Issue #9848 has been updated by Nick S.
I'd like to point out that this effect can cause very nasty things to happen, in the same way that any interpolation of an undefined variable can be. For an example, see this thread on the puppet-users list: [Is paramater ordering non-deterministic?](https://groups.google.com/forum/#!topic/puppet-users/6ojC0iAsvz0). See also the similar (fixed) bugs #6534, #5061, and the suggestion that there should be a "strict" pragma in #4408. Could a documentation fix be requested to highlight it as a pitfall in the style guide and the language overview? Warnings about this would also be helpful, in the absence of a proper fix. ---------------------------------------- Bug #9848: Variable interpolation in class parameters seems random https://projects.puppetlabs.com/issues/9848#change-60614 Author: Carlos Sanchez Status: Accepted Priority: Normal Assignee: Category: parameterized classes Target version: Telly Affected Puppet version: 2.7.1 Keywords: parameter variable class interpolation evaluation Branch: In class parameters, things like x="x", y="y${x}" don't always evaluate right (y="yx"), seems random. I'm using 2.7.1 <pre> class test1( $servicex = "sonar", $logfoldera = "${homex}/logs", $logfoldere = "${homey}/logs", $logfolderh = "${homez}/logs", $logfolder = "${homex}/logs", $homex = "/var/${servicex}", $homey = "/var/${servicex}", $homez = "/var/${servicex}") { notice($homex) notice($homey) notice($homez) notice("-----") notice($logfoldera) notice($logfoldere) notice($logfolderh) } </pre> output : <pre> notice: Scope(Class[Test1]): /var/sonar notice: Scope(Class[Test1]): /var/sonar notice: Scope(Class[Test1]): /var/sonar notice: Scope(Class[Test1]): ----- notice: Scope(Class[Test1]): /var/sonar/logs notice: Scope(Class[Test1]): /logs notice: Scope(Class[Test1]): /logs </pre> Note the last two messages should print "/var/sonar/logs" Ordering the paramenters in the order they are needed gets the same result. Just by changing the name of the parameters from class test1 to test2 I get different evaluations of the variables, one is right and two are wrong, you can see that in [this gist](https://gist.github.com/1250837) Commented on [the user list](https://groups.google.com/d/topic/puppet-users/x_BCxE6SQcM/discussion) -- You have received this notification because you have either subscribed to it, or are involved in it. To change your notification preferences, please click here: http://projects.puppetlabs.com/my/account -- You received this message because you are subscribed to the Google Groups "Puppet Bugs" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/puppet-bugs?hl=en.
