| # delete extra field by index | |
| program modify | |
| args encrypt.zip delete_extra 0 2 cl get_extra_by_id 0 2345 0 c get_extra_by_id 0 2345 0 l | |
| file encrypt.zip encrypt_plus_extra.zip encrypt.zip | |
| return 1 | |
| stderr can't get extra field data for file at index 0, extra field id 2345, ef index 0, flags 512: No such file | |
| stderr can't get extra field data for file at index 0, extra field id 2345, ef index 0, flags 256: No such file |