[INFO] cloning repository https://github.com/MattCairns/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/MattCairns/leetcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMattCairns%2Fleetcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMattCairns%2Fleetcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 09653bc30f09a84f67f82daae0f5914ee822e234
[INFO] testing MattCairns/leetcode-rust against 1.94.0 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMattCairns%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] started tweaking git repo https://github.com/MattCairns/leetcode-rust
[INFO] finished tweaking git repo https://github.com/MattCairns/leetcode-rust
[INFO] tweaked toml for git repo https://github.com/MattCairns/leetcode-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MattCairns/leetcode-rust on toolchain 1.94.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.94.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MattCairns/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" "+1.94.0" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed964b55d3d5c93c885751c5fab594a603157f9547f442b357d0c90a6f1e4f92
[INFO] running `Command { std: "docker" "start" "-a" "ed964b55d3d5c93c885751c5fab594a603157f9547f442b357d0c90a6f1e4f92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed964b55d3d5c93c885751c5fab594a603157f9547f442b357d0c90a6f1e4f92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed964b55d3d5c93c885751c5fab594a603157f9547f442b357d0c90a6f1e4f92", kill_on_drop: false }`
[INFO] [stdout] ed964b55d3d5c93c885751c5fab594a603157f9547f442b357d0c90a6f1e4f92
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a7ac2fb9fe489c5cb9eb09feecd7f65a57826fdc43598a392ae7903990cc5fe
[INFO] running `Command { std: "docker" "start" "-a" "4a7ac2fb9fe489c5cb9eb09feecd7f65a57826fdc43598a392ae7903990cc5fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/medium/freqstack.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut max = 0;
[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: unused variable: `max`
[INFO] [stdout]   --> src/medium/freqstack.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut max = 0;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/medium/freqstack.rs:28:14
[INFO] [stdout]    |
[INFO] [stdout] 28 |         for (k, v) in self.freq_counter.iter().enumerate() {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/medium/freqstack.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |         for (k, v) in self.freq_counter.iter().enumerate() {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SubrectangleQueries` is never constructed
[INFO] [stdout]  --> src/medium/subrectangle_queries.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct SubrectangleQueries {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `update_subrectangle`, and `get_value` are never used
[INFO] [stdout]   --> src/medium/subrectangle_queries.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl SubrectangleQueries {
[INFO] [stdout]    | ------------------------ associated items in this implementation
[INFO] [stdout] 10 |     fn new(rectangle: Vec<Vec<i32>>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     fn update_subrectangle(&mut self, row1: i32, col1: i32, row2: i32, col2: i32, new_value: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn get_value(&self, row: i32, col: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FreqStack` is never constructed
[INFO] [stdout]  --> src/medium/freqstack.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct FreqStack {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, and `pop` are never used
[INFO] [stdout]   --> src/medium/freqstack.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl FreqStack {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 13 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     fn push(&mut self, val: i32) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     fn pop(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_common_prefix` is never used
[INFO] [stdout]  --> src/main.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remove_duplicates` is never used
[INFO] [stdout]   --> src/main.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "4a7ac2fb9fe489c5cb9eb09feecd7f65a57826fdc43598a392ae7903990cc5fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a7ac2fb9fe489c5cb9eb09feecd7f65a57826fdc43598a392ae7903990cc5fe", kill_on_drop: false }`
[INFO] [stdout] 4a7ac2fb9fe489c5cb9eb09feecd7f65a57826fdc43598a392ae7903990cc5fe
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3db7e8538ab054742110fbbb1e24c56e4f46216a433ed5394541682af65897fa
[INFO] running `Command { std: "docker" "start" "-a" "3db7e8538ab054742110fbbb1e24c56e4f46216a433ed5394541682af65897fa", kill_on_drop: false }`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/medium/freqstack.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut max = 0;
[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: unused variable: `max`
[INFO] [stdout]   --> src/medium/freqstack.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut max = 0;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/medium/freqstack.rs:28:14
[INFO] [stdout]    |
