[INFO] cloning repository https://github.com/Vanderkast/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/Vanderkast/leetcode_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVanderkast%2Fleetcode_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVanderkast%2Fleetcode_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6f30abf9e97ec92ec1e17d4a078efac0819aef2e
[INFO] building Vanderkast/leetcode_rust against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVanderkast%2Fleetcode_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Vanderkast/leetcode_rust on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Vanderkast/leetcode_rust
[INFO] finished tweaking git repo https://github.com/Vanderkast/leetcode_rust
[INFO] tweaked toml for git repo https://github.com/Vanderkast/leetcode_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Vanderkast/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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4179c1381bfde32838a39d03172ef4b95057e0268e306c712e9fc0cc93f6da6d
[INFO] running `Command { std: "docker" "start" "-a" "4179c1381bfde32838a39d03172ef4b95057e0268e306c712e9fc0cc93f6da6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4179c1381bfde32838a39d03172ef4b95057e0268e306c712e9fc0cc93f6da6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4179c1381bfde32838a39d03172ef4b95057e0268e306c712e9fc0cc93f6da6d", kill_on_drop: false }`
[INFO] [stdout] 4179c1381bfde32838a39d03172ef4b95057e0268e306c712e9fc0cc93f6da6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0193be30d07c2db434d7393086877d112b12c80c2a2cee4610bf09a6403cd4a3
[INFO] running `Command { std: "docker" "start" "-a" "0193be30d07c2db434d7393086877d112b12c80c2a2cee4610bf09a6403cd4a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.103
[INFO] [stderr]    Compiling biwise_and_range v0.1.0 (/opt/rustwide/workdir/biwise_and_range)
[INFO] [stderr]    Compiling find_town_judge v0.1.0 (/opt/rustwide/workdir/find_town_judge)
[INFO] [stderr]    Compiling island_perimeter v0.1.0 (/opt/rustwide/workdir/island_perimeter)
[INFO] [stderr]    Compiling find_star_graph_center v0.1.0 (/opt/rustwide/workdir/find_star_graph_center)
[INFO] [stderr]    Compiling longest_str_no_repeat v0.1.0 (/opt/rustwide/workdir/longest_str_no_repeat)
[INFO] [stderr]    Compiling perfect_squares v0.1.0 (/opt/rustwide/workdir/perfect_squares)
[INFO] [stderr]    Compiling word_search v0.1.0 (/opt/rustwide/workdir/word_search)
[INFO] [stderr]    Compiling best_time_but_sell v0.1.0 (/opt/rustwide/workdir/best_time_but_sell)
[INFO] [stderr]    Compiling valid_parentheses v0.1.0 (/opt/rustwide/workdir/valid_parentheses)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> word_search/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]  --> find_town_judge/src/main.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub fn find_judge(n: i32, trust: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]   |                       ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]  --> word_search/src/main.rs:6:18
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn exist(board: Vec<Vec<char>>, word: String) -> bool {
[INFO] [stdout]   |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]  --> word_search/src/main.rs:6:41
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn exist(board: Vec<Vec<char>>, word: String) -> bool {
[INFO] [stdout]   |                                         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trust`
[INFO] [stdout]  --> find_town_judge/src/main.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub fn find_judge(n: i32, trust: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]   |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_trust`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> find_town_judge/src/main.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `find_judge` is never used
[INFO] [stdout]  --> find_town_judge/src/main.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 5 |     pub fn find_judge(n: i32, trust: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]   --> island_perimeter/src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let test = vec![
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]   --> island_perimeter/src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let test = vec![
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling guessing_game_player v0.1.0 (/opt/rustwide/workdir/guessing_game_player)
[INFO] [stdout] warning: method `guessNumber` should have a snake case name
