[INFO] cloning repository https://github.com/preboy/rworld
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/preboy/rworld" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreboy%2Frworld", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreboy%2Frworld'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3780d47e6cc9861262c0f86007f8f92aac76700
[INFO] checking preboy/rworld against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreboy%2Frworld" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/preboy/rworld on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/preboy/rworld
[INFO] finished tweaking git repo https://github.com/preboy/rworld
[INFO] tweaked toml for git repo https://github.com/preboy/rworld written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/preboy/rworld already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f24c9fc76967ecc324932ddbcf1d80470278e0c81ad16493344bccdd135ba645
[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" "f24c9fc76967ecc324932ddbcf1d80470278e0c81ad16493344bccdd135ba645", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f24c9fc76967ecc324932ddbcf1d80470278e0c81ad16493344bccdd135ba645", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f24c9fc76967ecc324932ddbcf1d80470278e0c81ad16493344bccdd135ba645", kill_on_drop: false }`
[INFO] [stdout] f24c9fc76967ecc324932ddbcf1d80470278e0c81ad16493344bccdd135ba645
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b629c44ad9e2e4e7350b18299358b310ce26e0f128b7eadcdf3061ecb791b91a
[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" "b629c44ad9e2e4e7350b18299358b310ce26e0f128b7eadcdf3061ecb791b91a", kill_on_drop: false }`
[INFO] [stderr]     Checking rworld v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `post`
[INFO] [stdout]   --> src/looper.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn post(&self, v: i32) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TCPClient`
[INFO] [stdout]  --> src/network/tcp_client.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct TCPClient {}
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/network/tcp_client.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn new(addr: String) -> TCPClient {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `connect`
[INFO] [stdout]  --> src/network/tcp_client.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn connect() {}
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `post`
[INFO] [stdout]   --> src/network/tcp_server.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn post(&mut self, data: &[u8]) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/network/tcp_server.rs:112:12
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn get(&mut self, id: u32) -> Option<&Session> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `del`
[INFO] [stdout]    --> src/network/tcp_server.rs:116:12
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn del(&mut self, id: u32) {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `post`
[INFO] [stdout]   --> src/looper.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn post(&self, v: i32) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TCPClient`
[INFO] [stdout]  --> src/network/tcp_client.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct TCPClient {}
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/network/tcp_client.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     pub fn new(addr: String) -> TCPClient {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `connect`
[INFO] [stdout]  --> src/network/tcp_client.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn connect() {}
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `post`
[INFO] [stdout]   --> src/network/tcp_server.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     pub fn post(&mut self, data: &[u8]) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]    --> src/network/tcp_server.rs:112:12
[INFO] [stdout]     |
[INFO] [stdout] 112 |     pub fn get(&mut self, id: u32) -> Option<&Session> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `del`
[INFO] [stdout]    --> src/network/tcp_server.rs:116:12
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn del(&mut self, id: u32) {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "b629c44ad9e2e4e7350b18299358b310ce26e0f128b7eadcdf3061ecb791b91a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b629c44ad9e2e4e7350b18299358b310ce26e0f128b7eadcdf3061ecb791b91a", kill_on_drop: false }`
[INFO] [stdout] b629c44ad9e2e4e7350b18299358b310ce26e0f128b7eadcdf3061ecb791b91a