[INFO] cloning repository https://github.com/jakobdalsgaard/rust-examples [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jakobdalsgaard/rust-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakobdalsgaard%2Frust-examples", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakobdalsgaard%2Frust-examples'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 8fc63475160148cdaf75c5f4ed0df6d679186a5f [INFO] checking jakobdalsgaard/rust-examples against try#575650af7d7ca88602df28e39d27bf3e456c306e for pr-80579 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjakobdalsgaard%2Frust-examples" "/workspace/builds/worker-12/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jakobdalsgaard/rust-examples on toolchain 575650af7d7ca88602df28e39d27bf3e456c306e [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/jakobdalsgaard/rust-examples [INFO] finished tweaking git repo https://github.com/jakobdalsgaard/rust-examples [INFO] tweaked toml for git repo https://github.com/jakobdalsgaard/rust-examples written to /workspace/builds/worker-12/source/Cargo.toml [INFO] crate git repo https://github.com/jakobdalsgaard/rust-examples already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 25646c0ff7c644537ba124776e1d5290e691d07f7ac804930bfbf414a90da3d4 [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" "25646c0ff7c644537ba124776e1d5290e691d07f7ac804930bfbf414a90da3d4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "25646c0ff7c644537ba124776e1d5290e691d07f7ac804930bfbf414a90da3d4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "25646c0ff7c644537ba124776e1d5290e691d07f7ac804930bfbf414a90da3d4", kill_on_drop: false }` [INFO] [stdout] 25646c0ff7c644537ba124776e1d5290e691d07f7ac804930bfbf414a90da3d4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 00793ac75371da5b82a2cd474b9517df0923d417d99b31d2895da2405e8f1f34 [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" "00793ac75371da5b82a2cd474b9517df0923d417d99b31d2895da2405e8f1f34", kill_on_drop: false }` [INFO] [stderr] Checking log v0.3.6 [INFO] [stderr] Checking futures v0.1.10 [INFO] [stderr] Checking rust-examples v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `futures::sync::mpsc::Sender` [INFO] [stdout] --> examples/futurechannels.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | use futures::sync::mpsc::Sender; [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] --> examples/inc.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | 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::sync::mpsc::channel` [INFO] [stdout] --> examples/inc.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::sync::mpsc::channel; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> examples/stdchannels.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | let (mut tx, mut rx) = sync_channel(0); [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] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> examples/stdchannels.rs:8:16 [INFO] [stdout] | [INFO] [stdout] 8 | let (mut tx, mut rx) = sync_channel(0); [INFO] [stdout] | ----^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `child2` [INFO] [stdout] --> examples/futurechannels.rs:28:7 [INFO] [stdout] | [INFO] [stdout] 28 | let child2 = thread::spawn(move || { [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_child2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `rest` [INFO] [stdout] --> examples/futurechannels.rs:66:14 [INFO] [stdout] | [INFO] [stdout] 66 | let (item, rest) = rest.into_future().wait().ok().unwrap(); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_rest` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> examples/futurechannels.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 14 | / receiver.map(|i| { [INFO] [stdout] 15 | | println!("got: {}", i); [INFO] [stdout] 16 | | }).wait(); [INFO] [stdout] | |______________^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> examples/futurechannels.rs:30:5 [INFO] [stdout] | [INFO] [stdout] 30 | sender2.send(1).and_then(|tx| { println!("sending 2"); tx.send(2) } ).wait(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> examples/futurechannels.rs:49:3 [INFO] [stdout] | [INFO] [stdout] 49 | sender3.send(5).and_then(|tx| tx.send(6)).wait(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> examples/stdchannels.rs:17:7 [INFO] [stdout] | [INFO] [stdout] 17 | tx.send(7); [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 3.20s [INFO] running `Command { std: "docker" "inspect" "00793ac75371da5b82a2cd474b9517df0923d417d99b31d2895da2405e8f1f34", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "00793ac75371da5b82a2cd474b9517df0923d417d99b31d2895da2405e8f1f34", kill_on_drop: false }` [INFO] [stdout] 00793ac75371da5b82a2cd474b9517df0923d417d99b31d2895da2405e8f1f34