[INFO] updating cached repository amitdash291/rust_lifetimes [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/amitdash291/rust_lifetimes [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/amitdash291/rust_lifetimes" "work/ex/clippy-test-run/sources/stable/gh/amitdash291/rust_lifetimes"` [INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/amitdash291/rust_lifetimes'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/amitdash291/rust_lifetimes" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/amitdash291/rust_lifetimes"` [INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/amitdash291/rust_lifetimes'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 1de31b9f2321d84ba42e1c3319e2142917794fe9 [INFO] sha for GitHub repo amitdash291/rust_lifetimes: 1de31b9f2321d84ba42e1c3319e2142917794fe9 [INFO] validating manifest of amitdash291/rust_lifetimes 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 amitdash291/rust_lifetimes 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 amitdash291/rust_lifetimes [INFO] finished frobbing amitdash291/rust_lifetimes [INFO] frobbed toml for amitdash291/rust_lifetimes written to work/ex/clippy-test-run/sources/stable/gh/amitdash291/rust_lifetimes/Cargo.toml [INFO] started frobbing amitdash291/rust_lifetimes [INFO] finished frobbing amitdash291/rust_lifetimes [INFO] frobbed toml for amitdash291/rust_lifetimes written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/amitdash291/rust_lifetimes/Cargo.toml [INFO] crate amitdash291/rust_lifetimes 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 amitdash291/rust_lifetimes 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/gh/amitdash291/rust_lifetimes:/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] a258f36dcf4b1de18df09beb000c20cbea03ed1e80fc02f6fba026ed8b561f0c [INFO] running `"docker" "start" "-a" "a258f36dcf4b1de18df09beb000c20cbea03ed1e80fc02f6fba026ed8b561f0c"` [INFO] [stderr] Checking lifetime_demo v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable `result_ref` is assigned to, but never used [INFO] [stderr] --> src/main.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let result_ref; [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] = note: consider using `_result_ref` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `result_ref` is never read [INFO] [stderr] --> src/main.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | result_ref = which_is_greater(&a, &b) [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_assignments)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/main.rs:25:29 [INFO] [stderr] | [INFO] [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 { [INFO] [stderr] | ^ help: consider using `_a` instead [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/main.rs:25:41 [INFO] [stderr] | [INFO] [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 { [INFO] [stderr] | ^ help: consider using `_b` instead [INFO] [stderr] [INFO] [stderr] warning: unused variable: `vec1` [INFO] [stderr] --> src/main.rs:37:13 [INFO] [stderr] | [INFO] [stderr] 37 | let mut vec1: Vec = Vec::new(); [INFO] [stderr] | ^^^^ help: consider using `_vec1` instead [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:37:9 [INFO] [stderr] | [INFO] [stderr] 37 | let mut vec1: Vec = Vec::new(); [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test_mut_ref` [INFO] [stderr] --> src/main.rs:34:1 [INFO] [stderr] | [INFO] [stderr] 34 | fn test_mut_ref() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `copy_vec` [INFO] [stderr] --> src/main.rs:40:1 [INFO] [stderr] | [INFO] [stderr] 40 | fn copy_vec(from: &Vec, to: &mut Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. [INFO] [stderr] --> src/main.rs:40:19 [INFO] [stderr] | [INFO] [stderr] 40 | fn copy_vec(from: &Vec, to: &mut Vec) { [INFO] [stderr] | ^^^^^^^^^ help: change this to: `&[i32]` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::ptr_arg)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg [INFO] [stderr] [INFO] [stderr] warning: variable `result_ref` is assigned to, but never used [INFO] [stderr] --> src/main.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let result_ref; [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_variables)] on by default [INFO] [stderr] = note: consider using `_result_ref` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `result_ref` is never read [INFO] [stderr] --> src/main.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | result_ref = which_is_greater(&a, &b) [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_assignments)] on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/main.rs:25:29 [INFO] [stderr] | [INFO] [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 { [INFO] [stderr] | ^ help: consider using `_a` instead [INFO] [stderr] [INFO] [stderr] warning: unused variable: `b` [INFO] [stderr] --> src/main.rs:25:41 [INFO] [stderr] | [INFO] [stderr] 25 | fn which_is_greater<'a, 'b>(a: &'a i32, b: &'b i32) -> &'b i32 { [INFO] [stderr] | ^ help: consider using `_b` instead [INFO] [stderr] [INFO] [stderr] warning: unused variable: `vec1` [INFO] [stderr] --> src/main.rs:37:13 [INFO] [stderr] | [INFO] [stderr] 37 | let mut vec1: Vec = Vec::new(); [INFO] [stderr] | ^^^^ help: consider using `_vec1` instead [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:37:9 [INFO] [stderr] | [INFO] [stderr] 37 | let mut vec1: Vec = Vec::new(); [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test_mut_ref` [INFO] [stderr] --> src/main.rs:34:1 [INFO] [stderr] | [INFO] [stderr] 34 | fn test_mut_ref() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `copy_vec` [INFO] [stderr] --> src/main.rs:40:1 [INFO] [stderr] | [INFO] [stderr] 40 | fn copy_vec(from: &Vec, to: &mut Vec) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. [INFO] [stderr] --> src/main.rs:40:19 [INFO] [stderr] | [INFO] [stderr] 40 | fn copy_vec(from: &Vec, to: &mut Vec) { [INFO] [stderr] | ^^^^^^^^^ help: change this to: `&[i32]` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::ptr_arg)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.86s [INFO] running `"docker" "inspect" "a258f36dcf4b1de18df09beb000c20cbea03ed1e80fc02f6fba026ed8b561f0c"` [INFO] running `"docker" "rm" "-f" "a258f36dcf4b1de18df09beb000c20cbea03ed1e80fc02f6fba026ed8b561f0c"` [INFO] [stdout] a258f36dcf4b1de18df09beb000c20cbea03ed1e80fc02f6fba026ed8b561f0c