[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#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreboy%2Frworld" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/preboy/rworld on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "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-7/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" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 100827a8c5e5094b3868c20d96888666057d25b9d4520212366f2156313c02c1
[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" "100827a8c5e5094b3868c20d96888666057d25b9d4520212366f2156313c02c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "100827a8c5e5094b3868c20d96888666057d25b9d4520212366f2156313c02c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "100827a8c5e5094b3868c20d96888666057d25b9d4520212366f2156313c02c1", kill_on_drop: false }`
[INFO] [stdout] 100827a8c5e5094b3868c20d96888666057d25b9d4520212366f2156313c02c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6af8bc51b88b2242552ffe995317d1e26076c57b752ec3c4d980a50753741a68
[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" "6af8bc51b88b2242552ffe995317d1e26076c57b752ec3c4d980a50753741a68", 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 0.69s
[INFO] running `Command { std: "docker" "inspect" "6af8bc51b88b2242552ffe995317d1e26076c57b752ec3c4d980a50753741a68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6af8bc51b88b2242552ffe995317d1e26076c57b752ec3c4d980a50753741a68", kill_on_drop: false }`
[INFO] [stdout] 6af8bc51b88b2242552ffe995317d1e26076c57b752ec3c4d980a50753741a68