[INFO] cloning repository https://github.com/Zapix/leetcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Zapix/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZapix%2Fleetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZapix%2Fleetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d75a70405ecb4306869f1fa4852d562c818e829e
[INFO] checking Zapix/leetcode-rust against 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa for pr-159356
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZapix%2Fleetcode-rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Zapix/leetcode-rust
[INFO] finished tweaking git repo https://github.com/Zapix/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/Zapix/leetcode-rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Zapix/leetcode-rust on toolchain 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Zapix/leetcode-rust 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" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking Zapix/leetcode-rust against 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa for pr-159356
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZapix%2Fleetcode-rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Zapix/leetcode-rust
[INFO] finished tweaking git repo https://github.com/Zapix/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/Zapix/leetcode-rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Zapix/leetcode-rust on toolchain 6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Zapix/leetcode-rust 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" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "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-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c36f533e8924a726b63f9d01e781fa8c8c28c96d1d595403829afb31452ee0f5" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 76cc107571c031b4adbefdd08c3c18b378d80a9be454ec9c362221885ec5ff9e
[INFO] running `Command { std: "docker" "start" "76cc107571c031b4adbefdd08c3c18b378d80a9be454ec9c362221885ec5ff9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76cc107571c031b4adbefdd08c3c18b378d80a9be454ec9c362221885ec5ff9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "76cc107571c031b4adbefdd08c3c18b378d80a9be454ec9c362221885ec5ff9e" "/opt/rustwide/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76cc107571c031b4adbefdd08c3c18b378d80a9be454ec9c362221885ec5ff9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "76cc107571c031b4adbefdd08c3c18b378d80a9be454ec9c362221885ec5ff9e" "/opt/rustwide/cargo-home/bin/cargo" "+6e4b95ed0735c3bbfb308e6f158f479b4d14f1aa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/problems/maximum_frequency_after_performing_operations_1.rs:16:20
[INFO] [stdout]    |
[INFO] [stdout] 16 |         for num in (*nums.first().unwrap_or(&0)..(*nums.last().unwrap_or(&0) + 1)) {
[INFO] [stdout]    |                    ^                                                             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -         for num in (*nums.first().unwrap_or(&0)..(*nums.last().unwrap_or(&0) + 1)) {
[INFO] [stdout] 16 +         for num in *nums.first().unwrap_or(&0)..(*nums.last().unwrap_or(&0) + 1) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> src/problems/maximum_number_of_events_that_can_be_attended_ii.rs:18:52
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 let j = events.partition_point(|e| (e[0] <= events[x][1]));
[INFO] [stdout]    |                                                    ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 18 -                 let j = events.partition_point(|e| (e[0] <= events[x][1]));
[INFO] [stdout] 18 +                 let j = events.partition_point(|e| e[0] <= events[x][1]);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/problems/sum_of_k_mirror_numbers.rs:31:42
[INFO] [stdout]    |
[INFO] [stdout] 31 |             if self.num >= self.base.pow((self.length as u32)) {
[INFO] [stdout]    |                                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 31 -             if self.num >= self.base.pow((self.length as u32)) {
[INFO] [stdout] 31 +             if self.num >= self.base.pow(self.length as u32) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> src/problems/take_gifts_from_the_richest_pile.rs:13:29
[INFO] [stdout]    |
[INFO] [stdout] 13 |         heap.iter().map(|x| (*x as i64)).sum()
[INFO] [stdout]    |                             ^         ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 13 -         heap.iter().map(|x| (*x as i64)).sum()
[INFO] [stdout] 13 +         heap.iter().map(|x| *x as i64).sum()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> src/problems/maximum_frequency_after_performing_operations_1.rs:16:20
[INFO] [stdout]    |
[INFO] [stdout] 16 |         for num in (*nums.first().unwrap_or(&0)..(*nums.last().unwrap_or(&0) + 1)) {
[INFO] [stdout]    |                    ^                                                             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -         for num in (*nums.first().unwrap_or(&0)..(*nums.last().unwrap_or(&0) + 1)) {
[INFO] [stdout] 16 +         for num in *nums.first().unwrap_or(&0)..(*nums.last().unwrap_or(&0) + 1) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> src/problems/maximum_number_of_events_that_can_be_attended_ii.rs:18:52
