[INFO] updating cached repository https://github.com/b4284/guessing_game
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c1780cdf1b0740d0297c46b50d131e91c6ae2bd8
[INFO] testing b4284/guessing_game against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fb4284%2Fguessing_game" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/b4284/guessing_game on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/b4284/guessing_game
[INFO] finished tweaking git repo https://github.com/b4284/guessing_game
[INFO] tweaked toml for git repo https://github.com/b4284/guessing_game written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/b4284/guessing_game already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 96c1a26726ee2701e39589a94aa3cb2130db3ea66bd3293ad07123bd6a6f1334
[INFO] running `"docker" "start" "-a" "96c1a26726ee2701e39589a94aa3cb2130db3ea66bd3293ad07123bd6a6f1334"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling guessing_game v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: could not find `rand` in `std`
[INFO] [stderr]  --> src/main.rs:4:23
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let secret = std::rand::random::<u8>() % 100 + 1;
[INFO] [stderr]   |                       ^^^^ could not find `rand` in `std`
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 1 argument but 0 arguments were supplied
[INFO] [stderr]   --> src/main.rs:31:38
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let input = std::io::stdin().read_line().ok().expect("shouldn't fail");
[INFO] [stderr]    |                                      ^^^^^^^^^- supplied 0 arguments
[INFO] [stderr]    |                                      |
[INFO] [stderr]    |                                      expected 1 argument
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `trim` found for type `usize` in the current scope
[INFO] [stderr]   --> src/main.rs:32:21
[INFO] [stderr]    |
[INFO] [stderr] 32 |         match input.trim().parse::<u8>() {
[INFO] [stderr]    |                     ^^^^ method not found in `usize`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0061, E0433, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0061`.
[INFO] [stderr] error: could not compile `guessing_game`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "96c1a26726ee2701e39589a94aa3cb2130db3ea66bd3293ad07123bd6a6f1334"`
[INFO] running `"docker" "rm" "-f" "96c1a26726ee2701e39589a94aa3cb2130db3ea66bd3293ad07123bd6a6f1334"`
[INFO] [stdout] 96c1a26726ee2701e39589a94aa3cb2130db3ea66bd3293ad07123bd6a6f1334