2017/03/23 12:17:22 [INFO] Terraform version: 0.9.1
2017/03/23 12:17:22 [INFO] Go runtime version: go1.8
2017/03/23 12:17:22 [INFO] CLI args: []string{"/usr/local/Cellar/terraform/0.9.1_1/bin/terraform", "apply"}
2017/03/23 12:17:22 [DEBUG] Detected home directory from env var: /Users/username
2017/03/23 12:17:22 [DEBUG] Detected home directory from env var: /Users/username
2017/03/23 12:17:22 [DEBUG] Attempting to open CLI config file: /Users/username/.terraformrc
2017/03/23 12:17:22 [DEBUG] File doesn't exist, but doesn't need to. Ignoring.
2017/03/23 12:17:22 [DEBUG] Detected home directory from env var: /Users/username
2017/03/23 12:17:22 [INFO] CLI command args: []string{"apply"}
2017/03/23 12:17:22 [DEBUG] command: loading backend config file: /Users/username/temp
2017/03/23 12:17:22 [DEBUG] command: no data state file found for backend config
2017/03/23 12:17:22 [DEBUG] New state was assigned lineage "da297e32-5ae1-43dc-ae9f-6b35ba204b10"
2017/03/23 12:17:22 [INFO] command: backend initialized: <nil>
2017/03/23 12:17:22 [INFO] command: backend <nil> is not enhanced, wrapping in local
2017/03/23 12:17:22 [INFO] backend/local: starting Apply operation
2017/03/23 12:17:22 [INFO] terraform: building graph: GraphTypeInput
2017/03/23 12:17:22 [DEBUG] ReferenceTransformer: "var.constraint" references: []
2017/03/23 12:17:22 [DEBUG] ReferenceTransformer: "output.out" references: [var.constraint]
2017/03/23 12:17:22 [DEBUG] Starting graph walk: walkInput
2017/03/23 12:17:22 [DEBUG] dag/walk: added new vertex: "output.out"
2017/03/23 12:17:22 [DEBUG] dag/walk: added new vertex: "var.constraint"
2017/03/23 12:17:22 [DEBUG] dag/walk: added edge: "output.out" waiting on "var.constraint"
2017/03/23 12:17:22 [DEBUG] dag/walk: dependencies changed for "output.out", sending new deps
2017/03/23 12:17:22 [DEBUG] dag/walk: walking "var.constraint"
2017/03/23 12:17:22 [DEBUG] vertex 'root.var.constraint': walking
2017/03/23 12:17:22 [DEBUG] dag/walk: walking "output.out"
2017/03/23 12:17:22 [DEBUG] vertex 'root.output.out': walking
2017/03/23 12:17:22 [DEBUG] vertex 'root.output.out': evaluating
2017/03/23 12:17:22 [DEBUG] root: eval: *terraform.EvalOpFilter
2017/03/23 12:17:22 [DEBUG] root: eval: *terraform.EvalSequence
2017/03/23 12:17:22 [DEBUG] root: eval: *terraform.EvalWriteOutput
2017/03/23 12:17:22 [DEBUG] plugin: waiting for all plugin processes to complete...
1 error(s) occurred:

* module root: 1 error(s) occurred:

* Variable 'constraint': cannot contain interpolations