Concat() requires an array - but it has one

[rnelson0]

I receive this error message in my production branch, which uses v1.8.0 of maestrodev/rvm and v1.1.2 of puppetlabs-concat:

puppet agent -t

...
Error: Could not retrieve catalog from remote server: Error 400 on SERVER: concat(): Requires array to work with at /etc/puppet/environments/production/modules/rvm/manifests/system.pp:36 on node HOSTNAME

The lines in question are https://github.com/maestrodev/puppet-rvm/blob/maestrodev/manifests/system.pp#L27-L36, and I find it odd that L35 does not complain and, best I can tell, feeds its result, an array, into L36, but L36 generates the error. I really don't get the error message. And here's the profile class; hiera provides no parameter overrides to rvm:

class profile::rvm {
  include '::rvm'

  $ruby_version = 'ruby-1.9.3-p551'
  rvm_system_ruby { $ruby_version:
    ensure      => present,
    default_use => true,
  }

  $rvm_gems = [
    'rspec-puppet',
    'puppet',
    'fpm',
    'puppet-lint',
    'puppetlabs_spec_helper',
  ]
  rvm_gem { $rvm_gems:
    ensure       => latest,
    ruby_version => $ruby_version,
    require      => Rvm_system_ruby[$ruby_version],
  }
}

I do not receive this error on a new branch that has rvm v1.8.0 and concat v1.1.2. I don't know the entirety of the differences in concat v1.1.0 and v1.1.2. I'm not sure that's what causes this issue though, as I could swear (without evidence, of course, cause I didn't think I'd need to capture it at the time) that last month when I built this node everything worked fine. Clearly, it doesn't work now.

[carlossg]

concat() doesn't come from puppetlabs-concat, but from puppetlabs-stdlib

You are not setting proxy_url or no_proxy ?

[carlossg]

the issue happened if you were using stdlib [4.0.0, 4.2.0)

[rnelson0]

@carlossg Thank you for the the tip, I had 4.1.0 in the production environment.