[INFO] crate fp_rust 0.1.39 is already in cache
[INFO] extracting crate fp_rust 0.1.39 into work/ex/clippy-test-run/sources/stable/reg/fp_rust/0.1.39
[INFO] extracting crate fp_rust 0.1.39 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/fp_rust/0.1.39
[INFO] validating manifest of fp_rust-0.1.39 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 fp_rust-0.1.39 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 fp_rust-0.1.39
[INFO] finished frobbing fp_rust-0.1.39
[INFO] frobbed toml for fp_rust-0.1.39 written to work/ex/clippy-test-run/sources/stable/reg/fp_rust/0.1.39/Cargo.toml
[INFO] started frobbing fp_rust-0.1.39
[INFO] finished frobbing fp_rust-0.1.39
[INFO] frobbed toml for fp_rust-0.1.39 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/fp_rust/0.1.39/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 fp_rust-0.1.39 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-7/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/fp_rust/0.1.39:/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] ff3566a2278b4c16328f23cabee6b6efc266a2ed2c97f2255be1a7ab0b133478
[INFO] running `"docker" "start" "-a" "ff3566a2278b4c16328f23cabee6b6efc266a2ed2c97f2255be1a7ab0b133478"`
[INFO] [stderr]     Checking fp_rust v0.1.39 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/fp.rs:240:17
[INFO] [stderr]     |
[INFO] [stderr] 240 |                 return a;
[INFO] [stderr]     |                 ^^^^^^^^^ help: remove `return` as shown: `a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/fp.rs:257:17
[INFO] [stderr]     |
[INFO] [stderr] 257 |                 return a;
[INFO] [stderr]     |                 ^^^^^^^^^ help: remove `return` as shown: `a`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/maybe.rs:153:23
[INFO] [stderr]     |
[INFO] [stderr] 153 |             .fmap(|x| return Maybe::val(!x.unwrap()))
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Maybe::val(!x.unwrap())`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/maybe.rs:159:23
[INFO] [stderr]     |
[INFO] [stderr] 159 |             .fmap(|x| return Maybe::val(!x.unwrap()))
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Maybe::val(!x.unwrap())`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/maybe.rs:165:34
[INFO] [stderr]     |
[INFO] [stderr] 165 |         Maybe::val(true).map(|x| return Some(!x.unwrap())).unwrap()
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(!x.unwrap())`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/maybe.rs:169:35
[INFO] [stderr]     |
[INFO] [stderr] 169 |         Maybe::val(false).map(|x| return Some(!x.unwrap())).unwrap()
[INFO] [stderr]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(!x.unwrap())`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/maybe.rs:176:17
[INFO] [stderr]     |
[INFO] [stderr] 176 |                 return Some(true);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(true)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/maybe.rs:178:17
[INFO] [stderr]     |
[INFO] [stderr] 178 |                 return Some(false);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(false)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/fp.rs:150:5
[INFO] [stderr]     |
[INFO] [stderr] 150 |     v.into_iter().filter(f).into_iter().collect::<Vec<T>>()
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `v.into_iter().filter(f)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter_mut() and will not move the Vec
[INFO] [stderr]   --> src/common.rs:80:24
[INFO] [stderr]    |
[INFO] [stderr] 80 |     for (i, elem) in v.into_iter().enumerate() {
[INFO] [stderr]    |                        ^^^^^^^^^ help: call directly: `iter_mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/fp.rs:150:5
[INFO] [stderr]     |
[INFO] [stderr] 150 |     v.into_iter().filter(f).into_iter().collect::<Vec<T>>()
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into_iter()`: `v.into_iter().filter(f)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: this .into_iter() call is equivalent to .iter_mut() and will not move the Vec
[INFO] [stderr]   --> src/common.rs:80:24
[INFO] [stderr]    |
[INFO] [stderr] 80 |     for (i, elem) in v.into_iter().enumerate() {
[INFO] [stderr]    |                        ^^^^^^^^^ help: call directly: `iter_mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::into_iter_on_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `"docker" "inspect" "ff3566a2278b4c16328f23cabee6b6efc266a2ed2c97f2255be1a7ab0b133478"`
[INFO] running `"docker" "rm" "-f" "ff3566a2278b4c16328f23cabee6b6efc266a2ed2c97f2255be1a7ab0b133478"`
[INFO] [stdout] ff3566a2278b4c16328f23cabee6b6efc266a2ed2c97f2255be1a7ab0b133478