[INFO] crate rusty-keys 0.0.2 is already in cache
[INFO] checking rusty-keys-0.0.2 against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] extracting crate rusty-keys 0.0.2 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate rusty-keys 0.0.2 on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rusty-keys 0.0.2
[INFO] finished tweaking crates.io crate rusty-keys 0.0.2
[INFO] tweaked toml for crates.io crate rusty-keys 0.0.2 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 83b350337409dd5d4d85be17680d2f3bc80e3b259ff4fe81e4f139808334eead
[INFO] running `"docker" "start" "-a" "83b350337409dd5d4d85be17680d2f3bc80e3b259ff4fe81e4f139808334eead"`
[INFO] [stderr]     Checking ioctl-sys v0.5.2
[INFO] [stderr]     Checking libudev-sys v0.1.4
[INFO] [stderr]     Checking uinput-sys v0.1.7
[INFO] [stderr]     Checking libudev v0.2.0
[INFO] [stderr]     Checking rusty-keys v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |             fd:  try!(fcntl::open(path.as_ref(), fcntl::O_WRONLY | fcntl::O_NONBLOCK, stat::Mode::empty())),
[INFO] [stderr]    |                  ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:34:24
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let     context    = try!(udev::Context::new());
[INFO] [stderr]    |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:35:24
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let mut enumerator = try!(udev::Enumerator::new(&context));
[INFO] [stderr]    |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:37:3
[INFO] [stderr]    |
[INFO] [stderr] 37 |         try!(enumerator.match_subsystem("misc"));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:38:3
[INFO] [stderr]    |
[INFO] [stderr] 38 |         try!(enumerator.match_sysname("uinput"));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:40:16
[INFO] [stderr]    |
[INFO] [stderr] 40 |         let device = try!(try!(enumerator.scan_devices())
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:40:21
[INFO] [stderr]    |
[INFO] [stderr] 40 |         let device = try!(try!(enumerator.scan_devices())
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 |         Builder::open(try!(device.devnode().ok_or(Error::NotFound)))
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:54:16
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let string = try!(CString::new(value.as_ref()));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 |             try!(Err(nix::Error::from_errno(nix::Errno::EINVAL)));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/device/builder.rs:279:4
[INFO] [stderr]     |
[INFO] [stderr] 279 |             try!(unistd::write(self.fd, slice::from_raw_parts(ptr, size)));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/device/builder.rs:282:4
[INFO] [stderr]     |
[INFO] [stderr] 282 |             try!(ui_dev_create(self.fd));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/device.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 |             try!(unistd::write(self.fd, slice::from_raw_parts(ptr, size)));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/device.rs:69:3
[INFO] [stderr]    |
[INFO] [stderr] 69 |         try!(self.press(kind, code));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/device.rs:70:3
[INFO] [stderr]    |
[INFO] [stderr] 70 |         try!(self.release(kind, code));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/keymapper.rs:31:22
[INFO] [stderr]    |
[INFO] [stderr] 31 |     keymaps: Vec<Box<KeyMapper>>,
[INFO] [stderr]    |                      ^^^^^^^^^ help: use `dyn`: `dyn KeyMapper`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/keymapper.rs:101:34
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut keymaps: Vec<Box<KeyMapper>> = vec!(Box::new(Key::Noop)); // todo: can we share the box?
