(*GRPCProviderServer).ReadResource(0xc000296de8, 0x56fdcc0, 0xc0012cadb0, 0xc0022e7800, 0xc000296de8, 0xc0012cadb0, 0xc00216fb78)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform-plugin-sdk/internal/helper/plugin/grpc_provider.go:525 +0x3dd
github.com/hashicorp/terraform-plugin-sdk/internal/tfplugin5._Provider_ReadResource_Handler(0x4dfb920, 0xc000296de8, 0x56fdcc0, 0xc0012cadb0, 0xc0022e77a0, 0x0, 0x56fdcc0, 0xc0012cadb0, 0xc00124a000, 0x37d)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform-plugin-sdk/internal/tfplugin5/tfplugin5.pb.go:3269 +0x214
google.golang.org/grpc.(*Server).processUnaryRPC(0xc00028bc80, 0x5742540, 0xc000001e00, 0xc0016cb400, 0xc000923500, 0x84cddf0, 0x0, 0x0, 0x0)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/google.golang.org/grpc/server.go:1024 +0x522
google.golang.org/grpc.(*Server).handleStream(0xc00028bc80, 0x5742540, 0xc000001e00, 0xc0016cb400, 0x0)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/google.golang.org/grpc/server.go:1313 +0xd34
google.golang.org/grpc.(*Server).serveStreams.func1.1(0xc000c84160, 0xc00028bc80, 0x5742540, 0xc000001e00, 0xc0016cb400)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/google.golang.org/grpc/server.go:722 +0xa5
created by google.golang.org/grpc.(*Server).serveStreams.func1
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/google.golang.org/grpc/server.go:720 +0xa5

Error: The terraform-provider-azurerm_v2.41.0_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.

Expected Behaviour

Not crash.

Actual Behaviour

Crash.

Steps to Reproduce

1. terraform plan -var-file=prod.tfvars

Important Factoids

I haven’t used this project’s Terraform tooling for a while, so the definition files may be quite out of date.

References