[INFO] cloning repository https://github.com/ninjapiraatti/rustsandbox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ninjapiraatti/rustsandbox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fninjapiraatti%2Frustsandbox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fninjapiraatti%2Frustsandbox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 41588e61a88df0a9f1d7d4f2433f43a0bc3130f4
[INFO] checking ninjapiraatti/rustsandbox against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fninjapiraatti%2Frustsandbox" "/workspace/builds/worker-59/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-59/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ninjapiraatti/rustsandbox on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ninjapiraatti/rustsandbox
[INFO] finished tweaking git repo https://github.com/ninjapiraatti/rustsandbox
[INFO] tweaked toml for git repo https://github.com/ninjapiraatti/rustsandbox written to /workspace/builds/worker-59/source/Cargo.toml
[INFO] crate git repo https://github.com/ninjapiraatti/rustsandbox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 46e6e2ba05b0a770989c467b607d356988aa763d367d14dd3694339961c1898d
[INFO] running `Command { std: "docker" "start" "-a" "46e6e2ba05b0a770989c467b607d356988aa763d367d14dd3694339961c1898d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46e6e2ba05b0a770989c467b607d356988aa763d367d14dd3694339961c1898d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46e6e2ba05b0a770989c467b607d356988aa763d367d14dd3694339961c1898d", kill_on_drop: false }`
[INFO] [stdout] 46e6e2ba05b0a770989c467b607d356988aa763d367d14dd3694339961c1898d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bda884e5f38df4e4e8308f949c0c31a7aa70f3bbb9bb44179af1dd0601403d16
[INFO] running `Command { std: "docker" "start" "-a" "bda884e5f38df4e4e8308f949c0c31a7aa70f3bbb9bb44179af1dd0601403d16", kill_on_drop: false }`
[INFO] [stderr]     Checking helloworld v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `square`
[INFO] [stdout]   --> src/codewars/codewars_interlaced.rs:51:17
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut square = build_square(res.len());
[INFO] [stdout]    |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_square`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `square`
[INFO] [stdout]   --> src/codewars/codewars_interlaced.rs:51:17
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut square = build_square(res.len());
[INFO] [stdout]    |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_square`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/codewars/codewars_interlaced.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let mut square = Vec::with_capacity(size*size);
[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/codewars/codewars_interlaced.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut square = build_square(res.len());
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/codewars/codewars_interlaced.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let mut square = Vec::with_capacity(size*size);
[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/codewars/codewars_interlaced.rs:51:13
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let mut square = build_square(res.len());
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]  --> src/basics/boxx.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub name: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]  --> src/basics/oopish.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub name: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `decode`
[INFO] [stdout]   --> src/codewars/codewars_interlaced.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn decode(s: &str) -> String {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]  --> src/basics/boxx.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub name: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]  --> src/basics/oopish.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub name: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bda884e5f38df4e4e8308f949c0c31a7aa70f3bbb9bb44179af1dd0601403d16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bda884e5f38df4e4e8308f949c0c31a7aa70f3bbb9bb44179af1dd0601403d16", kill_on_drop: false }`
[INFO] [stdout] bda884e5f38df4e4e8308f949c0c31a7aa70f3bbb9bb44179af1dd0601403d16