"non-recoverable error" when editing non-existent Drupal user

If you visit /user/x/edit, where x is a non-existent user (yes, this happens), then CiviCRM throws a CRM_Core_Error

" Sorry. A non-recoverable error has occurred.

Database Error Code: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7, 1064"

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

[code] => -2
[message] => DB Error: syntax error
[mode] => 16
[debug_info] => SELECT civicrm_contact.display_name, civicrm_email.email, civicrm_location.location_type_id, civicrm_location.id
FROM civicrm_contact
LEFT JOIN civicrm_location ON (civicrm_location.entity_table = 'civicrm_contact' AND
civicrm_contact.id = civicrm_location.entity_id AND
civicrm_location.is_primary = 1)
LEFT JOIN civicrm_email ON (civicrm_location.id = civicrm_email.location_id AND civicrm_email.is_primary = 1)
WHERE civicrm_contact.id = [nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7]
[type] => db_error
[user_info] => SELECT civicrm_contact.display_name, civicrm_email.email, civicrm_location.location_type_id, civicrm_location.id
FROM civicrm_contact
LEFT JOIN civicrm_location ON (civicrm_location.entity_table = 'civicrm_contact' AND
civicrm_contact.id = civicrm_location.entity_id AND
civicrm_location.is_primary = 1)
LEFT JOIN civicrm_email ON (civicrm_location.id = civicrm_email.location_id AND civicrm_email.is_primary = 1)
WHERE civicrm_contact.id = [nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7]
[to_string] => [db_error: message="DB Error: syntax error" code=-2 mode=callback callback=CRM_Core_Error::handle prefix="" info=" SELECT civicrm_contact.display_name, civicrm_email.email, civicrm_location.location_type_id, civicrm_location.id
FROM civicrm_contact
LEFT JOIN civicrm_location ON (civicrm_location.entity_table = 'civicrm_contact' AND
civicrm_contact.id = civicrm_location.entity_id AND
civicrm_location.is_primary = 1)
LEFT JOIN civicrm_email ON (civicrm_location.id = civicrm_email.location_id AND civicrm_email.is_primary = 1)
WHERE civicrm_contact.id = [nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7]"]
)

Seems like nitpicking, but it looks ugly, and, who knows, this traceback might expose some security flaw.