Smarty API insists I use a field that doesn't exist

The following smarty code was tried and trusted in the Phone Number Validator:

{crmAPI var="OptionValues" entity="OptionValue" action="get" sequential="1" option_group_name="phone_type" option_sort="weight"}

As of version 4.7.15 it stopped working and generated this error:

User warning: Smarty error:

{crmAPI}

DB Constraint Violation - option_group_id should possibly be marked as mandatory for OptionValue,get API. If so, please raise a bug report. in Smarty->trigger_error() (line 1094 of /srv/www/dmaster/sites/all/modules/civicrm/packages/Smarty/Smarty.class.php).

When you change it to

{crmAPI var="OptionValues" entity="OptionValue" action="get" sequential="1" option_group_id="phone_type" option_sort="weight"}

You get the same error.

When you change it to

{crmAPI var="OptionValues" entity="OptionValue" action="get" sequential="1" option_group_id="31" option_sort="weight"}

I get a no such field error.