[INFO] cloning repository https://github.com/nlflint/BubbleSort
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nlflint/BubbleSort" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnlflint%2FBubbleSort"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnlflint%2FBubbleSort'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ce08fb5b86f01910ee0f2cab2450dcbe89ecfc7b
[INFO] checking nlflint/BubbleSort against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnlflint%2FBubbleSort" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nlflint/BubbleSort on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nlflint/BubbleSort
[INFO] finished tweaking git repo https://github.com/nlflint/BubbleSort
[INFO] tweaked toml for git repo https://github.com/nlflint/BubbleSort written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/nlflint/BubbleSort already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] bb4cde2ce39a709e197ad6db9eec9affaede50dc16cdfadab576ea3b8db6a912
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "bb4cde2ce39a709e197ad6db9eec9affaede50dc16cdfadab576ea3b8db6a912"`
[INFO] [stderr]     Checking BubbleSort v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `BubbleSort`
[INFO] [stderr]   --> src/main.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr] 1  | / use std::cmp::Ordering;
[INFO] [stderr] 2  | |
[INFO] [stderr] 3  | | fn bubble_sort<T: PartialOrd>(mut collection :Vec<T>) -> Vec<T> {
[INFO] [stderr] 4  | |     let mut swap_happened = false;
[INFO] [stderr] ...  |
[INFO] [stderr] 79 | |         "pineapple".to_string()]);
[INFO] [stderr] 80 | | }
[INFO] [stderr]    | |_^ consider adding a `main` function to `src/main.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] warning: crate `BubbleSort` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `bubble_sort`
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `BubbleSort`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "bb4cde2ce39a709e197ad6db9eec9affaede50dc16cdfadab576ea3b8db6a912"`
[INFO] running `"docker" "rm" "-f" "bb4cde2ce39a709e197ad6db9eec9affaede50dc16cdfadab576ea3b8db6a912"`
[INFO] [stdout] bb4cde2ce39a709e197ad6db9eec9affaede50dc16cdfadab576ea3b8db6a912