[INFO] crate webbrowser 0.3.1 is already in cache
[INFO] extracting crate webbrowser 0.3.1 into work/ex/clippy-test-run/sources/stable/reg/webbrowser/0.3.1
[INFO] extracting crate webbrowser 0.3.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/webbrowser/0.3.1
[INFO] validating manifest of webbrowser-0.3.1 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 webbrowser-0.3.1 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 webbrowser-0.3.1
[INFO] finished frobbing webbrowser-0.3.1
[INFO] frobbed toml for webbrowser-0.3.1 written to work/ex/clippy-test-run/sources/stable/reg/webbrowser/0.3.1/Cargo.toml
[INFO] started frobbing webbrowser-0.3.1
[INFO] finished frobbing webbrowser-0.3.1
[INFO] frobbed toml for webbrowser-0.3.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/webbrowser/0.3.1/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 webbrowser-0.3.1 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/webbrowser/0.3.1:/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] 68c3745083af33abd81acedc71da78c46b905fc371417db77486a53bf0bfb7d4
[INFO] running `"docker" "start" "-a" "68c3745083af33abd81acedc71da78c46b905fc371417db77486a53bf0bfb7d4"`
[INFO] [stderr]     Checking webbrowser v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:236:5
[INFO] [stderr]     |
[INFO] [stderr] 236 | /     return Err(Error::new(
[INFO] [stderr] 237 | |         ErrorKind::NotFound,
[INFO] [stderr] 238 | |         "No valid command in $BROWSER",
[INFO] [stderr] 239 | |     ));
[INFO] [stderr]     | |_______^
[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] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 236 |     Err(Error::new(
[INFO] [stderr] 237 |         ErrorKind::NotFound,
[INFO] [stderr] 238 |         "No valid command in $BROWSER",
[INFO] [stderr] 239 |     ))
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:212:65
[INFO] [stderr]     |
[INFO] [stderr] 212 |         .map_err(|_| -> Error { Error::new(ErrorKind::NotFound, format!("BROWSER env not set")) })?;
[INFO] [stderr]     |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"BROWSER env not set".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/lib.rs:236:5
[INFO] [stderr]     |
[INFO] [stderr] 236 | /     return Err(Error::new(
[INFO] [stderr] 237 | |         ErrorKind::NotFound,
[INFO] [stderr] 238 | |         "No valid command in $BROWSER",
[INFO] [stderr] 239 | |     ));
[INFO] [stderr]     | |_______^
[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] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 236 |     Err(Error::new(
[INFO] [stderr] 237 |         ErrorKind::NotFound,
[INFO] [stderr] 238 |         "No valid command in $BROWSER",
[INFO] [stderr] 239 |     ))
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/lib.rs:212:65
[INFO] [stderr]     |
[INFO] [stderr] 212 |         .map_err(|_| -> Error { Error::new(ErrorKind::NotFound, format!("BROWSER env not set")) })?;
[INFO] [stderr]     |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"BROWSER env not set".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `"docker" "inspect" "68c3745083af33abd81acedc71da78c46b905fc371417db77486a53bf0bfb7d4"`
[INFO] running `"docker" "rm" "-f" "68c3745083af33abd81acedc71da78c46b905fc371417db77486a53bf0bfb7d4"`
[INFO] [stdout] 68c3745083af33abd81acedc71da78c46b905fc371417db77486a53bf0bfb7d4