[INFO] crate i2c-linux 0.1.2 is already in cache
[INFO] extracting crate i2c-linux 0.1.2 into work/ex/clippy-test-run/sources/stable/reg/i2c-linux/0.1.2
[INFO] extracting crate i2c-linux 0.1.2 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/i2c-linux/0.1.2
[INFO] validating manifest of i2c-linux-0.1.2 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of i2c-linux-0.1.2 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing i2c-linux-0.1.2
[INFO] finished frobbing i2c-linux-0.1.2
[INFO] frobbed toml for i2c-linux-0.1.2 written to work/ex/clippy-test-run/sources/stable/reg/i2c-linux/0.1.2/Cargo.toml
[INFO] started frobbing i2c-linux-0.1.2
[INFO] finished frobbing i2c-linux-0.1.2
[INFO] frobbed toml for i2c-linux-0.1.2 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/i2c-linux/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting i2c-linux-0.1.2 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/i2c-linux/0.1.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e5b10a163f77189d5e9c433b75da2d9e5c741d3ffae4bf9b0d276bef7533d196
[INFO] running `"docker" "start" "-a" "e5b10a163f77189d5e9c433b75da2d9e5c741d3ffae4bf9b0d276bef7533d196"`
[INFO] [stderr]    Compiling uninitialized v0.0.2
[INFO] [stderr]     Checking i2c-linux-sys v0.2.0
[INFO] [stderr]     Checking resize-slice v0.1.3
[INFO] [stderr]     Checking i2c-linux v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:413:33
[INFO] [stderr]     |
[INFO] [stderr] 413 |                                 address: address,
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:418:33
[INFO] [stderr]     |
[INFO] [stderr] 418 |                                 address: address,
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:449:37
[INFO] [stderr]     |
[INFO] [stderr] 449 |                                     address: address,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:451:37
[INFO] [stderr]     |
[INFO] [stderr] 451 |                                     flags: flags,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^ help: replace it with: `flags`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:454:37
[INFO] [stderr]     |
[INFO] [stderr] 454 |                                     address: address,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:462:37
[INFO] [stderr]     |
[INFO] [stderr] 462 |                                     address: address,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:464:37
[INFO] [stderr]     |
[INFO] [stderr] 464 |                                     flags: flags,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^ help: replace it with: `flags`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:413:33
[INFO] [stderr]     |
[INFO] [stderr] 413 |                                 address: address,
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:418:33
[INFO] [stderr]     |
[INFO] [stderr] 418 |                                 address: address,
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:449:37
[INFO] [stderr]     |
[INFO] [stderr] 449 |                                     address: address,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:451:37
[INFO] [stderr]     |
[INFO] [stderr] 451 |                                     flags: flags,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^ help: replace it with: `flags`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:454:37
[INFO] [stderr]     |
[INFO] [stderr] 454 |                                     address: address,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:462:37
[INFO] [stderr]     |
[INFO] [stderr] 462 |                                     address: address,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^^^^^ help: replace it with: `address`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/lib.rs:464:37
[INFO] [stderr]     |
[INFO] [stderr] 464 |                                     flags: flags,
[INFO] [stderr]     |                                     ^^^^^^^^^^^^ help: replace it with: `flags`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:235:93
[INFO] [stderr]     |
[INFO] [stderr] 235 |         let value = duration.as_secs() as usize * 1000 + duration.subsec_nanos() as usize / 1000000;
[INFO] [stderr]     |                                                                                             ^^^^^^^ help: consider: `1_000_000`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: this if statement can be collapsed
[INFO] [stderr]    --> src/lib.rs:408:13
[INFO] [stderr]     |
[INFO] [stderr] 408 | /             if !func.contains(Functionality::SMBUS_READ_I2C_BLOCK) || value.len() > i2c::I2C_SMBUS_BLOCK_MAX {
[INFO] [stderr] 409 | |                 if func.contains(Functionality::I2C) {
[INFO] [stderr] 410 | |                     if let Some(address) = self.address {
[INFO] [stderr] 411 | |                         let mut msgs = [