[INFO] [stdout]    |
[INFO] [stdout] 18 |                 let j = events.partition_point(|e| (e[0] <= events[x][1]));
[INFO] [stdout]    |                                                    ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 18 -                 let j = events.partition_point(|e| (e[0] <= events[x][1]));
[INFO] [stdout] 18 +                 let j = events.partition_point(|e| e[0] <= events[x][1]);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/problems/sum_of_k_mirror_numbers.rs:31:42
[INFO] [stdout]    |
[INFO] [stdout] 31 |             if self.num >= self.base.pow((self.length as u32)) {
[INFO] [stdout]    |                                          ^                  ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 31 -             if self.num >= self.base.pow((self.length as u32)) {
[INFO] [stdout] 31 +             if self.num >= self.base.pow(self.length as u32) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around closure body
[INFO] [stdout]   --> src/problems/take_gifts_from_the_richest_pile.rs:13:29
[INFO] [stdout]    |
[INFO] [stdout] 13 |         heap.iter().map(|x| (*x as i64)).sum()
[INFO] [stdout]    |                             ^         ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 13 -         heap.iter().map(|x| (*x as i64)).sum()
[INFO] [stdout] 13 +         heap.iter().map(|x| *x as i64).sum()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/problems/find_the_k_th_character_in_string_game_ii.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn kth_character(mut k: i64, mut operations: Vec<i32>) -> char {
[INFO] [stdout]   |                          ----^
[INFO] [stdout]   |                          |
[INFO] [stdout]   |                          help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/problems/longest_harmonious_subsequence.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub fn find_lhs(mut nums: Vec<i32>) -> i32 {
[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/problems/maximum_number_of_distinct_elements_after_operations.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let mut freq_map = nums.iter().fold(BTreeMap::new(), |mut acc, &num| {
[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/problems/maximum_number_of_events_that_can_be_attended.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         let mut max_day = events.iter().map(|x| x[1]).max().unwrap_or(0);
[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/problems/ones_and_zeros.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let mut values = strs
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]  --> src/problems/power_grid_maintenance.rs:5:24
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub fn build_graph(c: usize, connections: &Vec<Vec<i32>>) -> HashMap<usize, HashSet<usize>> {
[INFO] [stdout]   |                        ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/problems/power_grid_maintenance.rs:61:29
[INFO] [stdout]    |
[INFO] [stdout] 61 |                         let mut value = match groups[group_idx].first(){
[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/problems/find_the_k_th_character_in_string_game_ii.rs:4:26
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn kth_character(mut k: i64, mut operations: Vec<i32>) -> char {
[INFO] [stdout]   |                          ----^
[INFO] [stdout]   |                          |
[INFO] [stdout]   |                          help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/problems/longest_harmonious_subsequence.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub fn find_lhs(mut nums: Vec<i32>) -> i32 {
[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/problems/maximum_number_of_distinct_elements_after_operations.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let mut freq_map = nums.iter().fold(BTreeMap::new(), |mut acc, &num| {
[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/problems/maximum_number_of_events_that_can_be_attended.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         let mut max_day = events.iter().map(|x| x[1]).max().unwrap_or(0);
[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/problems/ones_and_zeros.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let mut values = strs
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]  --> src/problems/power_grid_maintenance.rs:5:24
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub fn build_graph(c: usize, connections: &Vec<Vec<i32>>) -> HashMap<usize, HashSet<usize>> {
[INFO] [stdout]   |                        ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/problems/power_grid_maintenance.rs:61:29
[INFO] [stdout]    |
[INFO] [stdout] 61 |                         let mut value = match groups[group_idx].first(){
[INFO] [stdout]    |                             ----^^^^^
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.79s
[INFO] running `Command { std: "docker" "inspect" "76cc107571c031b4adbefdd08c3c18b378d80a9be454ec9c362221885ec5ff9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76cc107571c031b4adbefdd08c3c18b378d80a9be454ec9c362221885ec5ff9e", kill_on_drop: false }`
[INFO] [stdout] 76cc107571c031b4adbefdd08c3c18b378d80a9be454ec9c362221885ec5ff9e
