[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#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkuadra%2Fdumbo" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kuadra/dumbo on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-6-tc1/source/Cargo.toml
[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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.16
[INFO] [stderr]   Downloaded syn v1.0.89
[INFO] [stderr]   Downloaded mio v0.8.2
[INFO] [stderr]   Downloaded libc v0.2.121
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4fbc5a1357735fa218b4dde9cc4ebc65e1b58e88f9d073a279f79f215447b5c
[INFO] running `Command { std: "docker" "start" "-a" "a4fbc5a1357735fa218b4dde9cc4ebc65e1b58e88f9d073a279f79f215447b5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4fbc5a1357735fa218b4dde9cc4ebc65e1b58e88f9d073a279f79f215447b5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4fbc5a1357735fa218b4dde9cc4ebc65e1b58e88f9d073a279f79f215447b5c", kill_on_drop: false }`
[INFO] [stdout] a4fbc5a1357735fa218b4dde9cc4ebc65e1b58e88f9d073a279f79f215447b5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05ebcbab52b87d00222633c045e1fdb437d7c021b18b2105657d9440a786e63b
[INFO] running `Command { std: "docker" "start" "-a" "05ebcbab52b87d00222633c045e1fdb437d7c021b18b2105657d9440a786e63b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.1
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking pin-project-lite v0.2.8
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking socket2 v0.4.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking mio v0.8.2
[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] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.57s
[INFO] running `Command { std: "docker" "inspect" "05ebcbab52b87d00222633c045e1fdb437d7c021b18b2105657d9440a786e63b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05ebcbab52b87d00222633c045e1fdb437d7c021b18b2105657d9440a786e63b", kill_on_drop: false }`
[INFO] [stdout] 05ebcbab52b87d00222633c045e1fdb437d7c021b18b2105657d9440a786e63b