[INFO] cloning repository https://github.com/thomas-zahner/middleware
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thomas-zahner/middleware" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas-zahner%2Fmiddleware", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas-zahner%2Fmiddleware'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 811be67b12a21a0dbd2f7371bde0e34f05556d07
[INFO] checking thomas-zahner/middleware against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas-zahner%2Fmiddleware" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thomas-zahner/middleware on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thomas-zahner/middleware
[INFO] finished tweaking git repo https://github.com/thomas-zahner/middleware
[INFO] tweaked toml for git repo https://github.com/thomas-zahner/middleware written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/thomas-zahner/middleware 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce690d6bcfcf124287ec9cbbd2bf60f183ed7e93e0568d97bea5f373a003ee67
[INFO] running `Command { std: "docker" "start" "-a" "ce690d6bcfcf124287ec9cbbd2bf60f183ed7e93e0568d97bea5f373a003ee67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce690d6bcfcf124287ec9cbbd2bf60f183ed7e93e0568d97bea5f373a003ee67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce690d6bcfcf124287ec9cbbd2bf60f183ed7e93e0568d97bea5f373a003ee67", kill_on_drop: false }`
[INFO] [stdout] ce690d6bcfcf124287ec9cbbd2bf60f183ed7e93e0568d97bea5f373a003ee67
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91225b3bdc71b2e8c83319535f270a992ed0b014db903d8123c5da17948c88e2
[INFO] running `Command { std: "docker" "start" "-a" "91225b3bdc71b2e8c83319535f270a992ed0b014db903d8123c5da17948c88e2", kill_on_drop: false }`
[INFO] [stderr]     Checking middleware v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Chain`, `traverse`
[INFO] [stdout]   --> src/chain/mod.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |     use super::{traverse, Chain, Chainable};
[INFO] [stdout]    |                 ^^^^^^^^  ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `handle` is never used
[INFO] [stdout]   --> src/middleware/mod.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub trait Middleware {
[INFO] [stdout]    |           ---------- method in this trait
[INFO] [stdout] 18 |     fn handle(&mut self, req: Request, next: NextFunction) -> Response;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `traverse` is never used
[INFO] [stdout]   --> src/middleware/mod.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn traverse(req: Request, mut iter: IntoIter<Box<dyn Middleware>>) -> Response {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Chainable` is never used
[INFO] [stdout]  --> src/chain/mod.rs:1:18
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub(crate) trait Chainable<T> {
[INFO] [stdout]   |                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Chain` is never used
[INFO] [stdout]  --> src/chain/mod.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | type Chain<T> = Vec<Box<dyn Chainable<T>>>;
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `traverse` is never used
[INFO] [stdout]  --> src/chain/mod.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn traverse<T>(chain: Chain<T>, mut input: T) -> T {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Add` is never constructed
[INFO] [stdout]   --> src/chain/mod.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |     struct Add(i64);
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sub` is never constructed
[INFO] [stdout]   --> src/chain/mod.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     struct Sub(i64);
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Request` is never constructed
[INFO] [stdout]   --> src/chain/mod.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     struct Request(i64);
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "91225b3bdc71b2e8c83319535f270a992ed0b014db903d8123c5da17948c88e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91225b3bdc71b2e8c83319535f270a992ed0b014db903d8123c5da17948c88e2", kill_on_drop: false }`
[INFO] [stdout] 91225b3bdc71b2e8c83319535f270a992ed0b014db903d8123c5da17948c88e2