[INFO] [stdout]   --> guessing_game_player/src/main.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 |     unsafe fn guessNumber(mut right: i32) -> i32 {
[INFO] [stdout]    |               ^^^^^^^^^^^ help: convert the identifier to snake case: `guess_number`
[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 4.43s
[INFO] running `Command { std: "docker" "inspect" "0193be30d07c2db434d7393086877d112b12c80c2a2cee4610bf09a6403cd4a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0193be30d07c2db434d7393086877d112b12c80c2a2cee4610bf09a6403cd4a3", kill_on_drop: false }`
[INFO] [stdout] 0193be30d07c2db434d7393086877d112b12c80c2a2cee4610bf09a6403cd4a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e544c7b56460b91b7f2a2b7d713df0f4e7f3f7d63d9051f85959ad6a1aa23a1f
[INFO] running `Command { std: "docker" "start" "-a" "e544c7b56460b91b7f2a2b7d713df0f4e7f3f7d63d9051f85959ad6a1aa23a1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling find_town_judge v0.1.0 (/opt/rustwide/workdir/find_town_judge)
[INFO] [stderr]    Compiling island_perimeter v0.1.0 (/opt/rustwide/workdir/island_perimeter)
[INFO] [stderr]    Compiling valid_parentheses v0.1.0 (/opt/rustwide/workdir/valid_parentheses)
[INFO] [stderr]    Compiling word_search v0.1.0 (/opt/rustwide/workdir/word_search)
[INFO] [stderr]    Compiling find_star_graph_center v0.1.0 (/opt/rustwide/workdir/find_star_graph_center)
[INFO] [stderr]    Compiling perfect_squares v0.1.0 (/opt/rustwide/workdir/perfect_squares)
[INFO] [stderr]    Compiling best_time_but_sell v0.1.0 (/opt/rustwide/workdir/best_time_but_sell)
[INFO] [stderr]    Compiling longest_str_no_repeat v0.1.0 (/opt/rustwide/workdir/longest_str_no_repeat)
[INFO] [stderr]    Compiling biwise_and_range v0.1.0 (/opt/rustwide/workdir/biwise_and_range)
[INFO] [stderr]    Compiling guessing_game_player v0.1.0 (/opt/rustwide/workdir/guessing_game_player)
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> word_search/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]  --> find_town_judge/src/main.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub fn find_judge(n: i32, trust: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]   |                       ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `board`
[INFO] [stdout]  --> word_search/src/main.rs:6:18
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn exist(board: Vec<Vec<char>>, word: String) -> bool {
[INFO] [stdout]   |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_board`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]  --> word_search/src/main.rs:6:41
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn exist(board: Vec<Vec<char>>, word: String) -> bool {
[INFO] [stdout]   |                                         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trust`
[INFO] [stdout]  --> find_town_judge/src/main.rs:5:31
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub fn find_judge(n: i32, trust: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]   |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_trust`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> find_town_judge/src/main.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Solution {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `find_judge` is never used
[INFO] [stdout]  --> find_town_judge/src/main.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | impl Solution {
[INFO] [stdout]   | ------------- associated function in this implementation
[INFO] [stdout] 5 |     pub fn find_judge(n: i32, trust: Vec<Vec<i32>>) -> i32 {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `guessNumber` should have a snake case name
[INFO] [stdout]   --> guessing_game_player/src/main.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 12 |     unsafe fn guessNumber(mut right: i32) -> i32 {
[INFO] [stdout]    |               ^^^^^^^^^^^ help: convert the identifier to snake case: `guess_number`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]   --> island_perimeter/src/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let test = vec![
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `test`
[INFO] [stdout]   --> island_perimeter/src/main.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let test = vec![
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "e544c7b56460b91b7f2a2b7d713df0f4e7f3f7d63d9051f85959ad6a1aa23a1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e544c7b56460b91b7f2a2b7d713df0f4e7f3f7d63d9051f85959ad6a1aa23a1f", kill_on_drop: false }`
[INFO] [stdout] e544c7b56460b91b7f2a2b7d713df0f4e7f3f7d63d9051f85959ad6a1aa23a1f