[INFO] [stdout] 28 |         for (k, v) in self.freq_counter.iter().enumerate() {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/medium/freqstack.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |         for (k, v) in self.freq_counter.iter().enumerate() {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SubrectangleQueries` is never constructed
[INFO] [stdout]  --> src/medium/subrectangle_queries.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct SubrectangleQueries {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `update_subrectangle`, and `get_value` are never used
[INFO] [stdout]   --> src/medium/subrectangle_queries.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl SubrectangleQueries {
[INFO] [stdout]    | ------------------------ associated items in this implementation
[INFO] [stdout] 10 |     fn new(rectangle: Vec<Vec<i32>>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 14 |     fn update_subrectangle(&mut self, row1: i32, col1: i32, row2: i32, col2: i32, new_value: i32) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     fn get_value(&self, row: i32, col: i32) -> i32 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FreqStack` is never constructed
[INFO] [stdout]  --> src/medium/freqstack.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct FreqStack {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, and `pop` are never used
[INFO] [stdout]   --> src/medium/freqstack.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl FreqStack {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 13 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     fn push(&mut self, val: i32) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     fn pop(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `longest_common_prefix` is never used
[INFO] [stdout]  --> src/main.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/medium/subrectangle_queries.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let mut rectangle = SubrectangleQueries::new(vec![vec![0, 0], vec![0, 0]]);
[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/medium/freqstack.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut max = 0;
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max`
[INFO] [stdout]   --> src/medium/freqstack.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let mut max = 0;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/medium/freqstack.rs:28:14
[INFO] [stdout]    |
[INFO] [stdout] 28 |         for (k, v) in self.freq_counter.iter().enumerate() {
[INFO] [stdout]    |              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/medium/freqstack.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |         for (k, v) in self.freq_counter.iter().enumerate() {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `pop` is never used
[INFO] [stdout]   --> src/medium/freqstack.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl FreqStack {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 26 |     fn pop(&self) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "3db7e8538ab054742110fbbb1e24c56e4f46216a433ed5394541682af65897fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3db7e8538ab054742110fbbb1e24c56e4f46216a433ed5394541682af65897fa", kill_on_drop: false }`
[INFO] [stdout] 3db7e8538ab054742110fbbb1e24c56e4f46216a433ed5394541682af65897fa
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0be814dd37ca59da97d92f0b9e2a5f43078ddb37885c58211ad0ae5be4774b65
[INFO] running `Command { std: "docker" "start" "-a" "0be814dd37ca59da97d92f0b9e2a5f43078ddb37885c58211ad0ae5be4774b65", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/medium/freqstack.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let mut max = 0;
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `max`
[INFO] [stderr]   --> src/medium/freqstack.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let mut max = 0;
[INFO] [stderr]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_max`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `k`
[INFO] [stderr]   --> src/medium/freqstack.rs:28:14
[INFO] [stderr]    |
[INFO] [stderr] 28 |         for (k, v) in self.freq_counter.iter().enumerate() {
[INFO] [stderr]    |              ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/medium/freqstack.rs:28:17
[INFO] [stderr]    |
[INFO] [stderr] 28 |         for (k, v) in self.freq_counter.iter().enumerate() {
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `SubrectangleQueries` is never constructed
[INFO] [stderr]  --> src/medium/subrectangle_queries.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | struct SubrectangleQueries {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `update_subrectangle`, and `get_value` are never used
[INFO] [stderr]   --> src/medium/subrectangle_queries.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr]  9 | impl SubrectangleQueries {
[INFO] [stderr]    | ------------------------ associated items in this implementation
[INFO] [stderr] 10 |     fn new(rectangle: Vec<Vec<i32>>) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 14 |     fn update_subrectangle(&mut self, row1: i32, col1: i32, row2: i32, col2: i32, new_value: i32) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 22 |     fn get_value(&self, row: i32, col: i32) -> i32 {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `FreqStack` is never constructed
