[INFO] updating cached repository fabracht/tail_fibonacci_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fabracht/tail_fibonacci_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fabracht/tail_fibonacci_rust" "work/ex/clippy-test-run/sources/stable/gh/fabracht/tail_fibonacci_rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/fabracht/tail_fibonacci_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fabracht/tail_fibonacci_rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/fabracht/tail_fibonacci_rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/fabracht/tail_fibonacci_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2f954b305c4f0b627c9b8de28c3f237d7b6a4a8b
[INFO] sha for GitHub repo fabracht/tail_fibonacci_rust: 2f954b305c4f0b627c9b8de28c3f237d7b6a4a8b
[INFO] validating manifest of fabracht/tail_fibonacci_rust 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 fabracht/tail_fibonacci_rust 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 fabracht/tail_fibonacci_rust
[INFO] finished frobbing fabracht/tail_fibonacci_rust
[INFO] frobbed toml for fabracht/tail_fibonacci_rust written to work/ex/clippy-test-run/sources/stable/gh/fabracht/tail_fibonacci_rust/Cargo.toml
[INFO] started frobbing fabracht/tail_fibonacci_rust
[INFO] finished frobbing fabracht/tail_fibonacci_rust
[INFO] frobbed toml for fabracht/tail_fibonacci_rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/fabracht/tail_fibonacci_rust/Cargo.toml
[INFO] crate fabracht/tail_fibonacci_rust has a lockfile. skipping
[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 fabracht/tail_fibonacci_rust against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/fabracht/tail_fibonacci_rust:/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 -Dclippy::into_iter_on_array" "-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] 7866a07470dab5b9836f68532e92630a67e0faf6668de53dcf7711ac9100c9c4
[INFO] running `"docker" "start" "-a" "7866a07470dab5b9836f68532e92630a67e0faf6668de53dcf7711ac9100c9c4"`
[INFO] [stderr]     Checking tail_fibonacci v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     return helper_fib(n - 1, b, a+b);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `helper_fib(n - 1, b, a+b)`
[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/main.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     return helper_fib(n - 1, b, a+b);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `helper_fib(n - 1, b, a+b)`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `"docker" "inspect" "7866a07470dab5b9836f68532e92630a67e0faf6668de53dcf7711ac9100c9c4"`
[INFO] running `"docker" "rm" "-f" "7866a07470dab5b9836f68532e92630a67e0faf6668de53dcf7711ac9100c9c4"`
[INFO] [stdout] 7866a07470dab5b9836f68532e92630a67e0faf6668de53dcf7711ac9100c9c4