[INFO] [stderr] ...   |
[INFO] [stderr] 426 | |                 }
[INFO] [stderr] 427 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 408 |             if (!func.contains(Functionality::SMBUS_READ_I2C_BLOCK) || value.len() > i2c::I2C_SMBUS_BLOCK_MAX) && func.contains(Functionality::I2C) {
[INFO] [stderr] 409 |     if let Some(address) = self.address {
[INFO] [stderr] 410 |         let mut msgs = [
[INFO] [stderr] 411 |             Message::Write {
[INFO] [stderr] 412 |                 address: address,
[INFO] [stderr] 413 |                 data: &[command],
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this if statement can be collapsed
[INFO] [stderr]    --> src/lib.rs:442:13
[INFO] [stderr]     |
[INFO] [stderr] 442 | /             if !func.contains(Functionality::SMBUS_WRITE_I2C_BLOCK) || value.len() > i2c::I2C_SMBUS_BLOCK_MAX {
[INFO] [stderr] 443 | |                 if func.contains(Functionality::I2C) {
[INFO] [stderr] 444 | |                     if let Some(address) = self.address {
[INFO] [stderr] 445 | |                         let flags = if self.address_10bit { WriteFlags::TENBIT_ADDR } else { WriteFlags::default() };
[INFO] [stderr] ...   |
[INFO] [stderr] 471 | |                 }
[INFO] [stderr] 472 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 442 |             if (!func.contains(Functionality::SMBUS_WRITE_I2C_BLOCK) || value.len() > i2c::I2C_SMBUS_BLOCK_MAX) && func.contains(Functionality::I2C) {
[INFO] [stderr] 443 |     if let Some(address) = self.address {
[INFO] [stderr] 444 |         let flags = if self.address_10bit { WriteFlags::TENBIT_ADDR } else { WriteFlags::default() };
[INFO] [stderr] 445 |         return if func.contains(Functionality::NO_START) {
[INFO] [stderr] 446 |             self.i2c_transfer(&mut [
[INFO] [stderr] 447 |                 Message::Write {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:235:93
[INFO] [stderr]     |
[INFO] [stderr] 235 |         let value = duration.as_secs() as usize * 1000 + duration.subsec_nanos() as usize / 1000000;
[INFO] [stderr]     |                                                                                             ^^^^^^^ help: consider: `1_000_000`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: this if statement can be collapsed
[INFO] [stderr]    --> src/lib.rs:408:13
[INFO] [stderr]     |
[INFO] [stderr] 408 | /             if !func.contains(Functionality::SMBUS_READ_I2C_BLOCK) || value.len() > i2c::I2C_SMBUS_BLOCK_MAX {
[INFO] [stderr] 409 | |                 if func.contains(Functionality::I2C) {
[INFO] [stderr] 410 | |                     if let Some(address) = self.address {
[INFO] [stderr] 411 | |                         let mut msgs = [
[INFO] [stderr] ...   |
[INFO] [stderr] 426 | |                 }
[INFO] [stderr] 427 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 408 |             if (!func.contains(Functionality::SMBUS_READ_I2C_BLOCK) || value.len() > i2c::I2C_SMBUS_BLOCK_MAX) && func.contains(Functionality::I2C) {
[INFO] [stderr] 409 |     if let Some(address) = self.address {
[INFO] [stderr] 410 |         let mut msgs = [
[INFO] [stderr] 411 |             Message::Write {
[INFO] [stderr] 412 |                 address: address,
[INFO] [stderr] 413 |                 data: &[command],
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this if statement can be collapsed
[INFO] [stderr]    --> src/lib.rs:442:13
[INFO] [stderr]     |
[INFO] [stderr] 442 | /             if !func.contains(Functionality::SMBUS_WRITE_I2C_BLOCK) || value.len() > i2c::I2C_SMBUS_BLOCK_MAX {
[INFO] [stderr] 443 | |                 if func.contains(Functionality::I2C) {
[INFO] [stderr] 444 | |                     if let Some(address) = self.address {
[INFO] [stderr] 445 | |                         let flags = if self.address_10bit { WriteFlags::TENBIT_ADDR } else { WriteFlags::default() };
[INFO] [stderr] ...   |
[INFO] [stderr] 471 | |                 }
[INFO] [stderr] 472 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 442 |             if (!func.contains(Functionality::SMBUS_WRITE_I2C_BLOCK) || value.len() > i2c::I2C_SMBUS_BLOCK_MAX) && func.contains(Functionality::I2C) {
[INFO] [stderr] 443 |     if let Some(address) = self.address {
[INFO] [stderr] 444 |         let flags = if self.address_10bit { WriteFlags::TENBIT_ADDR } else { WriteFlags::default() };
[INFO] [stderr] 445 |         return if func.contains(Functionality::NO_START) {
[INFO] [stderr] 446 |             self.i2c_transfer(&mut [
[INFO] [stderr] 447 |                 Message::Write {
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: item `Message<'a>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]   --> src/lib.rs:77:1
[INFO] [stderr]    |
[INFO] [stderr] 77 | / impl<'a> Message<'a> {
[INFO] [stderr] 78 | |     /// Byte length of the message data buffer.