[INFO] [stderr]  --> src/medium/freqstack.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct FreqStack {
[INFO] [stderr]   |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new`, `push`, and `pop` are never used
[INFO] [stderr]   --> src/medium/freqstack.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | impl FreqStack {
[INFO] [stderr]    | -------------- associated items in this implementation
[INFO] [stderr] 13 |     fn new() -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 20 |     fn push(&mut self, val: i32) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 26 |     fn pop(&self) -> i32 {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `leetcode` (lib) generated 8 warnings (run `cargo fix --lib -p leetcode` to apply 4 suggestions)
[INFO] [stderr] warning: function `longest_common_prefix` is never used
[INFO] [stderr]  --> src/main.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn longest_common_prefix(strs: Vec<String>) -> String {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `leetcode` (bin "leetcode" test) generated 1 warning
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/medium/subrectangle_queries.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |         let mut rectangle = SubrectangleQueries::new(vec![vec![0, 0], vec![0, 0]]);
[INFO] [stderr]    |             ----^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/medium/freqstack.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let mut max = 0;
[INFO] [stderr]    |             ----^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method `pop` is never used
[INFO] [stderr]   --> src/medium/freqstack.rs:26:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | impl FreqStack {
[INFO] [stderr]    | -------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 26 |     fn pop(&self) -> i32 {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `leetcode` (lib test) generated 6 warnings (3 duplicates) (run `cargo fix --lib -p leetcode --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/leetcode-f76fc4b437956505)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test easy::tests::test_pivot_index ... ok
[INFO] [stdout] test easy::tests::test_remove_element ... ok
[INFO] [stdout] test easy::tests::test_running_sum ... ok
[INFO] [stdout] test easy::tests::test_str_str ... ok
[INFO] [stdout] test medium::freqstack::tests::test_stack ... ok
[INFO] [stdout] test medium::max_increase_keeping_skyline::tests::test_max_increase_keeping_skyline ... ok
[INFO] [stdout] test medium::subrectangle_queries::tests::get_value ... ok
[INFO] [stdout] test medium::subrectangle_queries::tests::test_update_subrectangle ... ok
[INFO] [stdout] test easy::tests::test_is_subsequence ... ok
[INFO] [stdout] test easy::tests::test_is_isomorphic ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- easy::tests::test_is_isomorphic stdout ----
[INFO] [stdout] code == leet
[INFO] [stdout] add == egg
[INFO] [stdout] bar == foo
[INFO] [stdout] baba == badc
[INFO] [stdout] 
[INFO] [stdout] thread 'easy::tests::test_is_isomorphic' (17) panicked at src/easy.rs:58:34:
[INFO] [stdout] called `Option::unwrap()` on a `None` value
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5a05ce917932 - std::backtrace_rs::backtrace::libunwind::trace::hff358a60abf734fc
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x5a05ce917932 - std::backtrace_rs::backtrace::trace_unsynchronized::h3b121f916dd95ec6
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x5a05ce917932 - std::sys::backtrace::_print_fmt::hde0a62ded68798e9
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x5a05ce917932 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h93773fc827e3113d
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x5a05ce927b1a - core::fmt::rt::Argument::fmt::h01eff69902dad97f
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x5a05ce927b1a - core::fmt::write::hed7b5c73d82ecb7c
[INFO] [stdout]    6:     0x5a05ce8e6676 - std::io::default_write_fmt::h2f696ff5b8bbaa4b
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x5a05ce8e6676 - std::io::Write::write_fmt::h5e66814db8a9cfce
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x5a05ce8f6e19 - std::sys::backtrace::BacktraceLock::print::h8b1d6fcc5a56d1a3
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x5a05ce8f6e19 - std::panicking::default_hook::{{closure}}::h2be84df4f189ae36
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x5a05ce8f6cb1 - std::panicking::default_hook::hf0ea8939246f43a9
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x5a05ce8bb35e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h02d35e3888986252
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x5a05ce8bb35e - test::test_main_with_exit_callback::{{closure}}::h939640a27d647173
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x5a05ce8f7092 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hc9df09ff391af3e7
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x5a05ce8f7092 - std::panicking::panic_with_hook::hb4bd9ac1123582a0
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x5a05ce8f6f0a - std::panicking::panic_handler::{{closure}}::hde00dd15f5637fe2
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:691:13
[INFO] [stdout]   16:     0x5a05ce8f2469 - std::sys::backtrace::__rust_end_short_backtrace::hb72197fa777c1785
