[INFO] cloning repository https://github.com/piedshag/maze
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/piedshag/maze" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpiedshag%2Fmaze", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpiedshag%2Fmaze'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cf25792efa7ca8a9aea021c1897ba9a177364d13
[INFO] testing piedshag/maze against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpiedshag%2Fmaze" "/workspace/builds/worker-27/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-27/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/piedshag/maze on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/piedshag/maze
[INFO] finished tweaking git repo https://github.com/piedshag/maze
[INFO] tweaked toml for git repo https://github.com/piedshag/maze written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] crate git repo https://github.com/piedshag/maze already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1dd2f3a81a906d726115d1f5898ef497e8e5ee8f4a017896808554eb5960d75
[INFO] running `Command { std: "docker" "start" "-a" "a1dd2f3a81a906d726115d1f5898ef497e8e5ee8f4a017896808554eb5960d75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1dd2f3a81a906d726115d1f5898ef497e8e5ee8f4a017896808554eb5960d75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1dd2f3a81a906d726115d1f5898ef497e8e5ee8f4a017896808554eb5960d75", kill_on_drop: false }`
[INFO] [stdout] a1dd2f3a81a906d726115d1f5898ef497e8e5ee8f4a017896808554eb5960d75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d7a1542afb542dfb2b89a03268a8d1d4e35e54635252b4ab0cdb28b212d11fbe
[INFO] running `Command { std: "docker" "start" "-a" "d7a1542afb542dfb2b89a03268a8d1d4e35e54635252b4ab0cdb28b212d11fbe", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling getrandom v0.2.5
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling maze v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected `;`, found `println`
[INFO] [stdout]    --> src/main.rs:167:15
[INFO] [stdout]     |
[INFO] [stdout] 167 |     maze.run()
[INFO] [stdout]     |               ^ help: add `;` here
[INFO] [stdout] 168 |     println!("{}", maze)
[INFO] [stdout]     |     ------- unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/main.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/main.rs:167:5
[INFO] [stdout]     |
[INFO] [stdout] 167 |     maze.run()
[INFO] [stdout]     |     ^^^^^^^^^^- help: consider using a semicolon here
[INFO] [stdout]     |     |
[INFO] [stdout]     |     expected `()`, found `usize`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> src/main.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{self, Write};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `maze` due to 3 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d7a1542afb542dfb2b89a03268a8d1d4e35e54635252b4ab0cdb28b212d11fbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7a1542afb542dfb2b89a03268a8d1d4e35e54635252b4ab0cdb28b212d11fbe", kill_on_drop: false }`
[INFO] [stdout] d7a1542afb542dfb2b89a03268a8d1d4e35e54635252b4ab0cdb28b212d11fbe