$ TF_LOG=TRACE tf init .
2019/04/09 21:26:49 [INFO] Terraform version: 0.11.13
2019/04/09 21:26:49 [INFO] Go runtime version: go1.12
2019/04/09 21:26:49 [INFO] CLI args: []string{"/usr/local/Cellar/terraform/0.11.13/bin/terraform", "init", "."}
2019/04/09 21:26:49 [DEBUG] Attempting to open CLI config file: /Users/adeitcher/.terraformrc
2019/04/09 21:26:49 [DEBUG] File doesn't exist, but doesn't need to. Ignoring.
2019/04/09 21:26:49 [INFO] CLI command args: []string{"init", "."}
2019/04/09 21:26:49 [DEBUG] command: loading backend config file: /tmp/backend-test

Initializing the backend...
2019/04/09 21:26:49 [DEBUG] command: no data state file found for backend config
2019/04/09 21:26:49 [DEBUG] New state was assigned lineage "f2efeb4c-20b6-059f-66c4-38c67e3d3df9"
2019/04/09 21:26:49 [DEBUG] command: asking for input: "region"
region
  The region of the S3 bucket.

  Enter a value: ^C
2019/04/09 21:26:51 [DEBUG] plugin: waiting for all plugin processes to complete...
Error asking for input to configure the backend "s3": region: interrupted