Can't Modify Frozen String

[smford22]

Version:

$ chef gem list knife-google

*** LOCAL GEMS ***

knife-google (3.1.0)

Environment: [Details about the environment such as the Operating System, cookbook details, etc...]

Windows 7 Enterprise
ChefDK 1.1.16

Scenario:

knife google server create "chef-knife-test" --gce-project "project-name" --gce-zone "zone"  --gce-machine-type "n1-standard-1" --gce-subnet "compute-uswest" --gce-network "development" --gce-service-account-scopes “<LIST OF SCOPES>” --gce-tags "no-ip","webservices" --gce-image "compute-golden2" --gce-image-project "project-id" --gce-boot-disk-size "10" -x “username” -i “path-to-key” --sudo -r 'role[base_linux]'

Steps to Reproduce:

Run the above command

Expected Result:

A server should be created

Actual Result:

Output shows an error can't modify frozen string

Running with -VV shows an error on ../knife-google-3.1.0/lib/chef/knife/cloud/google_service:248:in downcase!: can't modify a frozen string

247:     def valid_public_ip_setting?(public_ip)
    248: require 'pry';binding.pry
=> 249:       public_ip.downcase! if public_ip.respond_to?(:downcase)
    250:
    251:       if public_ip.nil? || public_ip == "ephemeral" || public_ip == "none"
    252:         true
    253:       elsif valid_ip_address?(public_ip)
    254:         true
    255:       else
    256:         false
    257:       end
    258:     end
[1] pry(#<Chef::Knife::Cloud::GoogleService>)> public_ip
=> "EPHEMERAL"
[2] pry(#<Chef::Knife::Cloud::GoogleService>)> public_ip.downcase! if public_ip.respond_to?(:downcase)
RuntimeError: can't modify frozen String
from (pry):2:in `downcase!'
[3] pry(#<Chef::Knife::Cloud::GoogleService>)> public_ip.downcase if public_ip.respond_to?(:downcase)
=> "ephemeral"
[4] pry(#<Chef::Knife::Cloud::GoogleService>)>

[jjasghar]

#119 This fixes this issue.