[INFO] cloning repository https://github.com/PierreLeidbring/brainrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PierreLeidbring/brainrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPierreLeidbring%2Fbrainrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPierreLeidbring%2Fbrainrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6851e00f4ee404caa3aa61b1fe728de4b9530836
[INFO] checking PierreLeidbring/brainrust against try#5d9095c550fcec9e458ce8d6b0c04a217641db66 for pr-77153
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPierreLeidbring%2Fbrainrust" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PierreLeidbring/brainrust on toolchain 5d9095c550fcec9e458ce8d6b0c04a217641db66
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PierreLeidbring/brainrust
[INFO] finished tweaking git repo https://github.com/PierreLeidbring/brainrust
[INFO] tweaked toml for git repo https://github.com/PierreLeidbring/brainrust written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/PierreLeidbring/brainrust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c576417c4a0d60e984ce353f6b34c19035d7084c2a58d0175be8a1566a9fc2c2
[INFO] running `Command { std: "docker" "start" "-a" "c576417c4a0d60e984ce353f6b34c19035d7084c2a58d0175be8a1566a9fc2c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c576417c4a0d60e984ce353f6b34c19035d7084c2a58d0175be8a1566a9fc2c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c576417c4a0d60e984ce353f6b34c19035d7084c2a58d0175be8a1566a9fc2c2", kill_on_drop: false }`
[INFO] [stdout] c576417c4a0d60e984ce353f6b34c19035d7084c2a58d0175be8a1566a9fc2c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+5d9095c550fcec9e458ce8d6b0c04a217641db66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 26d54c26267cca0b1ffe78c77a1a9fa9d217194007e8470caa367d402151f7a5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "26d54c26267cca0b1ffe78c77a1a9fa9d217194007e8470caa367d402151f7a5", kill_on_drop: false }`
[INFO] [stderr]     Checking brainrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs;
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "26d54c26267cca0b1ffe78c77a1a9fa9d217194007e8470caa367d402151f7a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26d54c26267cca0b1ffe78c77a1a9fa9d217194007e8470caa367d402151f7a5", kill_on_drop: false }`
[INFO] [stdout] 26d54c26267cca0b1ffe78c77a1a9fa9d217194007e8470caa367d402151f7a5