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

[tomwilkie]

I get this error when I try and apply this config:

resource "google_compute_backend_service" "backend_service" {
  ...
  iap {
    oauth2_client_id     = ""
    oauth2_client_secret = ""
  }
}

Version terraform-provider-google_v1.7.0_x4

panic: interface conversion: interface {} is nil, not map[string]interface {}
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: goroutine 251 [running]:
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: github.com/terraform-providers/terraform-provider-google/google.expandIap(...)
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/opt/teamcity-agent/work/222ea50a1b4f75f4/src/github.com/terraform-providers/terraform-provider-google/google/resource_compute_backend_service.go:300
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: github.com/terraform-providers/terraform-provider-google/google.expandBackendService(0xc42035c230, 0xc420570920, 0x1000010644e5, 0x58)
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/opt/teamcity-agent/work/222ea50a1b4f75f4/src/github.com/terraform-providers/terraform-provider-google/google/resource_compute_backend_service.go:415 +0xce3
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: github.com/terraform-providers/terraform-provider-google/google.resourceComputeBackendServiceCreate(0xc42035c230, 0x216ec60, 0xc4201a2b40, 0xc42035c230, 0x0)
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/opt/teamcity-agent/work/222ea50a1b4f75f4/src/github.com/terraform-providers/terraform-provider-google/google/resource_compute_backend_service.go:179 +0x58
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: github.com/terraform-providers/terraform-provider-google/vendor/github.com/hashicorp/terraform/helper/schema.(*Resource).Apply(0xc420307a40, 0xc4207b80a0, 0xc420794980, 0x216ec60, 0xc4201a2b40, 0x1, 0xc4204dca50, 0xc4202e46f0)
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/opt/teamcity-agent/work/222ea50a1b4f75f4/src/github.com/terraform-providers/terraform-provider-google/vendor/github.com/hashicorp/terraform/helper/schema/resource.go:227 +0x364
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: github.com/terraform-providers/terraform-provider-google/vendor/github.com/hashicorp/terraform/helper/schema.(*Provider).Apply(0xc42034eee0, 0xc4207b8050, 0xc4207b80a0, 0xc420794980, 0x33be458, 0x0, 0xc42034eee0)
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/opt/teamcity-agent/work/222ea50a1b4f75f4/src/github.com/terraform-providers/terraform-provider-google/vendor/github.com/hashicorp/terraform/helper/schema/provider.go:283 +0xa4
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: github.com/terraform-providers/terraform-provider-google/vendor/github.com/hashicorp/terraform/plugin.(*ResourceProviderServer).Apply(0xc4207a59e0, 0xc420794500, 0xc4207262d0, 0x0, 0x0)
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/opt/teamcity-agent/work/222ea50a1b4f75f4/src/github.com/terraform-providers/terraform-provider-google/vendor/github.com/hashicorp/terraform/plugin/resource_provider.go:527 +0x57
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: reflect.Value.call(0xc420428a80, 0xc42000c830, 0x13, 0x24702a9, 0x4, 0xc420570f20, 0x3, 0x3, 0xc420445ee8, 0xc4201d4028, ...)
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/usr/local/go/src/reflect/value.go:434 +0x905
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: reflect.Value.Call(0xc420428a80, 0xc42000c830, 0x13, 0xc420445f20, 0x3, 0x3, 0xc400000005, 0x0, 0xc420429740)
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/usr/local/go/src/reflect/value.go:302 +0xa4
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: net/rpc.(*service).call(0xc4208f9400, 0xc4206c43c0, 0xc42079a3c0, 0xc42068c180, 0xc4207c8560, 0x202f800, 0xc420794500, 0x16, 0x202f840, 0xc4207262d0, ...)
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/usr/local/go/src/net/rpc/server.go:381 +0x142
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: created by net/rpc.(*Server).ServeCodec
2018-03-20T17:06:09.735-0400 [DEBUG] plugin.terraform-provider-google_v1.7.0_x4: 	/usr/local/go/src/net/rpc/server.go:475 +0x36b

[paddycarver]

I traced this a bit, the error is in line 467 of resource_compute_backend_service.go, but I see @danawillow has assigned herself, so I'll drop this here and then back away. :)

[danawillow]

lol @paddycarver too slow 😛

@tomwilkie just curious (while I work on a fix), what's your use case for setting both fields to the empty string?

[tomwilkie]

No good use case; I was trying to optionally enable Iap in a module by leaving it blank. Thanks for the fix!

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 [email protected]. Thanks!