v0.12: panic: ConfigValueFromHCL2Block used with unknown value

[jtopjian]

Hello,

Per a quick chat with @apparentlymart in Slack earlier today, a Terraform OpenStack Provider user reported the following issue:

https://github.com/terraform-providers/terraform-provider-openstack/issues/493 (crash report included)

and patch: https://github.com/terraform-providers/terraform-provider-openstack/pull/494

The issue is being caused by schema.EnvDefaultFunc using default values of "" for TypeBool. Understandably, this doesn't make sense, but it's a historical setting and hasn't been changed since no one has ever reported an issue.

The PR I linked to suggests setting the default values to false. I've also confirmed that setting the default values to nil resolves the problem, too.

The user did their testing with v0.12.0-alpha2 and I can confirm this still exists as of the most recent commit to master.

I'm totally fine with changing the default values of the TypeBool arguments, but wanted to open this issue to:

1. Report it
2. See if fixing this in core is more appropriate than making the fix in the provider

Please let me know if you have any other questions or need any other information!

[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.