[INFO] crate rusty-fork 0.2.1 is already in cache
[INFO] extracting crate rusty-fork 0.2.1 into work/ex/clippy-test-run/sources/stable/reg/rusty-fork/0.2.1
[INFO] extracting crate rusty-fork 0.2.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rusty-fork/0.2.1
[INFO] validating manifest of rusty-fork-0.2.1 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 rusty-fork-0.2.1 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 rusty-fork-0.2.1
[INFO] finished frobbing rusty-fork-0.2.1
[INFO] frobbed toml for rusty-fork-0.2.1 written to work/ex/clippy-test-run/sources/stable/reg/rusty-fork/0.2.1/Cargo.toml
[INFO] started frobbing rusty-fork-0.2.1
[INFO] finished frobbing rusty-fork-0.2.1
[INFO] frobbed toml for rusty-fork-0.2.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/rusty-fork/0.2.1/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 rusty-fork-0.2.1 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/rusty-fork/0.2.1:/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] 5fadd8c9e95a7dd4ab6a551fd9071bbeffcdde36ed6797708cf5c04f49dbe98f
[INFO] running `"docker" "start" "-a" "5fadd8c9e95a7dd4ab6a551fd9071bbeffcdde36ed6797708cf5c04f49dbe98f"`
[INFO] [stderr]     Checking rusty-fork v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/cmdline.rs:145:43
[INFO] [stderr]     |
[INFO] [stderr] 145 |                 } else if arg.starts_with("-") {
[INFO] [stderr]     |                                           ^^^ help: try using a char instead: `'-'`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let ret =`
[INFO] [stderr]    --> src/fork.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |         let ret = in_parent(&mut child.0, &mut child.1);
[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/fork.rs:190:12
[INFO] [stderr]     |
[INFO] [stderr] 190 |         Ok(ret)
[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] 190 |         Ok(())
[INFO] [stderr]     |            ^^
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/child_wrapper.rs:48:20
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn success(&self) -> bool {
[INFO] [stderr]    |                    ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/child_wrapper.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn code(&self) -> Option<i32> {
[INFO] [stderr]    |                 ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/child_wrapper.rs:77:24
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn unix_signal(&self) -> Option<i32> {
[INFO] [stderr]    |                        ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]    --> src/cmdline.rs:145:43
[INFO] [stderr]     |
[INFO] [stderr] 145 |                 } else if arg.starts_with("-") {
[INFO] [stderr]     |                                           ^^^ help: try using a char instead: `'-'`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let ret =`
[INFO] [stderr]    --> src/fork.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |         let ret = in_parent(&mut child.0, &mut child.1);
[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/fork.rs:190:12
[INFO] [stderr]     |
[INFO] [stderr] 190 |         Ok(ret)
[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] 190 |         Ok(())
[INFO] [stderr]     |            ^^
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/child_wrapper.rs:48:20
[INFO] [stderr]    |
[INFO] [stderr] 48 |     pub fn success(&self) -> bool {
[INFO] [stderr]    |                    ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/child_wrapper.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn code(&self) -> Option<i32> {
[INFO] [stderr]    |                 ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/child_wrapper.rs:77:24
[INFO] [stderr]    |
[INFO] [stderr] 77 |     pub fn unix_signal(&self) -> Option<i32> {
[INFO] [stderr]    |                        ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `"docker" "inspect" "5fadd8c9e95a7dd4ab6a551fd9071bbeffcdde36ed6797708cf5c04f49dbe98f"`
[INFO] running `"docker" "rm" "-f" "5fadd8c9e95a7dd4ab6a551fd9071bbeffcdde36ed6797708cf5c04f49dbe98f"`
[INFO] [stdout] 5fadd8c9e95a7dd4ab6a551fd9071bbeffcdde36ed6797708cf5c04f49dbe98f