[INFO] [stderr]     |                                  ^^^^^^^^^ help: use `dyn`: `dyn KeyMapper`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:47:15
[INFO] [stderr]    |
[INFO] [stderr] 47 |         f.write_str(error::Error::description(self))
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |             fd:  try!(fcntl::open(path.as_ref(), fcntl::O_WRONLY | fcntl::O_NONBLOCK, stat::Mode::empty())),
[INFO] [stderr]    |                  ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:34:24
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let     context    = try!(udev::Context::new());
[INFO] [stderr]    |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:35:24
[INFO] [stderr]    |
[INFO] [stderr] 35 |         let mut enumerator = try!(udev::Enumerator::new(&context));
[INFO] [stderr]    |                              ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:37:3
[INFO] [stderr]    |
[INFO] [stderr] 37 |         try!(enumerator.match_subsystem("misc"));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:38:3
[INFO] [stderr]    |
[INFO] [stderr] 38 |         try!(enumerator.match_sysname("uinput"));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:40:16
[INFO] [stderr]    |
[INFO] [stderr] 40 |         let device = try!(try!(enumerator.scan_devices())
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:40:21
[INFO] [stderr]    |
[INFO] [stderr] 40 |         let device = try!(try!(enumerator.scan_devices())
[INFO] [stderr]    |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:43:17
[INFO] [stderr]    |
[INFO] [stderr] 43 |         Builder::open(try!(device.devnode().ok_or(Error::NotFound)))
[INFO] [stderr]    |                       ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:54:16
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let string = try!(CString::new(value.as_ref()));
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/builder.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 |             try!(Err(nix::Error::from_errno(nix::Errno::EINVAL)));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/device/builder.rs:279:4
[INFO] [stderr]     |
[INFO] [stderr] 279 |             try!(unistd::write(self.fd, slice::from_raw_parts(ptr, size)));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/device/builder.rs:282:4
[INFO] [stderr]     |
[INFO] [stderr] 282 |             try!(ui_dev_create(self.fd));
[INFO] [stderr]     |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/device.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 |             try!(unistd::write(self.fd, slice::from_raw_parts(ptr, size)));
[INFO] [stderr]    |             ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/device.rs:69:3
[INFO] [stderr]    |
[INFO] [stderr] 69 |         try!(self.press(kind, code));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/device/device.rs:70:3
[INFO] [stderr]    |
[INFO] [stderr] 70 |         try!(self.release(kind, code));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/keymapper.rs:31:22
[INFO] [stderr]    |
[INFO] [stderr] 31 |     keymaps: Vec<Box<KeyMapper>>,
[INFO] [stderr]    |                      ^^^^^^^^^ help: use `dyn`: `dyn KeyMapper`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/keymapper.rs:101:34
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut keymaps: Vec<Box<KeyMapper>> = vec!(Box::new(Key::Noop)); // todo: can we share the box?
[INFO] [stderr]     |                                  ^^^^^^^^^ help: use `dyn`: `dyn KeyMapper`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 err.description(),
[INFO] [stderr]    |                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 err.description(),
[INFO] [stderr]    |                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:47:15
[INFO] [stderr]    |
[INFO] [stderr] 47 |         f.write_str(error::Error::description(self))
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |                 err.description(),
[INFO] [stderr]    |                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 err.description(),
[INFO] [stderr]    |                     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/device/builder.rs:97:26
[INFO] [stderr]    |
[INFO] [stderr] 97 |             ui_set_evbit(self.fd, EV_KEY as *const c_int)?;
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^ expected `i32`, found *-ptr
[INFO] [stderr]    |
[INFO] [stderr]    = note:     expected type `i32`
[INFO] [stderr]            found raw pointer `*const i32`
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the `?` operator can only be applied to values that implement `std::ops::Try`
[INFO] [stderr]   --> src/device/builder.rs:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 |             ui_set_evbit(self.fd, EV_KEY as *const c_int)?;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `i32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `i32`
[INFO] [stderr]    = note: required by `std::ops::Try::into_result`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/device/builder.rs:97:26
[INFO] [stderr]    |
[INFO] [stderr] 97 |             ui_set_evbit(self.fd, EV_KEY as *const c_int)?;
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^ expected `i32`, found *-ptr
[INFO] [stderr]    |
[INFO] [stderr]    = note:     expected type `i32`
[INFO] [stderr]            found raw pointer `*const i32`
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the `?` operator can only be applied to values that implement `std::ops::Try`
[INFO] [stderr]   --> src/device/builder.rs:97:4
