[INFO] cloning repository https://github.com/kuadra/dumbo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kuadra/dumbo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkuadra%2Fdumbo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkuadra%2Fdumbo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 05386a52d390a796b9e7f09d7f46ada9b0e879e5
[INFO] checking kuadra/dumbo against master#9748d87dc70a9a6725c5dbd76ce29d04752b4f90 for pr-144156
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkuadra%2Fdumbo" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kuadra/dumbo
[INFO] finished tweaking git repo https://github.com/kuadra/dumbo
[INFO] tweaked toml for git repo https://github.com/kuadra/dumbo written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kuadra/dumbo on toolchain 9748d87dc70a9a6725c5dbd76ce29d04752b4f90
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kuadra/dumbo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4d81e1811da0acecbafc220bfd056120a16059794666f04592e6040dcbee9ef0
[INFO] running `Command { std: "docker" "start" "-a" "4d81e1811da0acecbafc220bfd056120a16059794666f04592e6040dcbee9ef0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d81e1811da0acecbafc220bfd056120a16059794666f04592e6040dcbee9ef0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d81e1811da0acecbafc220bfd056120a16059794666f04592e6040dcbee9ef0", kill_on_drop: false }`
[INFO] [stdout] 4d81e1811da0acecbafc220bfd056120a16059794666f04592e6040dcbee9ef0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+9748d87dc70a9a6725c5dbd76ce29d04752b4f90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf45be02aa4c71bd381b7e7d102de89ce61de9c58d59a9e8401034a97cfbd4e5
[INFO] running `Command { std: "docker" "start" "-a" "cf45be02aa4c71bd381b7e7d102de89ce61de9c58d59a9e8401034a97cfbd4e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking mio v0.8.2
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]     Checking tokio v1.17.0
[INFO] [stderr]     Checking dumbo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `io::AsyncReadExt`
[INFO] [stdout]  --> src/main.rs:3:44
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::{net::{TcpListener, TcpStream}, io::AsyncReadExt};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io::AsyncReadExt`
[INFO] [stdout]  --> src/main.rs:3:44
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::{net::{TcpListener, TcpStream}, io::AsyncReadExt};
[INFO] [stdout]   |                                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/buffo.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn ppp(mut self) -> Buffo{
[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/buffo.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn ppp(mut self) -> Buffo{
[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: method `ppp` is never used
[INFO] [stdout]  --> src/buffo.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Buffo {
[INFO] [stdout]   | ---------- method in this implementation
[INFO] [stdout] 6 |     pub fn ppp(mut self) -> Buffo{
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `ppp` is never used
[INFO] [stdout]  --> src/buffo.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Buffo {
[INFO] [stdout]   | ---------- method in this implementation
[INFO] [stdout] 6 |     pub fn ppp(mut self) -> Buffo{
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.22s
[INFO] running `Command { std: "docker" "inspect" "cf45be02aa4c71bd381b7e7d102de89ce61de9c58d59a9e8401034a97cfbd4e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf45be02aa4c71bd381b7e7d102de89ce61de9c58d59a9e8401034a97cfbd4e5", kill_on_drop: false }`
[INFO] [stdout] cf45be02aa4c71bd381b7e7d102de89ce61de9c58d59a9e8401034a97cfbd4e5