Panic error when creating aws_cloudfront_origin_request_policy: interface {} is nil, not map[string]interface {}

[Lauan]

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Terraform CLI and Terraform AWS Provider Version

Terraform v1.0.1 on darwin_arm64
provider registry.terraform.io/hashicorp/aws v3.58.0

Affected Resource(s)

• aws_cloudfront_origin_request_policy

Terraform Configuration Files

Please include all Terraform configurations required to reproduce the bug. Bug reports without a functional reproduction may be closed without investigation.

variable "k8s_cache_forwarded_cookies" {
  default     = []
}

variable "k8s_cache_forwarded_headers" {
  default     = []
}

variable "k8s_cache_forwarded_query_strings" {
  default     = []
}

provider "aws" {
  region = "us-east-1"
}

resource "aws_cloudfront_origin_request_policy" "kubernetes" {
  name    = "KubernetesOriginPolicy"
  comment = "Origin Request Policy with custom config"
  cookies_config {
    cookie_behavior = var.k8s_cache_forwarded_cookies == [] ? "none" : "whitelist"
    dynamic "cookies" {
      for_each = var.k8s_cache_forwarded_cookies == [] ? [] : ["go"]
      content {
        items = var.k8s_cache_forwarded_cookies
      }
    }
  }
  headers_config {
    header_behavior = var.k8s_cache_forwarded_headers == [] ? "none" : "whitelist"
    dynamic "headers" {
      for_each = var.k8s_cache_forwarded_headers == [] ? [] : ["go"]
      content {
        items = var.k8s_cache_forwarded_headers
      }
    }
  }
  query_strings_config {
    query_string_behavior = var.k8s_cache_forwarded_query_strings == [] ? "none" : "whitelist"
    dynamic "query_strings" {
      for_each = var.k8s_cache_forwarded_query_strings == [] ? [] : ["go"]
      content {
        items = var.k8s_cache_forwarded_query_strings
      }
    }
  }
}

Debug Output

https://gist.github.com/Lauan/c75f45b971d33813bf7937f16022f4c7

Panic Output

https://gist.github.com/Lauan/c75f45b971d33813bf7937f16022f4c7

Expected Behavior

Creation of the cloudfront origin policy with all behaviors as "none" and no nested blocks

Actual Behavior

It seems to me that the provider is trying to create empty nested blocks, which is not allowed in this context.

Steps to Reproduce

1. terraform apply
   Obs: terraform plan works fine, only crashing when applying

Important Factoids

If you pass non-empty lists for each variable, the resource is created as it should. The issue only happens for empty lists.
Tried to run on my M1 MacBook pro as well as on terraform cloud and the outcome is the same

[ewbankkit]

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

goroutine 87 [running]:
github.com/terraform-providers/terraform-provider-aws/aws.expandCloudFrontOriginRequestPolicyCookiesConfig(0x140003ff830, 0x108d48c8d)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/hashicorp/terraform-provider-aws/aws/cloudfront_origin_request_policy_structure.go:36 +0x1e0
github.com/terraform-providers/terraform-provider-aws/aws.expandCloudFrontOriginRequestPolicyConfig(0x140003e6980, 0x1400018aa90)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/hashicorp/terraform-provider-aws/aws/cloudfront_origin_request_policy_structure.go:114 +0x164
github.com/terraform-providers/terraform-provider-aws/aws.resourceAwsCloudFrontOriginRequestPolicyCreate(0x140003e6980, 0x10a435740, 0x1400199e000, 0xffffffffffffffff, 0x140019d9798)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/src/github.com/hashicorp/terraform-provider-aws/aws/resource_aws_cloudfront_origin_request_policy.go:130 +0x48
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).create(0x140009ada40, 0x10b6b02e8, 0x140003e2580, 0x140003e6980, 0x10a435740, 0x1400199e000, 0x0, 0x0, 0x0)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/pkg/mod/github.com/gdavison/terraform-plugin-sdk/[email protected]/helper/schema/resource.go:318 +0x170
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*Resource).Apply(0x140009ada40, 0x10b6b02e8, 0x140003e2580, 0x140003da460, 0x140012099a0, 0x10a435740, 0x1400199e000, 0x0, 0x0, 0x0, ...)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/pkg/mod/github.com/gdavison/terraform-plugin-sdk/[email protected]/helper/schema/resource.go:456 +0x4ec
github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema.(*GRPCProviderServer).ApplyResourceChange(0x140001a0d50, 0x10b6b02e8, 0x140003e2580, 0x140003bf270, 0x140003e2580, 0x10b08af80, 0x0)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/pkg/mod/github.com/gdavison/terraform-plugin-sdk/[email protected]/helper/schema/grpc_provider.go:955 +0x6f8
github.com/hashicorp/terraform-plugin-go/tfprotov5/server.(*server).ApplyResourceChange(0x140021356e0, 0x10b6b0390, 0x140003e2580, 0x140003da230, 0x140021356e0, 0x1048b54d0, 0x10ae1a220)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/pkg/mod/github.com/hashicorp/[email protected]/tfprotov5/server/server.go:332 +0x94
github.com/hashicorp/terraform-plugin-go/tfprotov5/internal/tfplugin5._Provider_ApplyResourceChange_Handler(0x10b08af80, 0x140021356e0, 0x10b6b0390, 0x140003f00f0, 0x140012e71a0, 0x0, 0x10b6b0390, 0x140003f00f0, 0x140003f2000, 0x2a0)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/pkg/mod/github.com/hashicorp/[email protected]/tfprotov5/internal/tfplugin5/tfplugin5_grpc.pb.go:380 +0x1c8
google.golang.org/grpc.(*Server).processUnaryRPC(0x1400029fdc0, 0x10b6d2fd8, 0x14000866300, 0x140003d2200, 0x140006e0ed0, 0x10efe6660, 0x0, 0x0, 0x0)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/pkg/mod/google.golang.org/[email protected]/server.go:1194 +0x3e8
google.golang.org/grpc.(*Server).handleStream(0x1400029fdc0, 0x10b6d2fd8, 0x14000866300, 0x140003d2200, 0x0)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/pkg/mod/google.golang.org/[email protected]/server.go:1517 +0xa50
google.golang.org/grpc.(*Server).serveStreams.func1.2(0x14001558170, 0x1400029fdc0, 0x10b6d2fd8, 0x14000866300, 0x140003d2200)
	/opt/teamcity-agent/work/5d79fe75d4460a2f/pkg/mod/google.golang.org/[email protected]/server.go:859 +0x94
created by google.golang.org/grpc.(*Server).serveStreams.func1
	/opt/teamcity-agent/work/5d79fe75d4460a2f/pkg/mod/google.golang.org/[email protected]/server.go:857 +0x1f8

Error: The terraform-provider-aws_v3.58.0_x5 plugin crashed!

[ewbankkit]

Similar:

• Terraform provider aws plugin crashed (*GRPCProvider).ApplyResourceChange call #20594
• v3.54.0_x5 plugin crashed on creating aws_cloudfront_origin_request_policy #20589

[Lauan]

Thanks @ewbankkit . And sorry for creating a duplicated thread. twiden's issue is exactly the same as mine.

[github-actions]

This functionality has been released in v3.65.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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 have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.