each reference crashes in provisioner block

[pselle]

Terraform Version

0.12.6

Terraform Configuration Files

resource "null_resource" "test_foreach" {
  for_each = {
    key1 = "value1"
    key2 = "value2"
  }
  
  provisioner "local-exec" {
    command = "echo ${each.key} - ${each.value}"
  }
}

Debug Output

Crash Output

https://gist.github.com/pselle/e3ed20b30e7daf48cb58e04f8d7fd310

Expected Behavior

Should not have crashed -- echo should have run successfully

Actual Behavior

Crash

Steps to Reproduce

1. terraform init
2. terraform apply

Additional Context

References

[ghost]

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