[INFO] cloning repository https://github.com/zwhitchcox/rust-lc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zwhitchcox/rust-lc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzwhitchcox%2Frust-lc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzwhitchcox%2Frust-lc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b23b288f79bbe44744785780b39d696b4506022c
[INFO] testing zwhitchcox/rust-lc against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzwhitchcox%2Frust-lc" "/workspace/builds/worker-38/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-38/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zwhitchcox/rust-lc on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zwhitchcox/rust-lc
[INFO] finished tweaking git repo https://github.com/zwhitchcox/rust-lc
[INFO] tweaked toml for git repo https://github.com/zwhitchcox/rust-lc written to /workspace/builds/worker-38/source/Cargo.toml
[INFO] crate git repo https://github.com/zwhitchcox/rust-lc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 13d57a377098300bc3cd084f0530f76c887b37949f80b922afe1cfe21e9910af
[INFO] running `Command { std: "docker" "start" "-a" "13d57a377098300bc3cd084f0530f76c887b37949f80b922afe1cfe21e9910af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13d57a377098300bc3cd084f0530f76c887b37949f80b922afe1cfe21e9910af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13d57a377098300bc3cd084f0530f76c887b37949f80b922afe1cfe21e9910af", kill_on_drop: false }`
[INFO] [stdout] 13d57a377098300bc3cd084f0530f76c887b37949f80b922afe1cfe21e9910af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 46a0db2f0de1dfe8a663f3321fa9a327900b94fa5ec586b4c111145be05f309d
[INFO] running `Command { std: "docker" "start" "-a" "46a0db2f0de1dfe8a663f3321fa9a327900b94fa5ec586b4c111145be05f309d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_lc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0601]: `main` function not found in crate `rust_lc`
[INFO] [stdout]   --> src/main.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / struct Solution;
[INFO] [stdout] 2  | |
[INFO] [stdout] 3  | | impl Solution {
[INFO] [stdout] 4  | |     fn is_pair_of_ordered_brackets(bracket1: char, bracket2: char) -> bool {
[INFO] [stdout] ...  |
[INFO] [stdout] 42 | |     assert_eq!(Solution::is_valid(String::from("{[]}")), true);
[INFO] [stdout] 43 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_lc` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "46a0db2f0de1dfe8a663f3321fa9a327900b94fa5ec586b4c111145be05f309d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46a0db2f0de1dfe8a663f3321fa9a327900b94fa5ec586b4c111145be05f309d", kill_on_drop: false }`
[INFO] [stdout] 46a0db2f0de1dfe8a663f3321fa9a327900b94fa5ec586b4c111145be05f309d
