[INFO] crate pcf8591 0.1.1 is already in cache
[INFO] extracting crate pcf8591 0.1.1 into work/ex/clippy-test-run/sources/stable/reg/pcf8591/0.1.1
[INFO] extracting crate pcf8591 0.1.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/pcf8591/0.1.1
[INFO] validating manifest of pcf8591-0.1.1 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 pcf8591-0.1.1 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 pcf8591-0.1.1
[INFO] finished frobbing pcf8591-0.1.1
[INFO] frobbed toml for pcf8591-0.1.1 written to work/ex/clippy-test-run/sources/stable/reg/pcf8591/0.1.1/Cargo.toml
[INFO] started frobbing pcf8591-0.1.1
[INFO] finished frobbing pcf8591-0.1.1
[INFO] frobbed toml for pcf8591-0.1.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/pcf8591/0.1.1/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 pcf8591-0.1.1 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/pcf8591/0.1.1:/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] 7c80b7d4b1f88a95c598534e1d28bb2d735e83813811efa621077bf8ff642ea5
[INFO] running `"docker" "start" "-a" "7c80b7d4b1f88a95c598534e1d28bb2d735e83813811efa621077bf8ff642ea5"`
[INFO] [stderr]    Compiling i2cdev v0.3.2
[INFO] [stderr]     Checking pcf8591 v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/lib.rs:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 i2c: i2c, 
[INFO] [stderr]    |                 ^^^^^^^^ help: replace it with: `i2c`
[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:67:17
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 i2c: i2c, 
[INFO] [stderr]    |                 ^^^^^^^^ help: replace it with: `i2c`
[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: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/lib.rs:88:17
[INFO] [stderr]    |
[INFO] [stderr] 88 |                 let _ = try!(self.i2c.smbus_write_byte(control_byte));
[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: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:102:22
[INFO] [stderr]     |
[INFO] [stderr] 102 |             .map(|b| b as f64  * self.v_lsb)
[INFO] [stderr]     |                      ^^^^^^^^ help: try: `f64::from(b)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/lib.rs:88:17
[INFO] [stderr]    |
[INFO] [stderr] 88 |                 let _ = try!(self.i2c.smbus_write_byte(control_byte));
[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: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:102:22
[INFO] [stderr]     |
[INFO] [stderr] 102 |             .map(|b| b as f64  * self.v_lsb)
[INFO] [stderr]     |                      ^^^^^^^^ help: try: `f64::from(b)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.10s
[INFO] running `"docker" "inspect" "7c80b7d4b1f88a95c598534e1d28bb2d735e83813811efa621077bf8ff642ea5"`
[INFO] running `"docker" "rm" "-f" "7c80b7d4b1f88a95c598534e1d28bb2d735e83813811efa621077bf8ff642ea5"`
[INFO] [stdout] 7c80b7d4b1f88a95c598534e1d28bb2d735e83813811efa621077bf8ff642ea5