Terraform Version

Terraform v1.8.1
on linux_amd64
+ provider registry.terraform.io/hashicorp/external v2.3.3

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is 1.8.2. You can update by downloading from https://www.terraform.io/downloads.html

Terraform Configuration Files

resource "pf9_cluster" "cluster" {
  name = var.cluster_name
  addons = {
    "kubernetes-dashboard" = null
  }
}

Debug Output

https://gist.github.com/TheNilesh/641b223a094ecc78252c4cd6a675b5f4

Expected Behavior

No crash

Actual Behavior

!!!!!!!!!!!!!!!!!!!!!!!!!!! TERRAFORM CRASH !!!!!!!!!!!!!!!!!!!!!!!!!!!!

Steps to Reproduce

1. Find a terraform provider that has been developed using terraform plugin framework
2. The provider should have an attribute of type map_nested. map-nested
3. The practitioner should set the value of the key from the map to null and run terraform apply

Example terraform configuration to reproduce this error

resource "examplecloud_thing" "example" {
  example_attribute = {
    "key1" = {
        attr = "one"
    },
    # The following attribute value will cause panic. 
    # I believe terraform is trying to load the value of the attribute "key2" in map[string]interface{} 
    # before checking if it is nil.
    "key2" = null
  }
}

Additional Context

• I am the author of the terraform provider. Here's the schema
• The provider is developed using a plugin framework. During debugging this crash happens after calling ModifyPlan()
• The issue is associated with the setting value of the map_nested element to null in the config. In this case addons is of type map_nested and kubernetes-dashboard(key inside the map) was set to null by the practitioner.

References

No response