Invalid credentials causes TF segfault with import command

[solocommand]

Terraform Version

Terraform v0.11.10

Terraform Configuration Files

# Configure the Rancher provider
provider "rancher" {
  api_url    = "https://rancher.mydomain.com"
  access_key = "MY_ACCESS_KEY"
  secret_key = "MY_SECRET_KEY"
}

resource "rancher_stack" "existing-stack-name" {

}

Debug & Crash Output

https://gist.github.com/solocommand/3b41715835a196da7e1ff77c37669069

Expected Behavior

Rancher provider should handle an authentication failure and throw a handled error

Actual Behavior

401/3 returned from rancher API caused empty response and segfault in TF process

Steps to Reproduce

1. terraform init
2. terraform import rancher_stack.existing-stack-name [ENV_ID]/[STACK_ID]

Additional Context

The access key and secret key provided in the config are environment keys, specific to another environment.