[INFO] cloning repository https://github.com/kjura/romulus-and-his-brother
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kjura/romulus-and-his-brother" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkjura%2Fromulus-and-his-brother", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkjura%2Fromulus-and-his-brother'...
[INFO] [stderr] fatal: error closing file /workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkjura%2Fromulus-and-his-brother/packed-refs.new: No space left on device
[WARN] Retrying crate fetch in 3 seconds (attempt 1)
[INFO] cloning repository https://github.com/kjura/romulus-and-his-brother
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kjura/romulus-and-his-brother" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkjura%2Fromulus-and-his-brother", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkjura%2Fromulus-and-his-brother'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 57adad92e1b2b3c5917f1e34f18b6dfb82757217
[INFO] checking kjura/romulus-and-his-brother against master#d14d202262d13df896b0c624b0cec6e4bfde631a for pr-143028
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkjura%2Fromulus-and-his-brother" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kjura/romulus-and-his-brother
[INFO] finished tweaking git repo https://github.com/kjura/romulus-and-his-brother
[INFO] tweaked toml for git repo https://github.com/kjura/romulus-and-his-brother written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kjura/romulus-and-his-brother on toolchain d14d202262d13df896b0c624b0cec6e4bfde631a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kjura/romulus-and-his-brother 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" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "fetch" "--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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e21e2bc883d47f74399304a9b82578d144a66b97f6baba6f2f4451691b2506e
[INFO] running `Command { std: "docker" "start" "-a" "7e21e2bc883d47f74399304a9b82578d144a66b97f6baba6f2f4451691b2506e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e21e2bc883d47f74399304a9b82578d144a66b97f6baba6f2f4451691b2506e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e21e2bc883d47f74399304a9b82578d144a66b97f6baba6f2f4451691b2506e", kill_on_drop: false }`
[INFO] [stdout] 7e21e2bc883d47f74399304a9b82578d144a66b97f6baba6f2f4451691b2506e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+d14d202262d13df896b0c624b0cec6e4bfde631a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bc133acc287bc47eb521f0163db77ea6ed0971fbb74a22c2129bb02bcfefbcf
[INFO] running `Command { std: "docker" "start" "-a" "2bc133acc287bc47eb521f0163db77ea6ed0971fbb74a22c2129bb02bcfefbcf", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-sandbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `collections::HashMap` and `hash::Hash`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, hash::Hash};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `collections::HashMap` and `hash::Hash`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, hash::Hash};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/main.rs:51:21
[INFO] [stdout]    |
[INFO] [stdout] 51 |         values.push((i * multiplier));
[INFO] [stdout]    |                     ^              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 51 -         values.push((i * multiplier));
[INFO] [stdout] 51 +         values.push(i * multiplier);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/main.rs:51:21
[INFO] [stdout]    |
[INFO] [stdout] 51 |         values.push((i * multiplier));
[INFO] [stdout]    |                     ^              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 51 -         values.push((i * multiplier));
[INFO] [stdout] 51 +         values.push(i * multiplier);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `roman`
[INFO] [stdout]  --> src/main.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn roman_as_num(roman: &str) -> u64 {
[INFO] [stdout]   |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_roman`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `roman`
[INFO] [stdout]  --> src/main.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn roman_as_num(roman: &str) -> u64 {
[INFO] [stdout]   |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_roman`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]  --> src/main.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn get_digits(number: i32) -> Vec<i32> {
[INFO] [stdout]   |               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `number`
[INFO] [stdout]  --> src/main.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn get_digits(number: i32) -> Vec<i32> {
[INFO] [stdout]   |               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_number`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `roman_as_num` is never used
[INFO] [stdout]  --> src/main.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn roman_as_num(roman: &str) -> u64 {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `roman_as_num` is never used
[INFO] [stdout]  --> src/main.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn roman_as_num(roman: &str) -> u64 {
[INFO] [stdout]   |    ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "2bc133acc287bc47eb521f0163db77ea6ed0971fbb74a22c2129bb02bcfefbcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bc133acc287bc47eb521f0163db77ea6ed0971fbb74a22c2129bb02bcfefbcf", kill_on_drop: false }`
[INFO] [stdout] 2bc133acc287bc47eb521f0163db77ea6ed0971fbb74a22c2129bb02bcfefbcf