[INFO] cloning repository https://github.com/BaiXinKe/Monkey
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BaiXinKe/Monkey" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBaiXinKe%2FMonkey", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBaiXinKe%2FMonkey'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7bcd55acfd5ebb2889e8b46dcb667e3b3374fc2d
[INFO] testing BaiXinKe/Monkey against 1.75.0 for beta-1.76-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBaiXinKe%2FMonkey" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BaiXinKe/Monkey on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BaiXinKe/Monkey
[INFO] finished tweaking git repo https://github.com/BaiXinKe/Monkey
[INFO] tweaked toml for git repo https://github.com/BaiXinKe/Monkey written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/BaiXinKe/Monkey 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c98d6553b6ec5e6f171929b1919ed048efcea79c8156825142f3fd0cd7d76219
[INFO] running `Command { std: "docker" "start" "-a" "c98d6553b6ec5e6f171929b1919ed048efcea79c8156825142f3fd0cd7d76219", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c98d6553b6ec5e6f171929b1919ed048efcea79c8156825142f3fd0cd7d76219", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c98d6553b6ec5e6f171929b1919ed048efcea79c8156825142f3fd0cd7d76219", kill_on_drop: false }`
[INFO] [stdout] c98d6553b6ec5e6f171929b1919ed048efcea79c8156825142f3fd0cd7d76219
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 023c3dcbceb38bf8897b0be7f690fef20a6d071a9cab3f1da00c11803358b35f
[INFO] running `Command { std: "docker" "start" "-a" "023c3dcbceb38bf8897b0be7f690fef20a6d071a9cab3f1da00c11803358b35f", kill_on_drop: false }`
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling monkey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Identifier`
[INFO] [stdout]  --> src/parser.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ast::{self, Identifier, Statement},
[INFO] [stdout]   |                 ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(downcast_unchecked)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `monkey` (bin "monkey") due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "023c3dcbceb38bf8897b0be7f690fef20a6d071a9cab3f1da00c11803358b35f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "023c3dcbceb38bf8897b0be7f690fef20a6d071a9cab3f1da00c11803358b35f", kill_on_drop: false }`
[INFO] [stdout] 023c3dcbceb38bf8897b0be7f690fef20a6d071a9cab3f1da00c11803358b35f
