Terraform Version

Terraform v0.12.23

Terraform Configuration Files

No file, just a commands

terraform console
setsubtract([["a"], "b", null], ["a"])

Debug Output

https://gist.github.com/allexandr112/6020d1b5da7f2aef98b880ef89511045

Crash Output

https://gist.github.com/allexandr112/b35d5f362bf7649f276d63ec680a9d24

Expected Behavior

I suppose it should be some error message, but no crash

Actual Behavior

Terraform console crashes and panic

Steps to Reproduce

1. terraform console
2. setsubtract([["a"], "b", null], ["a"])

Additional Context

Linux 4.15.0-88-generic x86_64 x86_64 GNU/Linux amd64
NAME="Ubuntu"
VERSION="18.04.1 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.1 LTS"
VERSION_ID="18.04"

References