[INFO] crate lru 0.1.10 is already in cache
[INFO] extracting crate lru 0.1.10 into work/ex/clippy-test-run/sources/stable/reg/lru/0.1.10
[INFO] extracting crate lru 0.1.10 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/lru/0.1.10
[INFO] validating manifest of lru-0.1.10 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 lru-0.1.10 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 lru-0.1.10
[INFO] finished frobbing lru-0.1.10
[INFO] frobbed toml for lru-0.1.10 written to work/ex/clippy-test-run/sources/stable/reg/lru/0.1.10/Cargo.toml
[INFO] started frobbing lru-0.1.10
[INFO] finished frobbing lru-0.1.10
[INFO] frobbed toml for lru-0.1.10 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/lru/0.1.10/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 lru-0.1.10 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/lru/0.1.10:/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] f5bf6799a02646a5ed4da1269a7231dd2b0f322fae0315e5e74129d39cb09c29
[INFO] running `"docker" "start" "-a" "f5bf6799a02646a5ed4da1269a7231dd2b0f322fae0315e5e74129d39cb09c29"`
[INFO] [stderr]     Checking lru v0.1.10 (/opt/crater/workdir)
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/lib.rs:359:5
[INFO] [stderr]     |
[INFO] [stderr] 359 | /     pub fn peek_lru<'a>(&'a self) -> Option<(&'a K, &'a V)> {
[INFO] [stderr] 360 | |         if self.len() == 0 {
[INFO] [stderr] 361 | |             return None;
[INFO] [stderr] 362 | |         }
[INFO] [stderr] ...   |
[INFO] [stderr] 371 | |         Some((key, val))
[INFO] [stderr] 372 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:360:12
[INFO] [stderr]     |
[INFO] [stderr] 360 |         if self.len() == 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lib.rs:552:9
[INFO] [stderr]     |
[INFO] [stderr] 552 | /         loop {
[INFO] [stderr] 553 | |             match self.remove_last() {
[INFO] [stderr] 554 | |                 Some(_) => (),
[INFO] [stderr] 555 | |                 None => break,
[INFO] [stderr] 556 | |             }
[INFO] [stderr] 557 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(_) = self.remove_last() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr] warning: explicit lifetimes given in parameter types where they could be elided (or replaced with `'_` if needed by type declaration)
[INFO] [stderr]    --> src/lib.rs:359:5
[INFO] [stderr]     |
[INFO] [stderr] 359 | /     pub fn peek_lru<'a>(&'a self) -> Option<(&'a K, &'a V)> {
[INFO] [stderr] 360 | |         if self.len() == 0 {
[INFO] [stderr] 361 | |             return None;
[INFO] [stderr] 362 | |         }
[INFO] [stderr] ...   |
[INFO] [stderr] 371 | |         Some((key, val))
[INFO] [stderr] 372 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/lib.rs:360:12
[INFO] [stderr]     |
[INFO] [stderr] 360 |         if self.len() == 0 {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: this loop could be written as a `while let` loop
[INFO] [stderr]    --> src/lib.rs:552:9
[INFO] [stderr]     |
[INFO] [stderr] 552 | /         loop {
[INFO] [stderr] 553 | |             match self.remove_last() {
[INFO] [stderr] 554 | |                 Some(_) => (),
[INFO] [stderr] 555 | |                 None => break,
[INFO] [stderr] 556 | |             }
[INFO] [stderr] 557 | |         }
[INFO] [stderr]     | |_________^ help: try: `while let Some(_) = self.remove_last() { .. }`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::while_let_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `"docker" "inspect" "f5bf6799a02646a5ed4da1269a7231dd2b0f322fae0315e5e74129d39cb09c29"`
[INFO] running `"docker" "rm" "-f" "f5bf6799a02646a5ed4da1269a7231dd2b0f322fae0315e5e74129d39cb09c29"`
[INFO] [stdout] f5bf6799a02646a5ed4da1269a7231dd2b0f322fae0315e5e74129d39cb09c29