street parsing fatals rather than graceful error when it mis-assigns values to street_unit

I've hit this twice in 2 days - when the address somehow doesn't
parse right either the contact can't be saved or the job.geocode script crashes e.g

drush cvapi job.geocode parse=1 geocoding='false'
Array
(
[error_code] => unknown error
[sql] => UPDATE civicrm_address SET street_number = 267 , street_number_su ffix = NULL , street_name = 'C' , street_unit = 'aptain Bob Smith Rd' WHERE ( civicrm_address.id = 2555 ) [nativecode=1406 ** Data too long for column 's treet_unit' at row 1]
[tip] => add debug=1 to your API call to have more info about the error
[is_error] => 1
[error_message] => DB Error: unknown error
)