[INFO] cloning repository https://github.com/shashankbrgowda/coding-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shashankbrgowda/coding-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshashankbrgowda%2Fcoding-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshashankbrgowda%2Fcoding-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3fad1c3e34fcd8d69bf7fd7f313e87ffafbf495e
[INFO] checking shashankbrgowda/coding-rs against master#3350c1eb3fd8fe1bee1ed4c76944d707bd256876 for pr-140558
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshashankbrgowda%2Fcoding-rs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shashankbrgowda/coding-rs on toolchain 3350c1eb3fd8fe1bee1ed4c76944d707bd256876
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shashankbrgowda/coding-rs
[INFO] finished tweaking git repo https://github.com/shashankbrgowda/coding-rs
[INFO] tweaked toml for git repo https://github.com/shashankbrgowda/coding-rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/shashankbrgowda/coding-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6823d525ac1ed4b58d34b90b3938df2926dac7ab5eaf16f4af8c8ce3f366aebb
[INFO] running `Command { std: "docker" "start" "-a" "6823d525ac1ed4b58d34b90b3938df2926dac7ab5eaf16f4af8c8ce3f366aebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6823d525ac1ed4b58d34b90b3938df2926dac7ab5eaf16f4af8c8ce3f366aebb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6823d525ac1ed4b58d34b90b3938df2926dac7ab5eaf16f4af8c8ce3f366aebb", kill_on_drop: false }`
[INFO] [stdout] 6823d525ac1ed4b58d34b90b3938df2926dac7ab5eaf16f4af8c8ce3f366aebb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b38a712f39d9cb02dbea354c57a13c842d518bc50abdb5e466ee990f683d790
[INFO] running `Command { std: "docker" "start" "-a" "7b38a712f39d9cb02dbea354c57a13c842d518bc50abdb5e466ee990f683d790", kill_on_drop: false }`
[INFO] [stderr]     Checking coding-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/array/topk_freq_eles.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/array/topk_freq_eles.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/array/topk_freq_eles.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let mut v = map.entry(ele).or_insert(0);
[INFO] [stdout]   |             ----^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |             let mut r_val: &mut HashSet<char> = row.entry(r).or_insert(HashSet::new());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |             let mut c_val: &mut HashSet<char> = col.entry(c).or_insert(HashSet::new());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:26:17
[INFO] [stdout]    |
[INFO] [stdout] 26 |             let mut cube_val: &mut HashSet<char> = cubes.entry((c/3) + cube).or_insert(HashSet::new());
[INFO] [stdout]    |                 ----^^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let mut r_val: &mut Vec<char> = row.entry(r).or_insert(Vec::new());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:51:17
[INFO] [stdout]    |
[INFO] [stdout] 51 |             let mut c_val: &mut Vec<char> = col.entry(c).or_insert(Vec::new());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |             let mut cube_val: &mut Vec<char> = cubes.entry((c/3) + cube).or_insert(Vec::new());
[INFO] [stdout]    |                 ----^^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/array/topk_freq_eles.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let mut v = map.entry(ele).or_insert(0);
[INFO] [stdout]   |             ----^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |             let mut r_val: &mut HashSet<char> = row.entry(r).or_insert(HashSet::new());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |             let mut c_val: &mut HashSet<char> = col.entry(c).or_insert(HashSet::new());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:26:17
[INFO] [stdout]    |
[INFO] [stdout] 26 |             let mut cube_val: &mut HashSet<char> = cubes.entry((c/3) + cube).or_insert(HashSet::new());
[INFO] [stdout]    |                 ----^^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/array/arr_product_except_itself.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let N: usize = nums.len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:49:17
[INFO] [stdout]    |
[INFO] [stdout] 49 |             let mut r_val: &mut Vec<char> = row.entry(r).or_insert(Vec::new());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:51:17
[INFO] [stdout]    |
[INFO] [stdout] 51 |             let mut c_val: &mut Vec<char> = col.entry(c).or_insert(Vec::new());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:53:17
[INFO] [stdout]    |
[INFO] [stdout] 53 |             let mut cube_val: &mut Vec<char> = cubes.entry((c/3) + cube).or_insert(Vec::new());
[INFO] [stdout]    |                 ----^^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `contains_duplicate` is never used
[INFO] [stdout]  --> src/array/contains_duplicate.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn contains_duplicate(nums: Vec<i32>) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `valid_anagram` is never used
[INFO] [stdout]  --> src/array/valid_anagram.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn valid_anagram(s1: String, s2: String) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum` is never used
[INFO] [stdout]   --> src/array/two_sum.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn two_sum(arr: Vec<i32>, target: i32) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `grouped_anagram` is never used
[INFO] [stdout]   --> src/array/grouped_anagram.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn grouped_anagram(strs: Vec<String>) -> Vec<Vec<String>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `topk_freq_eles` is never used
[INFO] [stdout]  --> src/array/topk_freq_eles.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn topk_freq_eles(eles: Vec<i32>, k: i32) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `arr_product_except_itself` is never used
[INFO] [stdout]   --> src/array/arr_product_except_itself.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn arr_product_except_itself(nums: Vec<i32>) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_valid_sudoku` is never used
[INFO] [stdout]  --> src/array/is_valid_sudoku.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn is_valid_sudoku(board: &Vec<Vec<char>>) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_valid_sudoku_brute_force` is never used
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn is_valid_sudoku_brute_force(board: &Vec<Vec<char>>) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_duplicate` is never used
[INFO] [stdout]   --> src/array/is_valid_sudoku.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn check_duplicate(map: &HashMap<usize, Vec<char>>) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_consecutive_subsequence` is never used
[INFO] [stdout]  --> src/array/longest_consecutive_subsequence.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn longest_consecutive_subsequence(nums: Vec<i32>) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/array/arr_product_except_itself.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let N: usize = nums.len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "7b38a712f39d9cb02dbea354c57a13c842d518bc50abdb5e466ee990f683d790", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b38a712f39d9cb02dbea354c57a13c842d518bc50abdb5e466ee990f683d790", kill_on_drop: false }`
[INFO] [stdout] 7b38a712f39d9cb02dbea354c57a13c842d518bc50abdb5e466ee990f683d790
