[INFO] cloning repository https://github.com/europeanplaice/Accept-Reject-Sampling-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/europeanplaice/Accept-Reject-Sampling-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feuropeanplaice%2FAccept-Reject-Sampling-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feuropeanplaice%2FAccept-Reject-Sampling-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a443a88248ded8b908d1fbda69ea2bd60802f1df
[INFO] testing europeanplaice/Accept-Reject-Sampling-Rust against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feuropeanplaice%2FAccept-Reject-Sampling-Rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/europeanplaice/Accept-Reject-Sampling-Rust
[INFO] finished tweaking git repo https://github.com/europeanplaice/Accept-Reject-Sampling-Rust
[INFO] tweaked toml for git repo https://github.com/europeanplaice/Accept-Reject-Sampling-Rust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/europeanplaice/Accept-Reject-Sampling-Rust on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/europeanplaice/Accept-Reject-Sampling-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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] faee6a72f7f62c16f2a1f52e5fd2e18aa1bb28f8d65b6763d7902d1c0f982323
[INFO] running `Command { std: "docker" "start" "-a" "faee6a72f7f62c16f2a1f52e5fd2e18aa1bb28f8d65b6763d7902d1c0f982323", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "faee6a72f7f62c16f2a1f52e5fd2e18aa1bb28f8d65b6763d7902d1c0f982323", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faee6a72f7f62c16f2a1f52e5fd2e18aa1bb28f8d65b6763d7902d1c0f982323", kill_on_drop: false }`
[INFO] [stdout] faee6a72f7f62c16f2a1f52e5fd2e18aa1bb28f8d65b6763d7902d1c0f982323
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9ff5a42a759074ca96bbfd640eb685bce7e04bda1399587925bd28616a8f51a
[INFO] running `Command { std: "docker" "start" "-a" "c9ff5a42a759074ca96bbfd640eb685bce7e04bda1399587925bd28616a8f51a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling getrandom v0.2.8
[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 acceptance_rejection v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `csv`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use csv::Writer;
[INFO] [stdout]   |     ^^^ use of unresolved module or unlinked crate `csv`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `csv`, use `cargo add csv` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sample`
[INFO] [stdout]   --> src/main.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let sample = acceptance_rejection_sampling(target_fn, 1000);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample`
[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 E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `acceptance_rejection` (bin "acceptance_rejection") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "c9ff5a42a759074ca96bbfd640eb685bce7e04bda1399587925bd28616a8f51a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9ff5a42a759074ca96bbfd640eb685bce7e04bda1399587925bd28616a8f51a", kill_on_drop: false }`
[INFO] [stdout] c9ff5a42a759074ca96bbfd640eb685bce7e04bda1399587925bd28616a8f51a