Cycle error during validation introduced in terraform version 1.8.1

[jbeaven2]

Terraform Version

v1.8.1

Terraform Configuration Files

This calls a source module which has dependencies.

Debug Output

This is a large repo and debug/trace generates 20000 lines. Having reviewed these, nothing stands out.

Expected Behavior

I expected the terraform validation to be successful and for terraform plan to run.

Actual Behavior

Error during terraform validation:

Error: Cycle: module.app.azurerm_application_insights_api_key.read_telemetry, module.app.azurerm_role_assignment.rbac_permissions_on_app_configuration, module.app.azurerm_application_insights.appinsights, module.app.data.azurerm_monitor_diagnostic_categories.this, module.app.azurerm_monitor_diagnostic_setting.web_app_diagnostics, module.app (close), module.app.output.windows_web_app (expand), data.azurerm_application_insights.parent_app_insights, module.app.var.app_insights_exist (expand), module.app.azurerm_windows_web_app.windows_web_app, module.app.azurerm_private_endpoint.appservice_pep

Older versions of terraform do not have this issue. The latest version of terraform which doesn't have this issue and the validation works is v1.8.0.

Steps to Reproduce

na

Additional Context

Release notes for 1.8.1 https://github.com/hashicorp/terraform/releases/tag/v1.8.1

References

No response

[jbardin]

Hi @jbeaven2,

Thanks for filing the issue! In order to inspect how exactly the cycle is connected, we will also need the associated configuration. Seeing how this is detectable during validation, it should not actually require any state or provider configuration, so if the configuration can't be provided you may be able to replicate the module and resource structure in a more minimal example.

Thanks!