BUG #14825: enum type: unsafe use?

The following bug has been logged on the website:

Bug reference: 14825
Logged by: Balazs Szilfai
Email address: balazs(at)obiserver(dot)hu
PostgreSQL version: 10beta4
Operating system: Debian Linux
Description:

Hi,

version: 10rc1

testdb=# begin;
BEGIN
testdb=# create type enumtype as enum ('v1', 'v2');
CREATE TYPE
testdb=# create table testtable (enumcolumn enumtype not null default
'v1');
CREATE TABLE

Everything it's OK! :)

If enum type have "owner to":

testdb=# begin;
BEGIN
testdb=# create type enumtype as enum ('v1', 'v2');
CREATE TYPE
testdb=# alter type enumtype owner to testrole;
ALTER TYPE
testdb=# create table testtable (enumcolumn enumtype not null default
'v1');
ERROR: unsafe use of new value "v1" of enum type enumtype
HINT: New enum values must be committed before they can be used.

Is this unsafe?

Balazs