rndc showzone does not work for all zones

Summary

It seems that command rndc showzone does not work for certain zones, at very least for built-in zones. This is super inconvenient for scripts which iterate over all zones with intent to get and modify configuration of running process.

BIND version used

BIND 9.13.0-dev id:883a9485e9 commit 883a9485 Date: Thu Feb 15 11:56:13 2018 -0800

Steps to reproduce

$ rndc showzone 10.in-addr.arpa.

What is the current bug behavior?

rndc: 'showzone' failed: failure

What is the expected correct behavior?

Ideally equivalent which can be copied into back to config file and does not break anything. (Alternatively a more useful error message.)