[INFO] cloning repository https://github.com/JamesZFS/LeetCode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JamesZFS/LeetCode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJamesZFS%2FLeetCode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJamesZFS%2FLeetCode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 34283e6a7ea27b8a806d8726241288117896aca5
[INFO] testing JamesZFS/LeetCode against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJamesZFS%2FLeetCode" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JamesZFS/LeetCode on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JamesZFS/LeetCode
[INFO] finished tweaking git repo https://github.com/JamesZFS/LeetCode
[INFO] tweaked toml for git repo https://github.com/JamesZFS/LeetCode written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/JamesZFS/LeetCode already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80a89cd833a6c80a6a3a44dddf1f04d9c6cab673a1dcc071ffe4731ed10848ed
[INFO] running `Command { std: "docker" "start" "-a" "80a89cd833a6c80a6a3a44dddf1f04d9c6cab673a1dcc071ffe4731ed10848ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80a89cd833a6c80a6a3a44dddf1f04d9c6cab673a1dcc071ffe4731ed10848ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80a89cd833a6c80a6a3a44dddf1f04d9c6cab673a1dcc071ffe4731ed10848ed", kill_on_drop: false }`
[INFO] [stdout] 80a89cd833a6c80a6a3a44dddf1f04d9c6cab673a1dcc071ffe4731ed10848ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a3589f738705755e7b1d83c722ea8ab2430f309c9337cb4df3f2403e8d59bb2
[INFO] running `Command { std: "docker" "start" "-a" "9a3589f738705755e7b1d83c722ea8ab2430f309c9337cb4df3f2403e8d59bb2", kill_on_drop: false }`
[INFO] [stderr]    Compiling leet_code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `tail`
[INFO] [stdout]   --> src/practice/list.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn tail(&self) -> &Link<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "9a3589f738705755e7b1d83c722ea8ab2430f309c9337cb4df3f2403e8d59bb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a3589f738705755e7b1d83c722ea8ab2430f309c9337cb4df3f2403e8d59bb2", kill_on_drop: false }`
[INFO] [stdout] 9a3589f738705755e7b1d83c722ea8ab2430f309c9337cb4df3f2403e8d59bb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c42999593cce9caef8152be5ed6b1d866aac074c66c200bbdc87beaf07a9b63
[INFO] running `Command { std: "docker" "start" "-a" "3c42999593cce9caef8152be5ed6b1d866aac074c66c200bbdc87beaf07a9b63", kill_on_drop: false }`
[INFO] [stderr]    Compiling leet_code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `tail`
[INFO] [stdout]   --> src/practice/list.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn tail(&self) -> &Link<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `tail`
[INFO] [stdout]   --> src/practice/list.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn tail(&self) -> &Link<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `Command { std: "docker" "inspect" "3c42999593cce9caef8152be5ed6b1d866aac074c66c200bbdc87beaf07a9b63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c42999593cce9caef8152be5ed6b1d866aac074c66c200bbdc87beaf07a9b63", kill_on_drop: false }`
[INFO] [stdout] 3c42999593cce9caef8152be5ed6b1d866aac074c66c200bbdc87beaf07a9b63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2f2737d9418e3257f54970d3e91a0a618fdf217478ea6016fc616280116a24ef
[INFO] running `Command { std: "docker" "start" "-a" "2f2737d9418e3257f54970d3e91a0a618fdf217478ea6016fc616280116a24ef", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `tail`
[INFO] [stderr]   --> src/practice/list.rs:94:8
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn tail(&self) -> &Link<T> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `leet_code` (lib) generated 1 warning
[INFO] [stderr] warning: `leet_code` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/leet_code-bf90df072ab726d6)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test array::p1::tests::test ... ok
[INFO] [stdout] test array::p2::tests::test ... ok
[INFO] [stdout] test array::p3::tests::test ... ok
[INFO] [stdout] test practice::heap::tests::basic ... ok
[INFO] [stdout] test practice::heap::tests::sort ... ok
[INFO] [stdout] test practice::list::test::insert_remove ... ok
[INFO] [stdout] test practice::list::test::basics ... ok
[INFO] [stdout] test practice::list::test::iterator ... ok
[INFO] [stdout] test string::p1::tests::test ... ok
[INFO] [stdout] test practice::sort::tests::test ... ok
[INFO] [stdout] test string::p2::test::test ... ok
[INFO] [stdout] test string::p3::tests::test ... ok
[INFO] [stdout] test string::p5::tests::test ... ok
[INFO] [stdout] test string::p6::tests::test ... ok
[INFO] [stdout] test string::p7::tests::test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests leet_code
[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" "2f2737d9418e3257f54970d3e91a0a618fdf217478ea6016fc616280116a24ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f2737d9418e3257f54970d3e91a0a618fdf217478ea6016fc616280116a24ef", kill_on_drop: false }`
[INFO] [stdout] 2f2737d9418e3257f54970d3e91a0a618fdf217478ea6016fc616280116a24ef