[INFO] cloning repository https://github.com/syunta/Scheme-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/syunta/Scheme-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsyunta%2FScheme-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsyunta%2FScheme-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e7028d38a4a6210d18b2643971953d2e744ba596
[INFO] testing syunta/Scheme-rs against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsyunta%2FScheme-rs" "/workspace/builds/worker-23/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-23/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/syunta/Scheme-rs on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/syunta/Scheme-rs
[INFO] finished tweaking git repo https://github.com/syunta/Scheme-rs
[INFO] tweaked toml for git repo https://github.com/syunta/Scheme-rs written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate git repo https://github.com/syunta/Scheme-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e05209f0bdbd5fa50986475124f78bc3dd5136c13475e733b0f74ba197ed6ce
[INFO] running `Command { std: "docker" "start" "-a" "8e05209f0bdbd5fa50986475124f78bc3dd5136c13475e733b0f74ba197ed6ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e05209f0bdbd5fa50986475124f78bc3dd5136c13475e733b0f74ba197ed6ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e05209f0bdbd5fa50986475124f78bc3dd5136c13475e733b0f74ba197ed6ce", kill_on_drop: false }`
[INFO] [stdout] 8e05209f0bdbd5fa50986475124f78bc3dd5136c13475e733b0f74ba197ed6ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b2166929fed672ecf58c01b341384894e06acc74a94ea8c488cda31d859b8b2
[INFO] running `Command { std: "docker" "start" "-a" "6b2166929fed672ecf58c01b341384894e06acc74a94ea8c488cda31d859b8b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling scheme-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/data.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt;
[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/data.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cdr`
[INFO] [stdout]   --> src/memory.rs:17:19
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn cons(car: Obj, cdr: Obj) -> Obj {
[INFO] [stdout]    |                   ^^^ help: if this is intentional, prefix it with an underscore: `_cdr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/memory.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut mem = Memory { cars: HashMap::new(), cdrs: HashMap::new() };
[INFO] [stdout]   |         ----^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0133]: use of mutable static is unsafe and requires unsafe function or block
[INFO] [stdout]   --> src/memory.rs:19:38
[INFO] [stdout]    |
[INFO] [stdout] 19 |         mem.borrow_mut().cars.insert(FREE_PTR, car);
[INFO] [stdout]    |                                      ^^^^^^^^ use of mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: mutable statics can be mutated by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0133`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `scheme-rs`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6b2166929fed672ecf58c01b341384894e06acc74a94ea8c488cda31d859b8b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b2166929fed672ecf58c01b341384894e06acc74a94ea8c488cda31d859b8b2", kill_on_drop: false }`
[INFO] [stdout] 6b2166929fed672ecf58c01b341384894e06acc74a94ea8c488cda31d859b8b2
