When DNS resolver is misconfigured (it happened to me in Docker container after suspending laptop and resuming in other network), the `terraform plan` command fails on SIGSEGV. I'm using remote backend on `app.terraform.io`. Hopefully, `terraform workspace list` handles error correctly with a reasonable error message `Error: Failed to request discovery document: Get https://app.terraform.io/.well-known/terraform.json: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)` ### Terraform Version ``` Terraform v0.12.9 + provider.aws v2.31.0 ``` ### Terraform Configuration Files Not relevant for this issue ### Debug Output Pasting debug output here since it's very short (TF fails soon): ``` TF_LOG=TRACE terraform apply /tmp/plan 2019/10/07 10:27:18 [INFO] Terraform version: 0.12.9 2019/10/07 10:27:18 [INFO] Go runtime version: go1.12.9 2019/10/07 10:27:18 [INFO] CLI args: []string{"/bin/terraform", "apply", "/tmp/plan"} 2019/10/07 10:27:18 [DEBUG] Attempting to open CLI config file: /root/credentials.tf 2019/10/07 10:27:18 Loading CLI configuration from /root/credentials.tf 2019/10/07 10:27:18 [INFO] CLI command args: []string{"apply", "/tmp/plan"} 2019/10/07 10:27:18 [TRACE] Meta.BackendForPlan: instantiated backend of type *remote.Remote 2019/10/07 10:27:18 [DEBUG] Service discovery for app.terraform.io at https://app.terraform.io/.well-known/terraform.json 2019/10/07 10:27:29 [DEBUG] checking for provider in "." 2019/10/07 10:27:29 [DEBUG] checking for provider in "/bin" 2019/10/07 10:27:29 [DEBUG] checking for provider in ".terraform/plugins/linux_amd64" 2019/10/07 10:27:29 [DEBUG] found provider "terraform-provider-aws_v2.31.0_x4" 2019/10/07 10:27:29 [DEBUG] found valid plugin: "aws", "2.31.0", "/root/aws/.terraform/plugins/linux_amd64/terraform-provider-aws_v2.31.0_x4" 2019/10/07 10:27:29 [DEBUG] checking for provisioner in "." 2019/10/07 10:27:29 [DEBUG] checking for provisioner in "/bin" 2019/10/07 10:27:29 [DEBUG] checking for provisioner in ".terraform/plugins/linux_amd64" 2019/10/07 10:27:29 [TRACE] Meta.BackendForPlan: backend *remote.Remote supports operations ``` ### Crash Output see [crash.log](https://gist.github.com/mouchar/ac53dbd25fadc590c09a8e2e4cd66246) ### Expected Behavior A self-explanatory error message like `Cannot resolve host app.terraform.io: Network timeout` or so. ### Actual Behavior SIGSEGV crash ### Steps to Reproduce 1. have an existing workspace with a remote backend 2. change DNS server in `/etc/resolv.conf` to an unreachable address 3. run `terraform apply` ### Additional Context N/A ### References N/A