using a splat inside of toset() caused a crash

[fv-robert]

Terraform Version

Terraform v0.12.7

Terraform Configuration Files

resource "aws_route_table_association" "public_route_table_association" {
  for_each       = toset("${aws_subnet.public_subnet[*].id}")
  subnet_id      = each.value
  route_table_id = "${aws_route_table.public_route_table.id}"
}

Debug Output

Crash Output

https://gist.github.com/fv-robert/3e9abcc39b940fb64d97ffac88a1e011

Expected Behavior

It should have given me an error or success message.

Actual Behavior

It crashed.

Steps to Reproduce

1. terraform init
2. terraform plan

Additional Context

References

[hashibot]

Hello! 🤖

This issue seems to be covering the same problem or request as #22580, so we're going to close it just to consolidate the discussion over there. Thanks!

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.