[INFO] [stderr] 79 | |     pub fn len(&self) -> usize {
[INFO] [stderr] 80 | |         match *self {
[INFO] [stderr] ...  |
[INFO] [stderr] 92 | |     }
[INFO] [stderr] 93 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/lib.rs:219:29
[INFO] [stderr]     |
[INFO] [stderr] 219 |         if let Some(func) = self.functionality.clone() {
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.functionality`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/lib.rs:223:34
[INFO] [stderr]     |
[INFO] [stderr] 223 |             self.functionality = functionality.clone();
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `functionality`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let res =`
[INFO] [stderr]    --> src/lib.rs:318:9
[INFO] [stderr]     |
[INFO] [stderr] 318 | /         let res = unsafe {
[INFO] [stderr] 319 | |             i2c::i2c_rdwr(self.as_raw_fd(), &mut message_buffer[..messages.len()])?;
[INFO] [stderr] 320 | |         };
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_unit_value)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/lib.rs:328:12
[INFO] [stderr]     |
[INFO] [stderr] 328 |         Ok(res)
[INFO] [stderr]     |            ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unit_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 328 |         Ok(())
[INFO] [stderr]     |            ^^
[INFO] [stderr] 
[INFO] [stderr] warning: item `Message<'a>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]   --> src/lib.rs:77:1
[INFO] [stderr]    |
[INFO] [stderr] 77 | / impl<'a> Message<'a> {
[INFO] [stderr] 78 | |     /// Byte length of the message data buffer.
[INFO] [stderr] 79 | |     pub fn len(&self) -> usize {
[INFO] [stderr] 80 | |         match *self {
[INFO] [stderr] ...  |
[INFO] [stderr] 92 | |     }
[INFO] [stderr] 93 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/lib.rs:219:29
[INFO] [stderr]     |
[INFO] [stderr] 219 |         if let Some(func) = self.functionality.clone() {
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.functionality`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/lib.rs:223:34
[INFO] [stderr]     |
[INFO] [stderr] 223 |             self.functionality = functionality.clone();
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `functionality`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let res =`
[INFO] [stderr]    --> src/lib.rs:318:9
[INFO] [stderr]     |
[INFO] [stderr] 318 | /         let res = unsafe {
[INFO] [stderr] 319 | |             i2c::i2c_rdwr(self.as_raw_fd(), &mut message_buffer[..messages.len()])?;
[INFO] [stderr] 320 | |         };
[INFO] [stderr]     | |__________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_unit_value)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: passing a unit value to a function
[INFO] [stderr]    --> src/lib.rs:328:12
[INFO] [stderr]     |
[INFO] [stderr] 328 |         Ok(res)
[INFO] [stderr]     |            ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unit_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unit_arg
[INFO] [stderr] help: if you intended to pass a unit value, use a unit literal instead
[INFO] [stderr]     |
[INFO] [stderr] 328 |         Ok(())
[INFO] [stderr]     |            ^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.26s
[INFO] running `"docker" "inspect" "e5b10a163f77189d5e9c433b75da2d9e5c741d3ffae4bf9b0d276bef7533d196"`
[INFO] running `"docker" "rm" "-f" "e5b10a163f77189d5e9c433b75da2d9e5c741d3ffae4bf9b0d276bef7533d196"`
[INFO] [stdout] e5b10a163f77189d5e9c433b75da2d9e5c741d3ffae4bf9b0d276bef7533d196