[INFO] cloning repository https://github.com/giovannicuccu/one-billion-row-challenge-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/giovannicuccu/one-billion-row-challenge-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgiovannicuccu%2Fone-billion-row-challenge-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgiovannicuccu%2Fone-billion-row-challenge-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 49a0bf0413b21240c8ffd0320bae71ad7f3b1c5c
[INFO] checking giovannicuccu/one-billion-row-challenge-rust against master#667247db71ea18c4130dd018d060e7f09d589490 for pr-140824
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgiovannicuccu%2Fone-billion-row-challenge-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] validating manifest of git repo https://github.com/giovannicuccu/one-billion-row-challenge-rust on toolchain 667247db71ea18c4130dd018d060e7f09d589490
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+667247db71ea18c4130dd018d060e7f09d589490" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/giovannicuccu/one-billion-row-challenge-rust
[INFO] finished tweaking git repo https://github.com/giovannicuccu/one-billion-row-challenge-rust
[INFO] tweaked toml for git repo https://github.com/giovannicuccu/one-billion-row-challenge-rust written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/giovannicuccu/one-billion-row-challenge-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" "+667247db71ea18c4130dd018d060e7f09d589490" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+667247db71ea18c4130dd018d060e7f09d589490" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0288ab9b4210d220aaf7b1039bcf9da39f897270e7fb2d721c20dd7ff19296fd
[INFO] running `Command { std: "docker" "start" "-a" "0288ab9b4210d220aaf7b1039bcf9da39f897270e7fb2d721c20dd7ff19296fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0288ab9b4210d220aaf7b1039bcf9da39f897270e7fb2d721c20dd7ff19296fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0288ab9b4210d220aaf7b1039bcf9da39f897270e7fb2d721c20dd7ff19296fd", kill_on_drop: false }`
[INFO] [stdout] 0288ab9b4210d220aaf7b1039bcf9da39f897270e7fb2d721c20dd7ff19296fd
[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=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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+667247db71ea18c4130dd018d060e7f09d589490" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fc2d4b29830a71c229081e997479d211161077fa35183eab9d6d7b03eef17b9
[INFO] running `Command { std: "docker" "start" "-a" "4fc2d4b29830a71c229081e997479d211161077fa35183eab9d6d7b03eef17b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking memmap2 v0.9.4
[INFO] [stderr]     Checking one-billion-row-challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `fs`, `io::Read`, and `sync::Arc`
[INFO] [stdout]  --> src/main.rs:1:44
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, env::args, fs, io::Read, sync::Arc, thread::available_parallelism, usize};
[INFO] [stdout]   |                                            ^^  ^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `io::Read` and `sync::Arc`
[INFO] [stdout]  --> src/main.rs:1:48
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, env::args, fs, io::Read, sync::Arc, thread::available_parallelism, usize};
[INFO] [stdout]   |                                                ^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:408:13
[INFO] [stdout]     |
[INFO] [stdout] 408 |         let mut file = std::fs::File::open(filename).unwrap();
[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] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:408:13
[INFO] [stdout]     |
[INFO] [stdout] 408 |         let mut file = std::fs::File::open(filename).unwrap();
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.69s
[INFO] running `Command { std: "docker" "inspect" "4fc2d4b29830a71c229081e997479d211161077fa35183eab9d6d7b03eef17b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fc2d4b29830a71c229081e997479d211161077fa35183eab9d6d7b03eef17b9", kill_on_drop: false }`
[INFO] [stdout] 4fc2d4b29830a71c229081e997479d211161077fa35183eab9d6d7b03eef17b9