puppetlabs/puppet · error · ArgumentError

Can only delete from an Array or Hash.

Error message

Can only delete from an Array or Hash.

What it means

Error "Can only delete from an Array or Hash." thrown in puppetlabs/puppet.

Source

Thrown at lib/puppet/pops/evaluator/evaluator_impl.rb:1275

  def delete(x, y)
    result = x.dup
    case x
    when Array
      y = case y
          when Array then y
          when Hash  then y.to_a
          else            [y]
          end
      y.each { |e| result.delete(e) }
    when Hash
      y = case y
          when Array then y
          when Hash  then y.keys
          else            [y]
          end
      y.each { |e| result.delete(e) }
    else
      raise ArgumentError, _("Can only delete from an Array or Hash.")
    end
    result
  end

  # Implementation of case option matching.
  #
  # This is the type of matching performed in a case option, using == for every type
  # of value except regular expression where a match is performed.
  #
  def is_match?(left, right, o, option_expr, scope)
    @@compare_operator.match(left, right, scope)
  end

  # Maps the expression in the given array to their product except for UnfoldExpressions which are first unfolded.
  # The result is added to the given result Array.
  # @param result [Array] Where to add the result (may contain information to add to)
  # @param array [Array[Model::Expression] the expressions to map
  # @param scope [Puppet::Parser::Scope] the scope to evaluate in

View on GitHub (pinned to e227c27540)

When it happens

Trigger: Thrown at lib/puppet/pops/evaluator/evaluator_impl.rb:1275 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of puppetlabs/puppet@e227c27540 (2026-08-21). Data as JSON: /api/errors/7d18e9fb5841aa2c. Report an issue: GitHub.