Omitting Phone Type on contact form creates crash

If the Phone Type drop down isn't set when entering a new phone number CiviCRM crashes with following error report. Should be validated and caught.

+++++

Sorry. A non-recoverable error has occurred.

Database Error Code: Data truncated for column 'phone_type' at row 1, 1265

Return to CiviCRM menu.

error

Array
(
[callback] => Array
(
[0] => CRM_Core_Error
[1] => handle
)

[code] => -1
[message] => DB Error: unknown error
[mode] => 16
[debug_info] => INSERT INTO civicrm_phone (location_id , phone , phone_type , is_primary ) VALUES ( 12499 , '+44 7841 097101' , '' , 1 ) [nativecode=1265 ** Data truncated for column 'phone_type' at row 1]
[type] => DB_Error
[user_info] => INSERT INTO civicrm_phone (location_id , phone , phone_type , is_primary ) VALUES ( 12499 , '+44 7841 097101' , '' , 1 ) [nativecode=1265 ** Data truncated for column 'phone_type' at row 1]
[to_string] => [db_error: message="DB Error: unknown error" code=-1 mode=callback callback=CRM_Core_Error::handle prefix="" info="INSERT INTO civicrm_phone (location_id , phone , phone_type , is_primary ) VALUES ( 12499 , '+44 7841 097101' , '' , 1 ) [nativecode=1265 ** Data truncated for column 'phone_type' at row 1]"]
)