Failed to marshal state to json: unsupported attribute

[marcleblanc2]

What happens:

Executing tftui results in early exit during startup.

The TUI loads, and shows:
Executing Terraform init
Executing Terraform show

Then exits, with the message
unsupported attribute "http_protocol_ipv6"
and prints my Terraform state

This was on Terraform CLI v1.3.5, I upgraded it to v1.5.5, tftui still exits after Executing Terraform show, the error message is a little longer:
Failed to marshal state to json: unsupported attribute "http_protocol_ipv6"
but it doesn't print my Terraform state
I checked my Terraform state, and this appears to be an attribute of an aws_instance, under metadata_options

I tried switching to another Terraform repo, tftui exits early there too, this time with:
Failed to marshal state to json: unsupported attribute "secondary_allocation_ids"
I checked my Terraform state, and this appears to be an attribute of an aws_nat_gateway

Versions:
tftui v0.4.2
Installed via pip install tftui
macOS 13.5 (22G74)
M1 Max
Python 3.11.2
Terraform CLI v1.3.5 and v1.5.5
My Terraform state is stored remotely on Terraform Cloud, but tftui / terraform CLI is able to read the state

What I'd like to happen:

• Graceful handling of unsupported attributes

Steps to Reproduce:

• Run tftui

[idoavrah]

Those two error messages are originated in the terraform command itself.
Looks like a known bug, you first need to fix the state. Also, consider upgrading your terraform cli version.

hashicorp/terraform-provider-aws#31637

[marcleblanc2]

Thank you for your help @idoavrah!

The cause of the issue for me is that the AWS Terraform Provider and Terraform CLI on my laptop were a few versions behind the provider and binary used on Terraform Cloud (latest), so I had to run:

brew upgrade terraform
terraform init -upgrade

I also ran a refresh-only Terraform apply via the TFC web UI, I'm not sure if that was required.