[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] testing thomas-zahner/middleware against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthomas-zahner%2Fmiddleware" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[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-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/thomas-zahner/middleware on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cce508e787feed90b51735c79912f0ec0d4ac319fe9c1e0bd7617056c35ac711
[INFO] running `Command { std: "docker" "start" "-a" "cce508e787feed90b51735c79912f0ec0d4ac319fe9c1e0bd7617056c35ac711", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cce508e787feed90b51735c79912f0ec0d4ac319fe9c1e0bd7617056c35ac711", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cce508e787feed90b51735c79912f0ec0d4ac319fe9c1e0bd7617056c35ac711", kill_on_drop: false }`
[INFO] [stdout] cce508e787feed90b51735c79912f0ec0d4ac319fe9c1e0bd7617056c35ac711
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0405c6b344ecf8531e6b691c4f9f1fba4a7113ac8ecef36cfd751d81dde4c908
[INFO] running `Command { std: "docker" "start" "-a" "0405c6b344ecf8531e6b691c4f9f1fba4a7113ac8ecef36cfd751d81dde4c908", kill_on_drop: false }`
[INFO] [stderr]    Compiling middleware v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Chain` and `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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rewrite` is never constructed
[INFO] [stdout]  --> src/middlewares/mod.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Rewrite {}
[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 `Check` is never constructed
[INFO] [stdout]   --> src/middlewares/mod.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Check {}
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cache` is never constructed
[INFO] [stdout]   --> src/middlewares/mod.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct Cache {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Request` is never constructed
[INFO] [stdout]  --> src/middleware/mod.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) struct Request {
[INFO] [stdout]   |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Response` is never constructed
[INFO] [stdout]   --> src/middleware/mod.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub(crate) struct Response {
[INFO] [stdout]    |                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NextFunction` is never used
[INFO] [stdout]   --> src/middleware/mod.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub type NextFunction = Box<dyn FnOnce(Request) -> Response>;
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Middleware` is never used
[INFO] [stdout]   --> src/middleware/mod.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub trait Middleware {
[INFO] [stdout]    |           ^^^^^^^^^^
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.32s
[INFO] running `Command { std: "docker" "inspect" "0405c6b344ecf8531e6b691c4f9f1fba4a7113ac8ecef36cfd751d81dde4c908", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0405c6b344ecf8531e6b691c4f9f1fba4a7113ac8ecef36cfd751d81dde4c908", kill_on_drop: false }`
[INFO] [stdout] 0405c6b344ecf8531e6b691c4f9f1fba4a7113ac8ecef36cfd751d81dde4c908
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2d1bcfe00b01f8e8ce6214f3802cfa6c5bc67e16bc0dc36a1d345aa9e076816
[INFO] running `Command { std: "docker" "start" "-a" "f2d1bcfe00b01f8e8ce6214f3802cfa6c5bc67e16bc0dc36a1d345aa9e076816", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `Chain` and `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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rewrite` is never constructed
[INFO] [stdout]  --> src/middlewares/mod.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Rewrite {}
[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 `Check` is never constructed
[INFO] [stdout]   --> src/middlewares/mod.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Check {}
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cache` is never constructed
[INFO] [stdout]   --> src/middlewares/mod.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct Cache {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Request` is never constructed
[INFO] [stdout]  --> src/middleware/mod.rs:4:19
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) struct Request {
[INFO] [stdout]   |                   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Response` is never constructed
[INFO] [stdout]   --> src/middleware/mod.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub(crate) struct Response {
[INFO] [stdout]    |                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `NextFunction` is never used
[INFO] [stdout]   --> src/middleware/mod.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub type NextFunction = Box<dyn FnOnce(Request) -> Response>;
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Middleware` is never used
[INFO] [stdout]   --> src/middleware/mod.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub trait Middleware {
[INFO] [stdout]    |           ^^^^^^^^^^
[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] [stderr]    Compiling middleware v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "f2d1bcfe00b01f8e8ce6214f3802cfa6c5bc67e16bc0dc36a1d345aa9e076816", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2d1bcfe00b01f8e8ce6214f3802cfa6c5bc67e16bc0dc36a1d345aa9e076816", kill_on_drop: false }`
[INFO] [stdout] f2d1bcfe00b01f8e8ce6214f3802cfa6c5bc67e16bc0dc36a1d345aa9e076816
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6da0389a6b2621d09316e11d3a5fb7a3c69185417e94a567892af96771fffb84
[INFO] running `Command { std: "docker" "start" "-a" "6da0389a6b2621d09316e11d3a5fb7a3c69185417e94a567892af96771fffb84", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Chain` and `traverse`
[INFO] [stderr]   --> src/chain/mod.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |     use super::{traverse, Chain, Chainable};
[INFO] [stderr]    |                 ^^^^^^^^  ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Rewrite` is never constructed
[INFO] [stderr]  --> src/middlewares/mod.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub struct Rewrite {}
[INFO] [stderr]   |            ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Check` is never constructed
[INFO] [stderr]   --> src/middlewares/mod.rs:16:12
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct Check {}
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Cache` is never constructed
[INFO] [stderr]   --> src/middlewares/mod.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub struct Cache {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Request` is never constructed
[INFO] [stderr]  --> src/middleware/mod.rs:4:19
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub(crate) struct Request {
[INFO] [stderr]   |                   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Response` is never constructed
[INFO] [stderr]   --> src/middleware/mod.rs:10:19
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub(crate) struct Response {
[INFO] [stderr]    |                   ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `NextFunction` is never used
[INFO] [stderr]   --> src/middleware/mod.rs:15:10
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub type NextFunction = Box<dyn FnOnce(Request) -> Response>;
[INFO] [stderr]    |          ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Middleware` is never used
[INFO] [stderr]   --> src/middleware/mod.rs:17:11
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub trait Middleware {
[INFO] [stderr]    |           ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `traverse` is never used
[INFO] [stderr]   --> src/middleware/mod.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn traverse(req: Request, mut iter: IntoIter<Box<dyn Middleware>>) -> Response {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Chainable` is never used
[INFO] [stderr]  --> src/chain/mod.rs:1:18
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub(crate) trait Chainable<T> {
[INFO] [stderr]   |                  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `Chain` is never used
[INFO] [stderr]  --> src/chain/mod.rs:5:6
[INFO] [stderr]   |
[INFO] [stderr] 5 | type Chain<T> = Vec<Box<dyn Chainable<T>>>;
[INFO] [stderr]   |      ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `traverse` is never used
[INFO] [stderr]  --> src/chain/mod.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn traverse<T>(chain: Chain<T>, mut input: T) -> T {
[INFO] [stderr]   |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Add` is never constructed
[INFO] [stderr]   --> src/chain/mod.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 |     struct Add(i64);
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Sub` is never constructed
[INFO] [stderr]   --> src/chain/mod.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     struct Sub(i64);
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Request` is never constructed
[INFO] [stderr]   --> src/chain/mod.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |     struct Request(i64);
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `middleware` (lib) generated 15 warnings (run `cargo fix --lib -p middleware` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/middleware-c1664876cbbc4791)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test middleware::test::full_chain ... ok
[INFO] [stdout] test middleware::test::caching ... ok
[INFO] [stdout] test chain::test::example_chain ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.08s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests middleware
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6da0389a6b2621d09316e11d3a5fb7a3c69185417e94a567892af96771fffb84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6da0389a6b2621d09316e11d3a5fb7a3c69185417e94a567892af96771fffb84", kill_on_drop: false }`
[INFO] [stdout] 6da0389a6b2621d09316e11d3a5fb7a3c69185417e94a567892af96771fffb84