[INFO] cloning repository https://github.com/reccanti/ProjectEuler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/reccanti/ProjectEuler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freccanti%2FProjectEuler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freccanti%2FProjectEuler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e50d0dcc61a844d09f1212af9730dd874a6ffdd8
[INFO] checking reccanti/ProjectEuler against master#9503ea19edbf01b9435e80e17d60ce1b88390116 for pr-81782
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Freccanti%2FProjectEuler" "/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/reccanti/ProjectEuler on toolchain 9503ea19edbf01b9435e80e17d60ce1b88390116
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/reccanti/ProjectEuler
[INFO] finished tweaking git repo https://github.com/reccanti/ProjectEuler
[INFO] tweaked toml for git repo https://github.com/reccanti/ProjectEuler written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/reccanti/ProjectEuler already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "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] 5c9830f38dc13dab55549de58a88eaa96625fdf3ac044d4da7d744d63ed6069c
[INFO] running `Command { std: "docker" "start" "-a" "5c9830f38dc13dab55549de58a88eaa96625fdf3ac044d4da7d744d63ed6069c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c9830f38dc13dab55549de58a88eaa96625fdf3ac044d4da7d744d63ed6069c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c9830f38dc13dab55549de58a88eaa96625fdf3ac044d4da7d744d63ed6069c", kill_on_drop: false }`
[INFO] [stdout] 5c9830f38dc13dab55549de58a88eaa96625fdf3ac044d4da7d744d63ed6069c
[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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9503ea19edbf01b9435e80e17d60ce1b88390116" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 88535925e1b74ec4e381ebe575c72709d71d88b6862873c3b5a196cdce96633e
[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" "88535925e1b74ec4e381ebe575c72709d71d88b6862873c3b5a196cdce96633e", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]     Checking problem_1 v0.1.0 (/opt/rustwide/workdir/problem_1)
[INFO] [stdout] warning: unused import: `test::Bencher`
[INFO] [stdout]  --> problem_1/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use test::Bencher;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_sum_three_five_multiples`
[INFO] [stdout]  --> problem_1/src/main.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn get_sum_three_five_multiples(start: u32) -> u32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking num-integer v0.1.39
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking problem_2 v0.1.0 (/opt/rustwide/workdir/problem_2)
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> problem_2/src/main.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::time::{Duration, SystemTime};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `test::Bencher`
[INFO] [stdout]  --> problem_2/src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use test::Bencher;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]  --> problem_2/src/main.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::time::{Duration, SystemTime};
[INFO] [stdout]   |                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `test::Bencher`
[INFO] [stdout]  --> problem_2/src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use test::Bencher;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `naive_sum_even_fibonacci`
[INFO] [stdout]   --> problem_2/src/main.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn naive_sum_even_fibonacci (amount: u32) -> BigUint {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 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 8.16s
[INFO] running `Command { std: "docker" "inspect" "88535925e1b74ec4e381ebe575c72709d71d88b6862873c3b5a196cdce96633e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88535925e1b74ec4e381ebe575c72709d71d88b6862873c3b5a196cdce96633e", kill_on_drop: false }`
[INFO] [stdout] 88535925e1b74ec4e381ebe575c72709d71d88b6862873c3b5a196cdce96633e