### Terraform Version ```shell Code on main branch ``` ### Terraform Configuration Files N/A ### Debug Output N/A ### Expected Behavior Tests pass after this fix is introduced: https://github.com/hashicorp/terraform/pull/38583/changes ### Actual Behavior There is a race condition in tests related to ephemeral resources when that fix is made: ``` % go test -race ./internal/terraform ... ================== --- FAIL: TestContext2Apply_ephemeralProviderRef (0.04s) testing.go:1617: race detected during execution of test FAIL FAIL github.com/hashicorp/terraform/internal/terraform 18.291s FAIL ``` ### Steps to Reproduce Edit L[249 of internal/resources/ephemeral/ephemeral_resources.go](https://github.com/hashicorp/terraform/blame/527402d3fe2de2363c4587e7abd1a3b23669ca25/internal/resources/ephemeral/ephemeral_resources.go#L249): ```diff - r.renewDiags.Append(diags) + r.renewDiags = r.renewDiags.Append(diags) ``` Then run `go test -race ./internal/terraform` ### Additional Context _No response_ ### References Detected by accident in https://github.com/hashicorp/terraform/pull/38583 ### Generative AI / LLM assisted development? Nope