[INFO] cloning repository https://github.com/ScathonLin/rust_datastructure
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ScathonLin/rust_datastructure" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FScathonLin%2Frust_datastructure", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FScathonLin%2Frust_datastructure'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f8df5f0d0e109f4d038b9f820e3deb5411d74df0
[INFO] testing ScathonLin/rust_datastructure 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%2FScathonLin%2Frust_datastructure" "/workspace/builds/worker-64/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-64/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ScathonLin/rust_datastructure 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/ScathonLin/rust_datastructure
[INFO] finished tweaking git repo https://github.com/ScathonLin/rust_datastructure
[INFO] tweaked toml for git repo https://github.com/ScathonLin/rust_datastructure written to /workspace/builds/worker-64/source/Cargo.toml
[INFO] crate git repo https://github.com/ScathonLin/rust_datastructure 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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] 6d526aa24a58448d2254c82a58efdf158b44f37374ebba0305f697ded20618d5
[INFO] running `Command { std: "docker" "start" "-a" "6d526aa24a58448d2254c82a58efdf158b44f37374ebba0305f697ded20618d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d526aa24a58448d2254c82a58efdf158b44f37374ebba0305f697ded20618d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d526aa24a58448d2254c82a58efdf158b44f37374ebba0305f697ded20618d5", kill_on_drop: false }`
[INFO] [stdout] 6d526aa24a58448d2254c82a58efdf158b44f37374ebba0305f697ded20618d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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] d696f52a64356ad9c15cc3c01574800d4549eb0794a9d73064988707768e1608
[INFO] running `Command { std: "docker" "start" "-a" "d696f52a64356ad9c15cc3c01574800d4549eb0794a9d73064988707768e1608", kill_on_drop: false }`
[INFO] [stderr]    Compiling stack_impl_by_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> src/queue/mod.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Queue`
[INFO] [stdout]  --> src/queue/mod.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Queue<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/queue/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new() -> Queue<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/queue/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn push(&mut self, elem: T) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/queue/mod.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]   --> src/queue/mod.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn peek(&self) -> Option<&T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.18s
[INFO] running `Command { std: "docker" "inspect" "d696f52a64356ad9c15cc3c01574800d4549eb0794a9d73064988707768e1608", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d696f52a64356ad9c15cc3c01574800d4549eb0794a9d73064988707768e1608", kill_on_drop: false }`
[INFO] [stdout] d696f52a64356ad9c15cc3c01574800d4549eb0794a9d73064988707768e1608
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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] 29bfd21e2f265c12f1f3d352273b3b374239a621073854dc5bbf214f6563af4b
[INFO] running `Command { std: "docker" "start" "-a" "29bfd21e2f265c12f1f3d352273b3b374239a621073854dc5bbf214f6563af4b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: struct is never constructed: `Node`
[INFO] [stdout]  --> src/queue/mod.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling stack_impl_by_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Queue`
[INFO] [stdout]  --> src/queue/mod.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct Queue<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/queue/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn new() -> Queue<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/queue/mod.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn push(&mut self, elem: T) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/queue/mod.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]   --> src/queue/mod.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn peek(&self) -> Option<&T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]    --> src/stack/mod.rs:180:3
[INFO] [stdout]     |
[INFO] [stdout] 180 |         age: i32,
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    --> src/stack/mod.rs:177:11
[INFO] [stdout]     |
[INFO] [stdout] 177 |     #[derive(Debug)]
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.59s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/stack_impl_by_rust-9d3217286a92e96e)
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/stack_impl_by_rust-b242fa9d5f39f618)
[INFO] running `Command { std: "docker" "inspect" "29bfd21e2f265c12f1f3d352273b3b374239a621073854dc5bbf214f6563af4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29bfd21e2f265c12f1f3d352273b3b374239a621073854dc5bbf214f6563af4b", kill_on_drop: false }`
[INFO] [stdout] 29bfd21e2f265c12f1f3d352273b3b374239a621073854dc5bbf214f6563af4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-64/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] 4e992e8ef7b67eed3c9b24c6cecce8625195bfa156a6a288a5de451d71f4828e
[INFO] running `Command { std: "docker" "start" "-a" "4e992e8ef7b67eed3c9b24c6cecce8625195bfa156a6a288a5de451d71f4828e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: struct is never constructed: `Node`
[INFO] [stderr]  --> src/queue/mod.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct Node<T> {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Queue`
[INFO] [stderr]  --> src/queue/mod.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct Queue<T> {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/queue/mod.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn new() -> Queue<T> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `push`
[INFO] [stderr]   --> src/queue/mod.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn push(&mut self, elem: T) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pop`
[INFO] [stderr]   --> src/queue/mod.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn pop(&mut self) -> Option<T> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `peek`
[INFO] [stderr]   --> src/queue/mod.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn peek(&self) -> Option<&T> {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `stack_impl_by_rust` (lib) generated 6 warnings
[INFO] [stderr] warning: field is never read: `age`
[INFO] [stderr]    --> src/stack/mod.rs:180:3
[INFO] [stderr]     |
[INFO] [stderr] 180 |         age: i32,
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    --> src/stack/mod.rs:177:11
[INFO] [stderr]     |
[INFO] [stderr] 177 |     #[derive(Debug)]
[INFO] [stderr]     |              ^^^^^
[INFO] [stderr]     = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `stack_impl_by_rust` (lib test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.31s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stack_impl_by_rust-9d3217286a92e96e)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/stack_impl_by_rust-b242fa9d5f39f618)
[INFO] [stdout] test queue::test::test_queue_opration ... ok
[INFO] [stdout] test stack::test::test_basic_operation ... ok
[INFO] [stdout] test stack::test::test_it_with_obj ... ok
[INFO] [stdout] test stack::test::test_iterator ... ok
[INFO] [stdout] test stack::test::test_mut_iterator ... ok
[INFO] [stdout] test stack::test::test_pop ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stack_impl_by_rust
[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" "4e992e8ef7b67eed3c9b24c6cecce8625195bfa156a6a288a5de451d71f4828e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e992e8ef7b67eed3c9b24c6cecce8625195bfa156a6a288a5de451d71f4828e", kill_on_drop: false }`
[INFO] [stdout] 4e992e8ef7b67eed3c9b24c6cecce8625195bfa156a6a288a5de451d71f4828e