warning: use of deprecated associated function `clap::ArgMatches::is_present`: Replaced with either `ArgAction::SetTrue` or `ArgMatches::contains_id(...)`
  --> tests/derive_ui/non_existent_attr.rs:15:12
   |
15 |     debug: bool,
   |            ^^^^
   |
   = note: `#[warn(deprecated)]` on by default

warning: use of deprecated associated function `clap::ArgMatches::is_present`: Replaced with either `ArgAction::SetTrue` or `ArgMatches::contains_id(...)`
  --> tests/derive_ui/non_existent_attr.rs:15:12
   |
15 |     debug: bool,
   |            ^^^^

error[E0599]: no method named `non_existing_attribute` found for struct `Arg` in the current scope
  --> tests/derive_ui/non_existent_attr.rs:14:19
   |
14 |     #[clap(short, non_existing_attribute = 1)]
   |                   ^^^^^^^^^^^^^^^^^^^^^^ method not found in `Arg<'_>`