[INFO] cloning repository https://github.com/IloveNooodles/simple-multithreaded-rust-webserver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/IloveNooodles/simple-multithreaded-rust-webserver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIloveNooodles%2Fsimple-multithreaded-rust-webserver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIloveNooodles%2Fsimple-multithreaded-rust-webserver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a7c40cdfee74dbadc6cb904b3940768e28c2a7b5
[INFO] checking IloveNooodles/simple-multithreaded-rust-webserver/a7c40cdfee74dbadc6cb904b3940768e28c2a7b5 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIloveNooodles%2Fsimple-multithreaded-rust-webserver" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/IloveNooodles/simple-multithreaded-rust-webserver on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/IloveNooodles/simple-multithreaded-rust-webserver
[INFO] finished tweaking git repo https://github.com/IloveNooodles/simple-multithreaded-rust-webserver
[INFO] tweaked toml for git repo https://github.com/IloveNooodles/simple-multithreaded-rust-webserver written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/IloveNooodles/simple-multithreaded-rust-webserver 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a1f2add3afc94c425b007fa90a42a6a1439d2ca1502151299c93aca92573192
[INFO] running `Command { std: "docker" "start" "-a" "2a1f2add3afc94c425b007fa90a42a6a1439d2ca1502151299c93aca92573192", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a1f2add3afc94c425b007fa90a42a6a1439d2ca1502151299c93aca92573192", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a1f2add3afc94c425b007fa90a42a6a1439d2ca1502151299c93aca92573192", kill_on_drop: false }`
[INFO] [stdout] 2a1f2add3afc94c425b007fa90a42a6a1439d2ca1502151299c93aca92573192
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7755ea8f4e804fadd1109d317aa41150d06f51ca214c4463be849f8870eba358
[INFO] running `Command { std: "docker" "start" "-a" "7755ea8f4e804fadd1109d317aa41150d06f51ca214c4463be849f8870eba358", kill_on_drop: false }`
[INFO] [stderr]     Checking simple-rust-webserver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/lib.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::mpsc::{self, Receiver};
[INFO] [stdout]   |                             ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Receiver`
[INFO] [stdout]  --> src/lib.rs:1:29
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::sync::mpsc::{self, Receiver};
[INFO] [stdout]   |                             ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/lib.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct Worker {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 68 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |             self.sender.send(Message::Terminate);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |             let _ = self.sender.send(Message::Terminate);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/lib.rs:68:5
[INFO] [stdout]    |
[INFO] [stdout] 67 | struct Worker {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] 68 |     id: usize,
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |             self.sender.send(Message::Terminate);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |             let _ = self.sender.send(Message::Terminate);
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "7755ea8f4e804fadd1109d317aa41150d06f51ca214c4463be849f8870eba358", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7755ea8f4e804fadd1109d317aa41150d06f51ca214c4463be849f8870eba358", kill_on_drop: false }`
[INFO] [stdout] 7755ea8f4e804fadd1109d317aa41150d06f51ca214c4463be849f8870eba358