AutoYaST ask tags for network fail

SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 12 Service Pack 1 (SLES 12 SP1)
SUSE Linux Enterprise Server 11 Service Pack 4 (SLES 11 SP4)

An autoyast control file is configured to ask for various network settings. However, it fails to configure the IP address and errors out on the default route. If left unattended, the installation completes, but the networking is not configured properly.

The following error is observed.

Internal error. Please report a bug report with logs.
Details: private method 'select' called for nil:NilClass
Caller: /usr/share/YaST2/modules/Routing.rb:315:in 'write_route_file'

The administrator is prompted for the interface IP addresses based on the ask tag, but the addresses do not get configured and produce no errors.

The /var/log/YaST2/y2log shows the following:

[Ruby] clients/inst_autopost.rb:154 Calling auto client with: $["dns":$["dhcp_hostname":false, "dhcp_resolv":false, "domain":"utopia.com", "hostname":"linuxhost", "nameservers":["192.168.200.2"], "searchlist":["utopia.com"]], "interfaces":nil, "ipv6":true, "keep_install_network":false, "managed":false, "routing":$["ip_forward":false, "ipv4_forward":false, "ipv6_forward":false, "routes":nil], "start_immediately":true]

[Ruby] clients/lan_auto.rb:275 input=$["config":$["dhcp":$["DHCLIENT_SET_HOSTNAME":false]], "devices":$[], "dns":$["dhcp_hostname":false, "dhcp_resolv":false, "domain":"utopia.com", "hostname":"linuxhost", "nameservers":["192.168.200.2"], "searchlist":["utopia.com"]], "hwcfg":$[], "interfaces":[], "ipv6":true, "keep_install_network":false, "managed":false, "routing":$["ip_forward":false, "ipv4_forward":false, "ipv6_forward":false, "routes":nil], "start_immediately":true]

The following sections are found in the autoyast control file.

  <general>
    <ask-list config:type="list">
      <ask>
        <path>networking,dns,hostname</path>
        <question>Enter Hostname (server name)</question>
        <stage>initial</stage>
        <default>linux</default>
      </ask>
      <ask>
        <path>networking,interfaces,interface,0,ipaddr</path>
        <question>Enter the server IP address for eth0:</question>
        <stage>initial</stage>
        <default>192.168.2.10</default>
      </ask>
      <ask>
        <path>networking,interfaces,interface,1,ipaddr</path>
        <question>Enter the server IP address for eth1:</question>
        <stage>initial</stage>
        <default>192.168.2.11</default>
      </ask>
      <ask>
        <path>networking,routing,routes,route,0,gateway</path>
        <question>Enter the primary Gateway Address:</question>
        <stage>initial</stage>
        <default>192.168.2.2</default>
      </ask>
    </ask-list>
  </general>

  <networking>
    <dns>
      <dhcp_hostname config:type="boolean">false</dhcp_hostname>
      <dhcp_resolv config:type="boolean">false</dhcp_resolv>
      <domain>utopia.com</domain>
      <hostname>linux</hostname>
       <nameservers config:type="list">
         <nameserver>192.168.200.2</nameserver>
       </nameservers>
      <searchlist config:type="list">
        <search>utopia.com</search>
      </searchlist>
    </dns>
    <interfaces config:type="list">
      <interface>
        <bootproto>static</bootproto>
        <broadcast>192.168.1.255</broadcast>
        <device>eth0</device>
        <ethtool_options>autoneg on</ethtool_options>
        <ipaddr>10.0.0.1</ipaddr>
        <netmask>255.255.255.0</netmask>
        <network/>
        <startmode>onboot</startmode>
      </interface>
      <interface>
        <bootproto>static</bootproto>
        <broadcast>192.168.1.255</broadcast>
        <device>eth1</device>
        <ethtool_options>autoneg on</ethtool_options>
        <ipaddr>20.0.0.1</ipaddr>
        <netmask>255.255.255.0</netmask>
        <network/>
        <startmode>onboot</startmode>
      </interface>
    </interfaces>
    <routing>
      <ip_forward config:type="boolean">false</ip_forward>
      <ipv4_forward config:type="boolean">false</ipv4_forward>
      <ipv6_forward config:type="boolean">false</ipv6_forward>
      <routes config:type="list">
        <route>
          <destination>default</destination>
          <device>-</device>
          <gateway>0.0.0.0</gateway>
          <netmask>-</netmask>
        </route>
      </routes>
    </routing>
    <ipv6 config:type="boolean">true</ipv6>
    <keep_install_network config:type="boolean">false</keep_install_network>
    <managed config:type="boolean">false</managed>
  </networking>

Change the following <ask><path> values from:

        <path>networking,interfaces,interface,0,ipaddr</path>
        <path>networking,interfaces,interface,1,ipaddr</path>
        <path>networking,routing,routes,route,0,gateway</path>

to:

        <path>networking,interfaces,0,ipaddr</path>
        <path>networking,interfaces,1,ipaddr</path>
        <path>networking,routing,routes,0,gateway</path>

Even though the error suggests reporting a bug for Routing.rb; the problem is a configuration issue, not a bug.

Invalid <ask><path> values.

The <ask><path> tag expects a list of the XML tags that represent the "path" to the value the ask tag is supposed to change. List entry tags are referenced by their ordered number only, not by their tag. For example.

<path>networking,interfaces,interface,0,ipaddr</path>

Implies an XML chain of <networking><interfaces><interface>0<ipaddr>. This is supposed to be the value changed. However, in this case the <interface> tag is not expected, only the numerical list number of the <interface> entries. So the correct XML chain is <networking><interfaces>0<ipaddr>, referring to the first <interface> list element in the AutoYaST control file.