Cannot use conditional in locals block

[oonisim]

Terraform Version

0.12.2

Terraform Configuration Files

locals {
  sg_lb_chat_service_api_ips = [
    "10.5.1.72",
    "10.5.2.21",
    "10.5.0.16"
  ]
  cidr_blocks = true ? [ for ip in local.sg_lb_chat_service_api_ips : "${ip}/32" ] : null   # <---- Does not work.
}

output "hoge" {
  value = local.cidr_blocks # <---- Does not show anything
}

Debug Output

Crash Output

Expected Behavior

Condition can be used in locals block.

Actual Behavior

When condition is specified in loccals block, no error and does not work.

Steps to Reproduce

Additional Context

References

[jbardin]

Closed by #21957

[ghost]

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