[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] testing MurphyWZhu/mu_leet_code against beta-2022-04-10 for beta-1.61-1
[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 beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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" "+beta-2022-04-10" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 68cb61a92dc5a521828244abcf91f16dbed4a0588120a525750a2f132bb8f357
[INFO] running `Command { std: "docker" "start" "-a" "68cb61a92dc5a521828244abcf91f16dbed4a0588120a525750a2f132bb8f357", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68cb61a92dc5a521828244abcf91f16dbed4a0588120a525750a2f132bb8f357", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68cb61a92dc5a521828244abcf91f16dbed4a0588120a525750a2f132bb8f357", kill_on_drop: false }`
[INFO] [stdout] 68cb61a92dc5a521828244abcf91f16dbed4a0588120a525750a2f132bb8f357
[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=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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33fd0d7493a4c4a64ce386e6f93db28a6aa12f2cdb3bd2fce5bc18087e7f9905
[INFO] running `Command { std: "docker" "start" "-a" "33fd0d7493a4c4a64ce386e6f93db28a6aa12f2cdb3bd2fce5bc18087e7f9905", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling 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: 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: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "33fd0d7493a4c4a64ce386e6f93db28a6aa12f2cdb3bd2fce5bc18087e7f9905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33fd0d7493a4c4a64ce386e6f93db28a6aa12f2cdb3bd2fce5bc18087e7f9905", kill_on_drop: false }`
[INFO] [stdout] 33fd0d7493a4c4a64ce386e6f93db28a6aa12f2cdb3bd2fce5bc18087e7f9905
[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=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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43767d6ba87a0c21856091162a85bf0aa3a8897ab0b7006d7429687b105ece80
[INFO] running `Command { std: "docker" "start" "-a" "43767d6ba87a0c21856091162a85bf0aa3a8897ab0b7006d7429687b105ece80", kill_on_drop: false }`
[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] [stderr]    Compiling mu_leet_code v0.1.0 (/opt/rustwide/workdir)
[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: 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.30s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/mu_leet_code-40f93370e63282f3)
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/mu_leet_code-faeb80b9ad6a119c)
[INFO] running `Command { std: "docker" "inspect" "43767d6ba87a0c21856091162a85bf0aa3a8897ab0b7006d7429687b105ece80", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43767d6ba87a0c21856091162a85bf0aa3a8897ab0b7006d7429687b105ece80", kill_on_drop: false }`
[INFO] [stdout] 43767d6ba87a0c21856091162a85bf0aa3a8897ab0b7006d7429687b105ece80
[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=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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4423755faa99573bbabf62e65aacf1d2c233bdb68048f9da62611f7237ebdd29
[INFO] running `Command { std: "docker" "start" "-a" "4423755faa99573bbabf62e65aacf1d2c233bdb68048f9da62611f7237ebdd29", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/lib.rs:79:21
[INFO] [stderr]    |
[INFO] [stderr] 79 |                 for i in 0..median + 1 {
[INFO] [stderr]    |                     ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `mu_leet_code` (lib) generated 1 warning
[INFO] [stderr] warning: `mu_leet_code` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]  --> src/lib.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |         pub struct Solution {}
[INFO] [stderr]   |                    ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `two_sum`
[INFO] [stderr]   --> src/lib.rs:10:20
[INFO] [stderr]    |
[INFO] [stderr] 10 |             pub fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stderr]    |                    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `two_sum_test`
[INFO] [stderr]   --> src/lib.rs:23:20
[INFO] [stderr]    |
[INFO] [stderr] 23 |             pub fn two_sum_test() {
[INFO] [stderr]    |                    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> src/lib.rs:34:20
[INFO] [stderr]    |
[INFO] [stderr] 34 |         pub struct Solution {}
[INFO] [stderr]    |                    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `length_of_longest_substring`
[INFO] [stderr]   --> src/lib.rs:37:20
[INFO] [stderr]    |
[INFO] [stderr] 37 |             pub fn length_of_longest_substring(s: String) -> i32 {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `length_of_longest_substring_test`
[INFO] [stderr]   --> src/lib.rs:62:20
[INFO] [stderr]    |
[INFO] [stderr] 62 |             pub fn length_of_longest_substring_test() {
[INFO] [stderr]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `mu_leet_code` (bin "mu_leet_code" test) generated 7 warnings (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mu_leet_code-40f93370e63282f3)
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/mu_leet_code-faeb80b9ad6a119c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mu_leet_code
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4423755faa99573bbabf62e65aacf1d2c233bdb68048f9da62611f7237ebdd29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4423755faa99573bbabf62e65aacf1d2c233bdb68048f9da62611f7237ebdd29", kill_on_drop: false }`
[INFO] [stdout] 4423755faa99573bbabf62e65aacf1d2c233bdb68048f9da62611f7237ebdd29