--- /dev/null
+error[E0599]: no method named `non_existing_attribute` found for struct `clap::args::arg::Arg<'_, '_>` in the current scope
+ --> $DIR/non_existent_attr.rs:14:24
+ |
+14 | #[structopt(short, non_existing_attribute = 1)]
+ | ^^^^^^^^^^^^^^^^^^^^^^ method not found in `clap::args::arg::Arg<'_, '_>`