[INFO] cloning repository https://github.com/kironono/taicho
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kironono/taicho" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkironono%2Ftaicho", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkironono%2Ftaicho'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a769eca403cebc7d9c93bf04259f906a79b83f13
[INFO] checking kironono/taicho against a5689b034ad287112f709693384a37f1377eb9cc for pr-129249-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkironono%2Ftaicho" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kironono/taicho
[INFO] finished tweaking git repo https://github.com/kironono/taicho
[INFO] tweaked toml for git repo https://github.com/kironono/taicho written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kironono/taicho on toolchain a5689b034ad287112f709693384a37f1377eb9cc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kironono/taicho 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" "+a5689b034ad287112f709693384a37f1377eb9cc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 1957b00efd268d30e1a225a378af4704f0d63db7f6a7999e4dbd3fd5243b2b4e
[INFO] running `Command { std: "docker" "start" "1957b00efd268d30e1a225a378af4704f0d63db7f6a7999e4dbd3fd5243b2b4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1957b00efd268d30e1a225a378af4704f0d63db7f6a7999e4dbd3fd5243b2b4e", 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" "1957b00efd268d30e1a225a378af4704f0d63db7f6a7999e4dbd3fd5243b2b4e" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1957b00efd268d30e1a225a378af4704f0d63db7f6a7999e4dbd3fd5243b2b4e", 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" "1957b00efd268d30e1a225a378af4704f0d63db7f6a7999e4dbd3fd5243b2b4e" "/opt/rustwide/cargo-home/bin/cargo" "+a5689b034ad287112f709693384a37f1377eb9cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling tokio v1.11.0
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.28
[INFO] [stderr]     Checking thiserror v1.0.28
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking serde_yaml v0.8.20
[INFO] [stderr]     Checking taicho v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `config` is never read
[INFO] [stdout]   --> src/manager.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct TaskManager {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 25 |     pub config: Config,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TaskManager` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/task.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Output(Output),
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 20 -     Output(Output),
[INFO] [stdout] 20 +     Output(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: useless conversion to the same type: `Task`
[INFO] [stdout]   --> src/manager.rs:67:38
[INFO] [stdout]    |
[INFO] [stdout] 67 |                   let mut task: Task = Task::spawn(&program, Stdio::piped(), Stdio::piped())
[INFO] [stdout]    |  ______________________________________^
[INFO] [stdout] 68 | |                     .await
[INFO] [stdout] 69 | |                     .expect(&format!("failed to spawn {} task", tag))
[INFO] [stdout] 70 | |                     .into();
[INFO] [stdout]    | |___________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 69 -                     .expect(&format!("failed to spawn {} task", tag))
[INFO] [stdout] 70 -                     .into();
[INFO] [stdout] 69 +                     .expect(&format!("failed to spawn {} task", tag));
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 67 ~                 let mut task: Task = <Task as Into<_>>::into(Task::spawn(&program, Stdio::piped(), Stdio::piped())
[INFO] [stdout] 68 |                     .await
[INFO] [stdout] 69 ~                     .expect(&format!("failed to spawn {} task", tag)));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `config` is never read
[INFO] [stdout]   --> src/manager.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct TaskManager {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] 25 |     pub config: Config,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TaskManager` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/task.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Output(Output),
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 20 -     Output(Output),
[INFO] [stdout] 20 +     Output(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `taicho` (bin "taicho" test) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: useless conversion to the same type: `Task`
[INFO] [stdout]   --> src/manager.rs:67:38
[INFO] [stdout]    |
[INFO] [stdout] 67 |                   let mut task: Task = Task::spawn(&program, Stdio::piped(), Stdio::piped())
[INFO] [stdout]    |  ______________________________________^
[INFO] [stdout] 68 | |                     .await
[INFO] [stdout] 69 | |                     .expect(&format!("failed to spawn {} task", tag))
[INFO] [stdout] 70 | |                     .into();
[INFO] [stdout]    | |___________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 69 -                     .expect(&format!("failed to spawn {} task", tag))
[INFO] [stdout] 70 -                     .into();
[INFO] [stdout] 69 +                     .expect(&format!("failed to spawn {} task", tag));
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 67 ~                 let mut task: Task = <Task as Into<_>>::into(Task::spawn(&program, Stdio::piped(), Stdio::piped())
[INFO] [stdout] 68 |                     .await
[INFO] [stdout] 69 ~                     .expect(&format!("failed to spawn {} task", tag)));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `taicho` (bin "taicho") due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1957b00efd268d30e1a225a378af4704f0d63db7f6a7999e4dbd3fd5243b2b4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1957b00efd268d30e1a225a378af4704f0d63db7f6a7999e4dbd3fd5243b2b4e", kill_on_drop: false }`
[INFO] [stdout] 1957b00efd268d30e1a225a378af4704f0d63db7f6a7999e4dbd3fd5243b2b4e
