[INFO] cloning repository https://github.com/Dhole/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Dhole/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDhole%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDhole%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d05e463827e5ebb860a379c3714631acf7e3d728
[INFO] testing Dhole/rust_learning against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDhole%2Frust_learning" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Dhole/rust_learning on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Dhole/rust_learning
[INFO] finished tweaking git repo https://github.com/Dhole/rust_learning
[INFO] tweaked toml for git repo https://github.com/Dhole/rust_learning written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Dhole/rust_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90bcaf1786c558ef30e41818418221389383dc94cfc6f04bb2eaac3426ab39e0
[INFO] running `Command { std: "docker" "start" "-a" "90bcaf1786c558ef30e41818418221389383dc94cfc6f04bb2eaac3426ab39e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90bcaf1786c558ef30e41818418221389383dc94cfc6f04bb2eaac3426ab39e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90bcaf1786c558ef30e41818418221389383dc94cfc6f04bb2eaac3426ab39e0", kill_on_drop: false }`
[INFO] [stdout] 90bcaf1786c558ef30e41818418221389383dc94cfc6f04bb2eaac3426ab39e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f47f58827a32424d09489f71fa687cd3d806bcb52d56cc61f896313b5ea83cea
[INFO] running `Command { std: "docker" "start" "-a" "f47f58827a32424d09489f71fa687cd3d806bcb52d56cc61f896313b5ea83cea", kill_on_drop: false }`
[INFO] [stderr]    Compiling learn v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::rand`
[INFO] [stdout]   --> src/main.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | use std::rand;
[INFO] [stdout]    |     ^^^^^^^^^ no `rand` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::rand`
[INFO] [stdout]   --> src/main.rs:54:10
[INFO] [stdout]    |
[INFO] [stdout] 54 | use std::rand::Rng;
[INFO] [stdout]    |          ^^^^ could not find `rand` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "f47f58827a32424d09489f71fa687cd3d806bcb52d56cc61f896313b5ea83cea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f47f58827a32424d09489f71fa687cd3d806bcb52d56cc61f896313b5ea83cea", kill_on_drop: false }`
[INFO] [stdout] f47f58827a32424d09489f71fa687cd3d806bcb52d56cc61f896313b5ea83cea