[INFO] cloning repository https://github.com/FR4NC1SC011/ADC2019-RUST
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FR4NC1SC011/ADC2019-RUST" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFR4NC1SC011%2FADC2019-RUST", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFR4NC1SC011%2FADC2019-RUST'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f3ff5b74807cf4ba8033bc4a7c6c455f38ae5be2
[INFO] checking FR4NC1SC011/ADC2019-RUST against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFR4NC1SC011%2FADC2019-RUST" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FR4NC1SC011/ADC2019-RUST on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/FR4NC1SC011/ADC2019-RUST
[INFO] finished tweaking git repo https://github.com/FR4NC1SC011/ADC2019-RUST
[INFO] tweaked toml for git repo https://github.com/FR4NC1SC011/ADC2019-RUST written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/FR4NC1SC011/ADC2019-RUST already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e19f6984cd59bc1f890ee33e2c2244da0b29f9d7d1fd5a898ff10ef6878eb29
[INFO] running `Command { std: "docker" "start" "-a" "4e19f6984cd59bc1f890ee33e2c2244da0b29f9d7d1fd5a898ff10ef6878eb29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e19f6984cd59bc1f890ee33e2c2244da0b29f9d7d1fd5a898ff10ef6878eb29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e19f6984cd59bc1f890ee33e2c2244da0b29f9d7d1fd5a898ff10ef6878eb29", kill_on_drop: false }`
[INFO] [stdout] 4e19f6984cd59bc1f890ee33e2c2244da0b29f9d7d1fd5a898ff10ef6878eb29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a0798307c8fda2f46acf979bc1ba070d240c34d6f464ce93dca20d3bd3dfc73f
[INFO] running `Command { std: "docker" "start" "-a" "a0798307c8fda2f46acf979bc1ba070d240c34d6f464ce93dca20d3bd3dfc73f", kill_on_drop: false }`
[INFO] [stderr]     Checking ADC2019-RUST v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BufReader`
[INFO] [stdout]  --> src/second.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 |     io::{prelude::*, BufReader},
[INFO] [stdout]   |                      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufReader`
[INFO] [stdout]  --> src/second.rs:3:22
[INFO] [stdout]   |
[INFO] [stdout] 3 |     io::{prelude::*, BufReader},
[INFO] [stdout]   |                      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/second.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     for i in 0..vec_int.len() {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_a`
[INFO] [stdout]  --> src/first.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn first_a() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_b`
[INFO] [stdout]   --> src/first.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn first_b() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_file`
[INFO] [stdout]   --> src/first.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn read_file() -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `ADC2019_RUST` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `adc2019_rust`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/second.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     for i in 0..vec_int.len() {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_a`
[INFO] [stdout]  --> src/first.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn first_a() {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_b`
[INFO] [stdout]   --> src/first.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub fn first_b() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `read_file`
[INFO] [stdout]   --> src/first.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn read_file() -> Vec<String> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `ADC2019_RUST` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `adc2019_rust`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "a0798307c8fda2f46acf979bc1ba070d240c34d6f464ce93dca20d3bd3dfc73f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0798307c8fda2f46acf979bc1ba070d240c34d6f464ce93dca20d3bd3dfc73f", kill_on_drop: false }`
[INFO] [stdout] a0798307c8fda2f46acf979bc1ba070d240c34d6f464ce93dca20d3bd3dfc73f