Produced an unexpected new value... was null.. but now cty.SetValEmpty(cty.String)

[zamanh]

Describe the bug

• Running an apply with the same code again causes the diff to change (I have noticed the diff changes happen for either user or group in a similar way)

and gives error:

Provider produced inconsistent result after apply Error : When applying changes to platform_group.mrgroup, provider produced an unexpected new value: This is a bug in the provider, which should be reported in the provider's own issue tracker. . members: was null, but now cty. SetVa1EmptyCcty. String) .

Code snippet

resource "platform_group" "my-group" {
  name             = "my-group"
  description      = "My group"
  auto_join        = true
  admin_privileges = false
}

resource "artifactory_managed_user" "test-user" {
  name     = "test-user"
  password = "dcfsdcfsdc1sdcsdZ!£"
  email    = "[email protected]"
  groups   = [platform_group.my-group.name]
}

resource "artifactory_local_generic_repository" "test-repo" {
  key          = "test-repo-2"
  description  = "Test repository"
}

resource "artifactory_remote_generic_repository" "test-repo-2-remote" {
  key          = "test-repo-2-remote"
  description  = "Test repository"
  url          = "https://test.com"
}

resource "artifactory_virtual_generic_repository" "test-repo-2-virtual" {
  key          = "test-repo-2-virtual"
  description  = "Test repository"
  repositories = [artifactory_local_generic_repository.test-repo.key, artifactory_remote_generic_repository.test-repo-2-remote.key]
}

resource "platform_permission" "my-permission" {
  name = "my-permission-name"

  artifact = {
    actions = {
      groups = [
        {
          name = platform_group.my-group.name
          permissions = ["READ", "WRITE"]
        }
      ]
    }

    targets = [
      {
        name = artifactory_local_generic_repository.test-repo.key
        include_patterns = ["**"]
      }
    ]
  }
}

Requirements for and issue

• A description of the bug
• A fully functioning terraform snippet that can be copy&pasted (no outside files or ENV vars unless that's part of the issue). If this is not supplied, this issue will likely be closed without any effort expended.
• Your version of artifactory: 7.98.9
• Your version of terraform: 1.9.8
• Your version of terraform provider: 1.19.0

Expected behavior

• Re-running an apply against the same Terraform code shouldn't cause any diff change to either groups or users when the code has not been changed

[zamanh]

Another example of the error happening this time on a user (I am using CDKTF in this context, but still reproduced via raw TF)

Produces the same error:

[alexhung]

@zamanh Thanks for the report! I've added this to our plan to investigate and fix.

[alexhung]

@zamanh I'll be opening a PR with a fix to this issue shortly. However, I recommend using ignore_changes with platform_group.members attribute to avoid state drift in the first place. Because after the second apply, the user will be removed from the group and now artifactory_user.groups would have different value.