[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] checking zwhitchcox/rust-lc against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzwhitchcox%2Frust-lc" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zwhitchcox/rust-lc on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", 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-9/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" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc2f9fb5e10e1a8e79081c5c95a810fdadd7cbb664b50bf30fd395ef860dd514
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cc2f9fb5e10e1a8e79081c5c95a810fdadd7cbb664b50bf30fd395ef860dd514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc2f9fb5e10e1a8e79081c5c95a810fdadd7cbb664b50bf30fd395ef860dd514", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc2f9fb5e10e1a8e79081c5c95a810fdadd7cbb664b50bf30fd395ef860dd514", kill_on_drop: false }`
[INFO] [stdout] cc2f9fb5e10e1a8e79081c5c95a810fdadd7cbb664b50bf30fd395ef860dd514
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b719a6202a1c49f0953484595a92120fe82bad4b252454b843c2076c54c572af
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b719a6202a1c49f0953484595a92120fe82bad4b252454b843c2076c54c572af", kill_on_drop: false }`
[INFO] [stderr]     Checking 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`
[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] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b719a6202a1c49f0953484595a92120fe82bad4b252454b843c2076c54c572af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b719a6202a1c49f0953484595a92120fe82bad4b252454b843c2076c54c572af", kill_on_drop: false }`
[INFO] [stdout] b719a6202a1c49f0953484595a92120fe82bad4b252454b843c2076c54c572af