[INFO] cloning repository https://github.com/gaolle/rust-web
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gaolle/rust-web" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgaolle%2Frust-web", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgaolle%2Frust-web'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38f3b410b411b84a8c5a2bbeb1d0e66fcac1ff9e
[INFO] checking gaolle/rust-web against master#f5f33ec0e0455eefa72fc5567eb1280a4d5ee206 for pr-83312
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgaolle%2Frust-web" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gaolle/rust-web on toolchain f5f33ec0e0455eefa72fc5567eb1280a4d5ee206
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gaolle/rust-web
[INFO] finished tweaking git repo https://github.com/gaolle/rust-web
[INFO] tweaked toml for git repo https://github.com/gaolle/rust-web written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/gaolle/rust-web already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 51c99c0c651014993766e6ce8a67c57081a8dfe9d2277227d28edbfcbf0219fc
[INFO] running `Command { std: "docker" "start" "-a" "51c99c0c651014993766e6ce8a67c57081a8dfe9d2277227d28edbfcbf0219fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51c99c0c651014993766e6ce8a67c57081a8dfe9d2277227d28edbfcbf0219fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51c99c0c651014993766e6ce8a67c57081a8dfe9d2277227d28edbfcbf0219fc", kill_on_drop: false }`
[INFO] [stdout] 51c99c0c651014993766e6ce8a67c57081a8dfe9d2277227d28edbfcbf0219fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+f5f33ec0e0455eefa72fc5567eb1280a4d5ee206" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5cbdf6bcc0f3ff046df7bb27ea11c2f268a8db68bcc214763fe2c1c8c9b25144
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5cbdf6bcc0f3ff046df7bb27ea11c2f268a8db68bcc214763fe2c1c8c9b25144", kill_on_drop: false }`
[INFO] [stderr]     Checking thread-lib v0.1.0 (/opt/rustwide/workdir/thread-lib)
[INFO] [stdout] warning: unused import: `std::process::id`
[INFO] [stdout]  --> thread-lib/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::process::id;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> thread-lib/src/lib.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 13 | /             loop {
[INFO] [stdout] 14 | |                 let message = receiver.lock().unwrap().recv().unwrap();
[INFO] [stdout] 15 | |                 match message {
[INFO] [stdout] 16 | |                     Message::NewJob(job) => {
[INFO] [stdout] ...  |
[INFO] [stdout] 23 | |                 }
[INFO] [stdout] 24 | |             }
[INFO] [stdout]    | |_____________- any code following this expression is unreachable
[INFO] [stdout] 25 |               receiver;
[INFO] [stdout]    |               ^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `id`
[INFO] [stdout]  --> thread-lib/src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     id: usize,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement drops value
[INFO] [stdout]   --> thread-lib/src/lib.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |             receiver;
[INFO] [stdout]    |             ^^^^^^^^^ help: use `drop` to clarify the intent: `drop(receiver);`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rust-web v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread;
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "5cbdf6bcc0f3ff046df7bb27ea11c2f268a8db68bcc214763fe2c1c8c9b25144", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cbdf6bcc0f3ff046df7bb27ea11c2f268a8db68bcc214763fe2c1c8c9b25144", kill_on_drop: false }`
[INFO] [stdout] 5cbdf6bcc0f3ff046df7bb27ea11c2f268a8db68bcc214763fe2c1c8c9b25144