[INFO] cloning repository https://github.com/MurphyWZhu/mu_leet_code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MurphyWZhu/mu_leet_code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMurphyWZhu%2Fmu_leet_code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMurphyWZhu%2Fmu_leet_code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 53317d4890e49997d2edeed4b7d076f6bcce86c1
[INFO] checking MurphyWZhu/mu_leet_code against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMurphyWZhu%2Fmu_leet_code" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MurphyWZhu/mu_leet_code on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MurphyWZhu/mu_leet_code
[INFO] finished tweaking git repo https://github.com/MurphyWZhu/mu_leet_code
[INFO] tweaked toml for git repo https://github.com/MurphyWZhu/mu_leet_code written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/MurphyWZhu/mu_leet_code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17dfdbcc320cb71bb455919b4f39f817a711cfaf4c0798a4affceb37145a2610
[INFO] running `Command { std: "docker" "start" "-a" "17dfdbcc320cb71bb455919b4f39f817a711cfaf4c0798a4affceb37145a2610", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17dfdbcc320cb71bb455919b4f39f817a711cfaf4c0798a4affceb37145a2610", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17dfdbcc320cb71bb455919b4f39f817a711cfaf4c0798a4affceb37145a2610", kill_on_drop: false }`
[INFO] [stdout] 17dfdbcc320cb71bb455919b4f39f817a711cfaf4c0798a4affceb37145a2610
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aae543096fe9626b46885df046cc88f294deccdb61526162561c014e588fcdce
[INFO] running `Command { std: "docker" "start" "-a" "aae543096fe9626b46885df046cc88f294deccdb61526162561c014e588fcdce", kill_on_drop: false }`
[INFO] [stderr]     Checking mu_leet_code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:79:21
[INFO] [stdout]    |
[INFO] [stdout] 79 |                 for i in 0..median + 1 {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:79:21
[INFO] [stdout]    |
[INFO] [stdout] 79 |                 for i in 0..median + 1 {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:79:21
[INFO] [stdout]    |
[INFO] [stdout] 79 |                 for i in 0..median + 1 {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/lib.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |         pub struct Solution {}
[INFO] [stdout]   |                    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two_sum`
[INFO] [stdout]   --> src/lib.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 |             pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two_sum_test`
[INFO] [stdout]   --> src/lib.rs:23:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |             pub fn two_sum_test() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/lib.rs:34:20
[INFO] [stdout]    |
[INFO] [stdout] 34 |         pub struct Solution {}
[INFO] [stdout]    |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length_of_longest_substring`
[INFO] [stdout]   --> src/lib.rs:37:20
[INFO] [stdout]    |
[INFO] [stdout] 37 |             pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length_of_longest_substring_test`
[INFO] [stdout]   --> src/lib.rs:62:20
[INFO] [stdout]    |
[INFO] [stdout] 62 |             pub fn length_of_longest_substring_test() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:79:21
[INFO] [stdout]    |
[INFO] [stdout] 79 |                 for i in 0..median + 1 {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> src/lib.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |         pub struct Solution {}
[INFO] [stdout]   |                    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two_sum`
[INFO] [stdout]   --> src/lib.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 |             pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]    |                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `two_sum_test`
[INFO] [stdout]   --> src/lib.rs:23:20
[INFO] [stdout]    |
[INFO] [stdout] 23 |             pub fn two_sum_test() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]   --> src/lib.rs:34:20
[INFO] [stdout]    |
[INFO] [stdout] 34 |         pub struct Solution {}
[INFO] [stdout]    |                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length_of_longest_substring`
[INFO] [stdout]   --> src/lib.rs:37:20
[INFO] [stdout]    |
[INFO] [stdout] 37 |             pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length_of_longest_substring_test`
[INFO] [stdout]   --> src/lib.rs:62:20
[INFO] [stdout]    |
[INFO] [stdout] 62 |             pub fn length_of_longest_substring_test() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "aae543096fe9626b46885df046cc88f294deccdb61526162561c014e588fcdce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aae543096fe9626b46885df046cc88f294deccdb61526162561c014e588fcdce", kill_on_drop: false }`
[INFO] [stdout] aae543096fe9626b46885df046cc88f294deccdb61526162561c014e588fcdce