[INFO] [stderr]    |
[INFO] [stderr] 97 |             ui_set_evbit(self.fd, EV_KEY as *const c_int)?;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `i32`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Try` is not implemented for `i32`
[INFO] [stderr]    = note: required by `std::ops::Try::into_result`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/device/builder.rs:100:28
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 ui_set_keybit(self.fd, *key_code)?;
[INFO] [stderr]     |                                        ^^^^^^^^^ expected `i32`, found *-ptr
[INFO] [stderr]     |
[INFO] [stderr]     = note:     expected type `i32`
[INFO] [stderr]             found raw pointer `*const i32`
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the `?` operator can only be applied to values that implement `std::ops::Try`
[INFO] [stderr]    --> src/device/builder.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 ui_set_keybit(self.fd, *key_code)?;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `i32`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the trait `std::ops::Try` is not implemented for `i32`
[INFO] [stderr]     = note: required by `std::ops::Try::into_result`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/device/builder.rs:282:4
[INFO] [stderr]     |
[INFO] [stderr] 282 |             try!(ui_dev_create(self.fd));
[INFO] [stderr]     |             ^^^^^----------------------^^
[INFO] [stderr]     |             |    |
[INFO] [stderr]     |             |    this expression has type `i32`
[INFO] [stderr]     |             expected `i32`, found enum `std::result::Result`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `i32`
[INFO] [stderr]                found enum `std::result::Result<_, _>`
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/device/builder.rs:282:4
[INFO] [stderr]     |
[INFO] [stderr] 282 |             try!(ui_dev_create(self.fd));
[INFO] [stderr]     |             ^^^^^----------------------^^
[INFO] [stderr]     |             |    |
[INFO] [stderr]     |             |    this expression has type `i32`
[INFO] [stderr]     |             expected `i32`, found enum `std::result::Result`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `i32`
[INFO] [stderr]                found enum `std::result::Result<_, _>`
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `unwrap` found for type `i32` in the current scope
[INFO] [stderr]   --> src/device/device.rs:84:28
[INFO] [stderr]    |
[INFO] [stderr] 84 |             ui_dev_destroy(self.fd).unwrap();
[INFO] [stderr]    |                                     ^^^^^^ method not found in `i32`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0308, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/device/builder.rs:100:28
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 ui_set_keybit(self.fd, *key_code)?;
[INFO] [stderr]     |                                        ^^^^^^^^^ expected `i32`, found *-ptr
[INFO] [stderr]     |
[INFO] [stderr]     = note:     expected type `i32`
[INFO] [stderr]             found raw pointer `*const i32`
[INFO] [stderr] 
[INFO] [stderr] error[E0277]: the `?` operator can only be applied to values that implement `std::ops::Try`
[INFO] [stderr]    --> src/device/builder.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |                 ui_set_keybit(self.fd, *key_code)?;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the `?` operator cannot be applied to type `i32`
[INFO] [stderr]     |
[INFO] [stderr]     = help: the trait `std::ops::Try` is not implemented for `i32`
[INFO] [stderr]     = note: required by `std::ops::Try::into_result`
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/device/builder.rs:282:4
[INFO] [stderr]     |
[INFO] [stderr] 282 |             try!(ui_dev_create(self.fd));
[INFO] [stderr]     |             ^^^^^----------------------^^
[INFO] [stderr]     |             |    |
[INFO] [stderr]     |             |    this expression has type `i32`
[INFO] [stderr]     |             expected `i32`, found enum `std::result::Result`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `i32`
[INFO] [stderr]                found enum `std::result::Result<_, _>`
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/device/builder.rs:282:4
[INFO] [stderr]     |
[INFO] [stderr] 282 |             try!(ui_dev_create(self.fd));
[INFO] [stderr]     |             ^^^^^----------------------^^
[INFO] [stderr]     |             |    |
[INFO] [stderr]     |             |    this expression has type `i32`
[INFO] [stderr]     |             expected `i32`, found enum `std::result::Result`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `i32`
[INFO] [stderr]                found enum `std::result::Result<_, _>`
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `unwrap` found for type `i32` in the current scope
[INFO] [stderr]   --> src/device/device.rs:84:28
[INFO] [stderr]    |
[INFO] [stderr] 84 |             ui_dev_destroy(self.fd).unwrap();
[INFO] [stderr]    |                                     ^^^^^^ method not found in `i32`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0277, E0308, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `rusty-keys`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `rusty-keys`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "83b350337409dd5d4d85be17680d2f3bc80e3b259ff4fe81e4f139808334eead"`
[INFO] running `"docker" "rm" "-f" "83b350337409dd5d4d85be17680d2f3bc80e3b259ff4fe81e4f139808334eead"`
[INFO] [stdout] 83b350337409dd5d4d85be17680d2f3bc80e3b259ff4fe81e4f139808334eead
