BIND 10 #1627: Error: Server configuration failed: incomplete textual name

[BIND 10 Development]

#1627: Error: Server configuration failed: incomplete textual name
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            Reporter:  jreed     |                        Owner:
                Type:  defect    |                       Status:  new
            Priority:  major     |                    Milestone:  New Tasks
           Component:  bind-ctl  |                     Keywords:
           Sensitive:  0         |              Defect Severity:  N/A
         Sub-Project:  Core      |  Feature Depending on Ticket:
Estimated Difficulty:  0         |          Add Hours to Ticket:  0
         Total Hours:  0         |                    Internal?:  0
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 {{{
 > config go /Auth/
 /Auth> config go datasources
 /Auth/datasources> config show
 Auth/datasources        []      list    (default)
 /Auth/datasources> config add
 /Auth/datasources> config show
 Auth/datasources[0]/type        ""      string  (default)
 Auth/datasources[0]/class       "IN"    string  (default)
 Auth/datasources[0]/zones       []      list    (default)
 /Auth/datasources> config go [0]
 /Auth/datasources[0]> config show
 Auth/datasources[0]/type        ""      string  (default)
 Auth/datasources[0]/class       "IN"    string  (default)
 Auth/datasources[0]/zones       []      list    (default)
 /Auth/datasources[0]> config set type memory
 /Auth/datasources[0]> config add zones
 /Auth/datasources[0]> config show
 Auth/datasources[0]/type        "memory"        string  (modified)
 Auth/datasources[0]/class       "IN"    string  (default)
 Auth/datasources[0]/zones/      list    (modified)
 /Auth/datasources[0]> config commit
 Error: Server configuration failed: incomplete textual name
 Configuration not committed
 /Auth/datasources[0]>
 }}}

 This error is unclear. The same error is in the log.

 What is incomplete?

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Ticket URL: <http://bind10.isc.org/ticket/1627>
BIND 10 Development <http://bind10.isc.org>
BIND 10 Development