### Terraform Version ```shell 1.4.0-beta2 ``` ### Terraform Configuration Files ```terraform terraform { required_providers { fakerancher = { source = "app.staging.terraform.io/example_corp/fakerancher" version = ">= 0.0.1" } } cloud { hostname = "app.staging.terraform.io" organization = "example_corp" workspaces { name = "beta-jam" } } } ``` ### Debug Output (Omitting, since I already found the code in question.) ### Expected Behavior Terraform should be able to download and use providers published in any valid organization namespace, from the public registry or from TFC/TFE's private registry. ### Actual Behavior If a TFC organization has underscores in its name (**edit:** or doubled hyphens `--`), Terraform cannot access any providers it publishes: ``` Initializing Terraform Cloud... There are some problems with the configuration, described below. The Terraform configuration must be valid before initialization so that Terraform can determine which modules and providers need to be installed. ╷ │ Error: Invalid provider namespace │ │ on main.tf line 4, in terraform: │ 4: source = "app.staging.terraform.io/example_corp/fakerancher" │ │ Invalid provider namespace "" in source "app.staging.terraform.io/example_corp/fakerancher": must contain only │ letters, digits, and dashes, and may not use leading or trailing dashes" ╵ ``` (Note also the malformed error message, with an empty string in place of the provided namespace.) I've tracked this down to `tfaddr.ParseProviderPart`, [in the hashicorp/terraform-registry-address package](https://github.com/hashicorp/terraform-registry-address/blob/189d3aff273ef3375c37a7bf1f77ba375473cf28/provider.go#L402). It uses idna hostname parsing rules to parse namespace and name segments, which I'm pretty sure is invalid given the semantics of those segments; in addition to excluding valid org names, it also flattens the case of the address, which can result in self-inflicted 404s for namespaces that include capital letters. It should instead match the behavior of our own registries, which basically comes down to `[0-9A-Za-z][\w\-]*[0-9A-Za-z]`. ### Steps to Reproduce 1. `terraform init` (that's all) ### Additional Context _No response_ ### References _No response_