[INFO] cloning repository https://github.com/walf443/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/walf443/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwalf443%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwalf443%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a65e053b77c2fe72f7aa59dc1e69b93b2e2f569
[INFO] checking walf443/learn-rust against master#2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4 for pr-84385
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwalf443%2Flearn-rust" "/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/walf443/learn-rust on toolchain 2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/walf443/learn-rust
[INFO] finished tweaking git repo https://github.com/walf443/learn-rust
[INFO] tweaked toml for git repo https://github.com/walf443/learn-rust written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/walf443/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded axum v0.5.5
[INFO] [stderr]   Downloaded prost v0.10.3
[INFO] [stderr]   Downloaded google-api-proto v1.79.0
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 519c98b9fbdd04ecc75a003cc538c797e8094af761fe7390450e5f85430b50fb
[INFO] running `Command { std: "docker" "start" "-a" "519c98b9fbdd04ecc75a003cc538c797e8094af761fe7390450e5f85430b50fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "519c98b9fbdd04ecc75a003cc538c797e8094af761fe7390450e5f85430b50fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "519c98b9fbdd04ecc75a003cc538c797e8094af761fe7390450e5f85430b50fb", kill_on_drop: false }`
[INFO] [stdout] 519c98b9fbdd04ecc75a003cc538c797e8094af761fe7390450e5f85430b50fb
[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" "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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+2d3a85b4f8ba7e2554f4d4fee126bc2ac6ee2af4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d46d6732791955c4bc3a1eff1592e4d5e8a2734a3444a8eefb8f2251f6e4c6c3
[INFO] running `Command { std: "docker" "start" "-a" "d46d6732791955c4bc3a1eff1592e4d5e8a2734a3444a8eefb8f2251f6e4c6c3", kill_on_drop: false }`
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[INFO] [stderr]    Compiling unicode-xid v0.2.3
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[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]     Checking cfg-if v1.0.0
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[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]     Checking smallvec v1.8.0
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[INFO] [stderr]    Compiling parking_lot_core v0.9.3
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[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking once_cell v1.10.0
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[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking regex-syntax v0.6.25
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[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking fnv v1.0.7
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[INFO] [stderr]    Compiling anyhow v1.0.57
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[INFO] [stderr]     Checking atoi v0.3.3
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[INFO] [stderr]    Compiling tracing-attributes v0.1.21
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[INFO] [stderr]    Compiling async-stream-impl v0.3.3
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[INFO] [stderr]    Compiling prost-derive v0.10.1
[INFO] [stderr]     Checking tokio v1.18.2
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[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking tracing v0.1.34
[INFO] [stderr]     Checking learn-rust v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking axum-core v0.2.4
[INFO] [stderr]     Checking tokio-stream v0.1.8
[INFO] [stderr]     Checking tokio-util v0.7.1
[INFO] [stderr]     Checking tokio-io-timeout v1.2.0
[INFO] [stderr]     Checking prost v0.10.3
[INFO] [stderr]     Checking mini-redis v0.4.1
[INFO] [stderr]     Checking prost-types v0.10.1
[INFO] [stderr]     Checking h2 v0.3.13
[INFO] [stderr]     Checking tower v0.4.12
[INFO] [stderr]     Checking my-redis v0.1.0 (/opt/rustwide/workdir/my-redis)
[INFO] [stdout] warning: unused import: `std::string::FromUtf8Error`
[INFO] [stdout]  --> my-redis/examples/async_read_to_end.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::string::FromUtf8Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mini_redis::Command::Set`
[INFO] [stdout]  --> my-redis/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mini_redis::Command::Set;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> my-redis/src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Mutex`
[INFO] [stdout]  --> my-redis/src/main.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mini_redis::Command::Set`
[INFO] [stdout]  --> my-redis/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mini_redis::Command::Set;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> my-redis/src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Mutex`
[INFO] [stdout]  --> my-redis/src/main.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                      ^^^^^
[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] [stdout] warning: unreachable expression
[INFO] [stdout]   --> my-redis/examples/echo_server.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | /     loop {
[INFO] [stdout] 9  | |         let (mut socket, _) = listener.accept().await?;
[INFO] [stdout] 10 | |
[INFO] [stdout] 11 | |         tokio::spawn(async move {
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | |         });
[INFO] [stdout] 17 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 18 |
[INFO] [stdout] 19 |       Ok(())
[INFO] [stdout]    |       ^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tower-http v0.3.3
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking hyper v0.14.18
[INFO] [stderr]     Checking hyper-timeout v0.4.1
[INFO] [stderr]     Checking axum v0.5.5
[INFO] [stderr]     Checking tonic v0.7.2
[INFO] [stderr]     Checking google-api-proto v1.79.0
[INFO] [stderr]     Checking pubsub-sample v0.1.0 (/opt/rustwide/workdir/pubsub-sample)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.84s
[INFO] running `Command { std: "docker" "inspect" "d46d6732791955c4bc3a1eff1592e4d5e8a2734a3444a8eefb8f2251f6e4c6c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d46d6732791955c4bc3a1eff1592e4d5e8a2734a3444a8eefb8f2251f6e4c6c3", kill_on_drop: false }`
[INFO] [stdout] d46d6732791955c4bc3a1eff1592e4d5e8a2734a3444a8eefb8f2251f6e4c6c3