[INFO] cloning repository https://github.com/larvvae/playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/larvvae/playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flarvvae%2Fplayground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flarvvae%2Fplayground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86029851730bf921b834b68a021b0d0f099e2443
[INFO] checking larvvae/playground against try#09eeb2bacb9b40b2ed1d47f03177442c0632cda1 for pr-157710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flarvvae%2Fplayground" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/larvvae/playground
[INFO] finished tweaking git repo https://github.com/larvvae/playground
[INFO] tweaked toml for git repo https://github.com/larvvae/playground written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/larvvae/playground on toolchain 09eeb2bacb9b40b2ed1d47f03177442c0632cda1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/larvvae/playground 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" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "afa5628645f2bd1a5a10ce8ee375bc03578e5ba5805ce222e8bf61bfa4d40e21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "afa5628645f2bd1a5a10ce8ee375bc03578e5ba5805ce222e8bf61bfa4d40e21" "/opt/rustwide/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "afa5628645f2bd1a5a10ce8ee375bc03578e5ba5805ce222e8bf61bfa4d40e21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "afa5628645f2bd1a5a10ce8ee375bc03578e5ba5805ce222e8bf61bfa4d40e21" "/opt/rustwide/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stderr]     Checking raft v0.6.0-alpha (https://github.com/tikv/raft-rs.git?rev=f7f7d0121132ef6406b59fc774778285cd1477d6#f7f7d012)
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[INFO] [stdout] warning: unused imports: `AsyncRead` and `AsyncWrite`
[INFO] [stdout]  --> src/kf_log/log.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | use io::{AsyncRead, AsyncWrite};
[INFO] [stdout]   |          ^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AsyncRead` and `AsyncWrite`
[INFO] [stdout]  --> src/kf_log/log.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | use io::{AsyncRead, AsyncWrite};
[INFO] [stdout]   |          ^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/kf_log/writer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Path,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LoggedWriter`
[INFO] [stdout]   --> src/kf_log/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     LoggedWriter
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/kf_log/writer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Path,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `LoggedWriter`
[INFO] [stdout]   --> src/kf_log/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     LoggedWriter
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::prelude::*`
[INFO] [stdout]  --> src/tk_echo.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tokio::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::net::TcpListener`
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | use tokio::net::TcpListener;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::prelude::*`
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | use tokio::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::prelude::*`
[INFO] [stdout]  --> src/tk_echo.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tokio::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::net::TcpListener`
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | use tokio::net::TcpListener;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::prelude::*`
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | use tokio::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::stream::StreamExt`
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use futures::stream::StreamExt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `dir`, `meta`, `opts_paths`, `obj_paths`, and `log_paths` are never read
[INFO] [stdout]   --> src/kf_log/log.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub struct Log {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout]  9 |     /// path to this log directory
[INFO] [stdout] 10 |     dir: PathBuf,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     meta: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     opts_paths: Vec<PathBuf>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     obj_paths: Vec<PathBuf>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     log_paths: Vec<PathBuf>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LoggedReader` is never constructed
[INFO] [stdout]  --> src/kf_log/reader.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct LoggedReader {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LoggedWriter` is never constructed
[INFO] [stdout]   --> src/kf_log/writer.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct LoggedWriter<L> where L: AsRef<Log> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::stream::StreamExt`
[INFO] [stdout]   --> src/main.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | use futures::stream::StreamExt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `dir`, `meta`, `opts_paths`, `obj_paths`, and `log_paths` are never read
[INFO] [stdout]   --> src/kf_log/log.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub struct Log {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout]  9 |     /// path to this log directory
[INFO] [stdout] 10 |     dir: PathBuf,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     meta: PathBuf,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     opts_paths: Vec<PathBuf>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     obj_paths: Vec<PathBuf>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |     log_paths: Vec<PathBuf>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LoggedReader` is never constructed
[INFO] [stdout]  --> src/kf_log/reader.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct LoggedReader {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LoggedWriter` is never constructed
[INFO] [stdout]   --> src/kf_log/writer.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct LoggedWriter<L> where L: AsRef<Log> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.84s
[INFO] running `Command { std: "docker" "inspect" "afa5628645f2bd1a5a10ce8ee375bc03578e5ba5805ce222e8bf61bfa4d40e21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afa5628645f2bd1a5a10ce8ee375bc03578e5ba5805ce222e8bf61bfa4d40e21", kill_on_drop: false }`
[INFO] [stdout] afa5628645f2bd1a5a10ce8ee375bc03578e5ba5805ce222e8bf61bfa4d40e21
