Jira (PUP-10413) Overriding a default argument with undef has no effect

[Felix (Jira)]

Title: Message Title

Felix created an issue   Puppet / PUP-10413 Overriding a default argument with undef has no effect Issue Type: Bug Affects Versions: PUP 5.5.10 Assignee: Unassigned Components: Language Created: 2020/04/06 10:15 AM Priority: Normal Reporter: Felix Puppet Version: 5.5.10 Puppet Server Version: N/A OS Name/Version: Debian 10.3 $ cat testcase.pp define resource($key = $name) { if($key == undef ){ warning("Case 1") } else { warning("Case 2") } } resource{'blub': key => undef } $ puppet apply testcase.pp Desired Behavior: Warning: Scope(Resource[blub]): Case 1 Actual Behavior: Warning: Scope(Resource[blub]): Case 2 The behavior seems to be kind-of intended: From the docs: The undef value is useful for testing whether a variable has been set. Also, you can use it to un-set resource attributes that have inherited values from a resource default, causing the attribute to be unmanaged. So do I see this correctly that there is no way to pass "undef" to a resource which has a default assigned to the specific parameter? Because it would seem natural to me, to have a resource, with an optional parameter, that has some default value, with the option to un-set this default value on a per-instance basis. Add Comment   This message was sent by Atlassian Jira (v8.5.2#805002-sha1:a66f935) -- You received this message because you are subscribed to the Google Groups "Puppet Bugs" group. To unsubscribe from this group and stop receiving emails from it, send an email to puppet-bugs+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/puppet-bugs/JIRA.354349.1586193307000.31116.1586193360054%40Atlassian.JIRA.