[INFO] updating cached repository https://github.com/JAD3N/mc-server
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/JAD3N/mc-server
[INFO] [stderr]    5d0fa49..074e79e  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 074e79e456142d50e95902ce5142f6b6de906d57
[INFO] checking JAD3N/mc-server against try#3ae4c050387df9f7fbb379ee90ce8bf05e566870 for pr-70872
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJAD3N%2Fmc-server" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JAD3N/mc-server on toolchain 3ae4c050387df9f7fbb379ee90ce8bf05e566870
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/JAD3N/mc-server
[INFO] finished tweaking git repo https://github.com/JAD3N/mc-server
[INFO] tweaked toml for git repo https://github.com/JAD3N/mc-server written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/JAD3N/mc-server already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 16e3d3c28f1270888a2f7a16284077b778fe0421f942a1a82dcac69127ee97aa
[INFO] running `"docker" "start" "-a" "16e3d3c28f1270888a2f7a16284077b778fe0421f942a1a82dcac69127ee97aa"`
[INFO] [stderr]     Checking java-props v0.1.2
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking serde_json v1.0.50
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking serde-value v0.6.0
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking log4rs v0.11.0
[INFO] [stderr]     Checking mc-server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `MutexGuard`
[INFO] [stderr]   --> src/main.rs:15:29
[INFO] [stderr]    |
[INFO] [stderr] 15 | use std::sync::{Arc, Mutex, MutexGuard};
[INFO] [stderr]    |                             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `MutexGuard`
[INFO] [stderr]   --> src/main.rs:15:29
[INFO] [stderr]    |
[INFO] [stderr] 15 | use std::sync::{Arc, Mutex, MutexGuard};
[INFO] [stderr]    |                             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pool`
[INFO] [stderr]   --> src/server/server.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pool: ThreadPool,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Level`
[INFO] [stderr]  --> src/world/level/level.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Level {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/world/level/level.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new(dimension_name: &str) -> Level {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `pool`
[INFO] [stderr]   --> src/server/server.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pool: ThreadPool,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Level`
[INFO] [stderr]  --> src/world/level/level.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Level {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/world/level/level.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn new(dimension_name: &str) -> Level {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.01s
[INFO] running `"docker" "inspect" "16e3d3c28f1270888a2f7a16284077b778fe0421f942a1a82dcac69127ee97aa"`
[INFO] running `"docker" "rm" "-f" "16e3d3c28f1270888a2f7a16284077b778fe0421f942a1a82dcac69127ee97aa"`
[INFO] [stdout] 16e3d3c28f1270888a2f7a16284077b778fe0421f942a1a82dcac69127ee97aa