[INFO] cloning repository https://github.com/vlad-onis/tower_practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vlad-onis/tower_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlad-onis%2Ftower_practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlad-onis%2Ftower_practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9cfcd5971c540b621e053b98e0be56a6967d6a99
[INFO] checking vlad-onis/tower_practice against try#a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399 for pr-145770
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvlad-onis%2Ftower_practice" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vlad-onis/tower_practice
[INFO] finished tweaking git repo https://github.com/vlad-onis/tower_practice
[INFO] tweaked toml for git repo https://github.com/vlad-onis/tower_practice written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vlad-onis/tower_practice on toolchain a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vlad-onis/tower_practice 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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dbdcd4d4f5cf30f3a8bd42e7203b1d8f8bb59b2153bd4fe955e46514f90a8092
[INFO] running `Command { std: "docker" "start" "-a" "dbdcd4d4f5cf30f3a8bd42e7203b1d8f8bb59b2153bd4fe955e46514f90a8092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbdcd4d4f5cf30f3a8bd42e7203b1d8f8bb59b2153bd4fe955e46514f90a8092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbdcd4d4f5cf30f3a8bd42e7203b1d8f8bb59b2153bd4fe955e46514f90a8092", kill_on_drop: false }`
[INFO] [stdout] dbdcd4d4f5cf30f3a8bd42e7203b1d8f8bb59b2153bd4fe955e46514f90a8092
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddd873db40d3ef7f6080222418cbfac787b511f8873ce468ab428b7611a7ad4e
[INFO] running `Command { std: "docker" "start" "-a" "ddd873db40d3ef7f6080222418cbfac787b511f8873ce468ab428b7611a7ad4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.3.0
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking pin-project-lite v0.2.14
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking log v0.4.22
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking tower-service v0.3.2
[INFO] [stderr]     Checking tower-layer v0.3.2
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.70
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking socket2 v0.5.7
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking hdrhistogram v7.5.4
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling tokio-macros v2.3.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]     Checking tokio v1.38.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking pin-project v1.1.3
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking tokio-util v0.7.10
[INFO] [stderr]     Checking tower v0.4.13
[INFO] [stderr]     Checking tower_practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `fmt::Display`
[INFO] [stdout]  --> src/alternating_service.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fmt::Display,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fmt::Display`
[INFO] [stdout]  --> src/alternating_service.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fmt::Display,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::task`
[INFO] [stdout]   --> src/alternating_service.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     use std::task;
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `req`
[INFO] [stdout]   --> src/alternating_service.rs:39:24
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn call(&mut self, req: AlternatingRequest) -> Self::Future {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_req`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `req`
[INFO] [stdout]   --> src/alternating_service.rs:39:24
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn call(&mut self, req: AlternatingRequest) -> Self::Future {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_req`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AlternatingRequest` is never constructed
[INFO] [stdout]   --> src/alternating_service.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct AlternatingRequest;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AlternatingResponse` is never constructed
[INFO] [stdout]   --> src/alternating_service.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct AlternatingResponse;
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AlternatingService` is never constructed
[INFO] [stdout]   --> src/alternating_service.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct AlternatingService {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EchoRequest` is never constructed
[INFO] [stdout]   --> src/echo_service.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct EchoRequest(String);
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EchoResponse` is never constructed
[INFO] [stdout]   --> src/echo_service.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct EchoResponse(String);
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EchoService` is never constructed
[INFO] [stdout]   --> src/echo_service.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub struct EchoService;
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/echo_service.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 |         let mut service = EchoService;
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.78s
[INFO] running `Command { std: "docker" "inspect" "ddd873db40d3ef7f6080222418cbfac787b511f8873ce468ab428b7611a7ad4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddd873db40d3ef7f6080222418cbfac787b511f8873ce468ab428b7611a7ad4e", kill_on_drop: false }`
[INFO] [stdout] ddd873db40d3ef7f6080222418cbfac787b511f8873ce468ab428b7611a7ad4e
