[INFO] cloning repository https://github.com/rafaelzimmermann/algo-classics
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rafaelzimmermann/algo-classics" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frafaelzimmermann%2Falgo-classics", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frafaelzimmermann%2Falgo-classics'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4eff328a1fcc2f4d078a5c5ce072e1f70aeb07fb
[INFO] checking rafaelzimmermann/algo-classics against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frafaelzimmermann%2Falgo-classics" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rafaelzimmermann/algo-classics
[INFO] finished tweaking git repo https://github.com/rafaelzimmermann/algo-classics
[INFO] tweaked toml for git repo https://github.com/rafaelzimmermann/algo-classics written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rafaelzimmermann/algo-classics on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rafaelzimmermann/algo-classics 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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-2-tc2/source/Cargo.toml: unused manifest key: package.author
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] faa07fc63cc4b0cb1e7082a9ea8913dda7516b3be4134b37b71f375e14508515
[INFO] running `Command { std: "docker" "start" "-a" "faa07fc63cc4b0cb1e7082a9ea8913dda7516b3be4134b37b71f375e14508515", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "faa07fc63cc4b0cb1e7082a9ea8913dda7516b3be4134b37b71f375e14508515", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faa07fc63cc4b0cb1e7082a9ea8913dda7516b3be4134b37b71f375e14508515", kill_on_drop: false }`
[INFO] [stdout] faa07fc63cc4b0cb1e7082a9ea8913dda7516b3be4134b37b71f375e14508515
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a54afe3c1cbe57984ff67c7c40455215534a5c0a6e86922b6535769cdd63644
[INFO] running `Command { std: "docker" "start" "-a" "3a54afe3c1cbe57984ff67c7c40455215534a5c0a6e86922b6535769cdd63644", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/Cargo.toml: unused manifest key: package.author
[INFO] [stderr]     Checking algo_classics v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Sorter` is never used
[INFO] [stdout]  --> src/sort.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | trait Sorter {
[INFO] [stdout]   |       ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BubbleSort` is never constructed
[INFO] [stdout]  --> src/sort/bubble_sort.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) struct BubbleSort;
[INFO] [stdout]   |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `swap` is never used
[INFO] [stdout]  --> src/sort/bubble_sort.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl BubbleSort {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 6 |     fn swap(slice: &mut [i32], i: usize, j:usize) {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MergeSort` is never constructed
[INFO] [stdout]  --> src/sort/merge_sort.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) struct MergeSort;
[INFO] [stdout]   |                   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `mergesort`, `merge`, and `init_sort` are never used
[INFO] [stdout]   --> src/sort/merge_sort.rs:6:8
[INFO] [stdout]    |
[INFO] [stdout]  5 | impl MergeSort {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout]  6 |     fn mergesort(&self, slice: &mut [i32], helper: &mut[i32], low: &usize, high: &usize) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     fn merge(&self, slice: &mut [i32], helper: &mut [i32], low: &usize, middle: &usize, high: &usize) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn init_sort(self, slice: &mut [i32]) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `algo_classics`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider adding a `main` function to `src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `algo_classics` (bin "algo_classics") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3a54afe3c1cbe57984ff67c7c40455215534a5c0a6e86922b6535769cdd63644", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a54afe3c1cbe57984ff67c7c40455215534a5c0a6e86922b6535769cdd63644", kill_on_drop: false }`
[INFO] [stdout] 3a54afe3c1cbe57984ff67c7c40455215534a5c0a6e86922b6535769cdd63644