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x5a05ce8db4ad - __rustc[4425a7e20b4c8619]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x5a05ce92eeec - core::panicking::panic_fmt::ha59b517dd231f4da
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x5a05ce92eeb2 - core::panicking::panic::hbff2745fd4c5afec
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panicking.rs:150:5
[INFO] [stdout]   20:     0x5a05ce92e729 - core::option::unwrap_failed::h15daa19f2c0a511f
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/option.rs:2199:5
[INFO] [stdout]   21:     0x5a05ce8983ba - core::option::Option<T>::unwrap::h2cc02ae4c887b94a
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/option.rs:1016:21
[INFO] [stdout]   22:     0x5a05ce8983ba - leetcode::easy::is_isomorphic::h3b3950cc76290284
[INFO] [stdout]                                at /opt/rustwide/workdir/src/easy.rs:58:34
[INFO] [stdout]   23:     0x5a05ce89145a - leetcode::easy::tests::test_is_isomorphic::h47f4356bfb7055bf
[INFO] [stdout]                                at /opt/rustwide/workdir/src/easy.rs:146:20
[INFO] [stdout]   24:     0x5a05ce891877 - leetcode::easy::tests::test_is_isomorphic::{{closure}}::h322c23562dae289b
[INFO] [stdout]                                at /opt/rustwide/workdir/src/easy.rs:142:28
[INFO] [stdout]   25:     0x5a05ce895ef6 - core::ops::function::FnOnce::call_once::h24af50625fe00abd
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   26:     0x5a05ce8bb11b - core::ops::function::FnOnce::call_once::hddb3cd395c36bfbb
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   27:     0x5a05ce8bb11b - test::__rust_begin_short_backtrace::h0b6a7601d9750bfa
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:663:18
[INFO] [stdout]   28:     0x5a05ce8ceb2a - test::run_test_in_process::{{closure}}::h444209903f00b347
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:686:74
[INFO] [stdout]   29:     0x5a05ce8ceb2a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hfb3ba8f46e537649
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   30:     0x5a05ce8ceb2a - std::panicking::catch_unwind::do_call::h1672a45911fcf9dc
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:581:40
[INFO] [stdout]   31:     0x5a05ce8ceb2a - std::panicking::catch_unwind::h0fadaee22787a6dd
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:544:19
[INFO] [stdout]   32:     0x5a05ce8ceb2a - std::panic::catch_unwind::hc47ad190f2c8e188
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panic.rs:359:14
[INFO] [stdout]   33:     0x5a05ce8ceb2a - test::run_test_in_process::hcd7faaf934f29999
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:686:27
[INFO] [stdout]   34:     0x5a05ce8ceb2a - test::run_test::{{closure}}::hddc4550da4871867
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:607:43
[INFO] [stdout]   35:     0x5a05ce8a8f84 - test::run_test::{{closure}}::h98ae26689f13ed94
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/test/src/lib.rs:637:41
[INFO] [stdout]   36:     0x5a05ce8a8f84 - std::sys::backtrace::__rust_begin_short_backtrace::h3ec4d1f21ad44588
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   37:     0x5a05ce8ac922 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::hd8bf2c73d479939f
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   38:     0x5a05ce8ac922 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h3b4248f358af2491
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   39:     0x5a05ce8ac922 - std::panicking::catch_unwind::do_call::hda10a64f4b8daebe
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:581:40
[INFO] [stdout]   40:     0x5a05ce8ac922 - std::panicking::catch_unwind::h659e5ee8336ec8c7
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panicking.rs:544:19
[INFO] [stdout]   41:     0x5a05ce8ac922 - std::panic::catch_unwind::h9d4d66a538912c18
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/panic.rs:359:14
[INFO] [stdout]   42:     0x5a05ce8ac922 - std::thread::lifecycle::spawn_unchecked::{{closure}}::h7557906bb51d79f1
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   43:     0x5a05ce8ac922 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h9e460d1d7fc83d35
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   44:     0x5a05ce8ed6ff - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h61282da819d64ea9
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   45:     0x5a05ce8ed6ff - std::sys::thread::unix::Thread::new::thread_start::h982f9ea829d1b5fb
[INFO] [stdout]                                at /rustc/4a4ef493e3a1488c6e321570238084b38948f6db/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stdout]   46:     0x76491fd86aa4 - <unknown>
[INFO] [stdout]   47:     0x76491fe13a64 - clone
[INFO] [stdout]   48:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     easy::tests::test_is_isomorphic
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 9 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.15s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "0be814dd37ca59da97d92f0b9e2a5f43078ddb37885c58211ad0ae5be4774b65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0be814dd37ca59da97d92f0b9e2a5f43078ddb37885c58211ad0ae5be4774b65", kill_on_drop: false }`
[INFO] [stdout] 0be814dd37ca59da97d92f0b9e2a5f43078ddb37885c58211ad0ae5be4774b65
