[INFO] cloning repository https://github.com/jackie-png/Boggle-on-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jackie-png/Boggle-on-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjackie-png%2FBoggle-on-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjackie-png%2FBoggle-on-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 00b17929c147fad02e5fbd6c14b93aabeb08cbf0
[INFO] testing jackie-png/Boggle-on-Rust against 1.95.0 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjackie-png%2FBoggle-on-Rust" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jackie-png/Boggle-on-Rust
[INFO] finished tweaking git repo https://github.com/jackie-png/Boggle-on-Rust
[INFO] tweaked toml for git repo https://github.com/jackie-png/Boggle-on-Rust written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jackie-png/Boggle-on-Rust on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jackie-png/Boggle-on-Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.153
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e0fd39fe41d92f23cf8ad2fa2bbbb59ab1cb3579eb5fdf141c2c131fb701a8cf
[INFO] running `Command { std: "docker" "start" "-a" "e0fd39fe41d92f23cf8ad2fa2bbbb59ab1cb3579eb5fdf141c2c131fb701a8cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0fd39fe41d92f23cf8ad2fa2bbbb59ab1cb3579eb5fdf141c2c131fb701a8cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0fd39fe41d92f23cf8ad2fa2bbbb59ab1cb3579eb5fdf141c2c131fb701a8cf", kill_on_drop: false }`
[INFO] [stdout] e0fd39fe41d92f23cf8ad2fa2bbbb59ab1cb3579eb5fdf141c2c131fb701a8cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 584788e889c573a8ade8493f636799472d7a0ea94ad51b721efd361851c3a07e
[INFO] running `Command { std: "docker" "start" "-a" "584788e889c573a8ade8493f636799472d7a0ea94ad51b721efd361851c3a07e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling boggle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `env`
[INFO] [stdout]  --> src/main.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{collections::HashMap, env};
[INFO] [stdout]   |                                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `boggle`
[INFO] [stdout]    --> src/main.rs:216:11
[INFO] [stdout]     |
[INFO] [stdout] 216 | mod tests;
[INFO] [stdout]     |           ^ consider adding a `main` function to `src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `letter`
[INFO] [stdout]    --> src/main.rs:101:19
[INFO] [stdout]     |
[INFO] [stdout] 101 |         for (col, letter) in row_str.chars().enumerate() {
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_letter`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `boggle` (bin "boggle") due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "584788e889c573a8ade8493f636799472d7a0ea94ad51b721efd361851c3a07e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "584788e889c573a8ade8493f636799472d7a0ea94ad51b721efd361851c3a07e", kill_on_drop: false }`
[INFO] [stdout] 584788e889c573a8ade8493f636799472d7a0ea94ad51b721efd361851c3a07e
