[INFO] cloning repository https://github.com/sabahtalateh/rust-async-book [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sabahtalateh/rust-async-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsabahtalateh%2Frust-async-book", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsabahtalateh%2Frust-async-book'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 1f1be3396332455f288719bd2f163fba11b7f47d [INFO] checking sabahtalateh/rust-async-book against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsabahtalateh%2Frust-async-book" "/workspace/builds/worker-10/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/sabahtalateh/rust-async-book on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/sabahtalateh/rust-async-book [INFO] finished tweaking git repo https://github.com/sabahtalateh/rust-async-book [INFO] tweaked toml for git repo https://github.com/sabahtalateh/rust-async-book written to /workspace/builds/worker-10/source/Cargo.toml [INFO] crate git repo https://github.com/sabahtalateh/rust-async-book already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] bb3fd7b78c51eb85c124ac1b3f7bc51f4f343e21d45d96bbf1de10796b60ed5d [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" "bb3fd7b78c51eb85c124ac1b3f7bc51f4f343e21d45d96bbf1de10796b60ed5d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "bb3fd7b78c51eb85c124ac1b3f7bc51f4f343e21d45d96bbf1de10796b60ed5d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bb3fd7b78c51eb85c124ac1b3f7bc51f4f343e21d45d96bbf1de10796b60ed5d", kill_on_drop: false }` [INFO] [stdout] bb3fd7b78c51eb85c124ac1b3f7bc51f4f343e21d45d96bbf1de10796b60ed5d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "RUSTUP_TOOLCHAIN=3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "-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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/tmp/crater-runner-fifo/jobserver-crater-fwd" "/opt/rustwide/cargo-home/bin/cargo" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5288fe395a7ecd4ed5f5680baddc7f47cacad0a604cdc1961a0dd874bb63865d [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" "5288fe395a7ecd4ed5f5680baddc7f47cacad0a604cdc1961a0dd874bb63865d", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.62 [INFO] [stderr] Checking futures v0.1.29 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling autocfg v0.1.6 [INFO] [stderr] Checking rand_core v0.4.2 [INFO] [stderr] Compiling byteorder v1.3.2 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Checking either v1.5.2 [INFO] [stderr] Checking fnv v1.0.6 [INFO] [stderr] Checking stable_deref_trait v1.1.1 [INFO] [stderr] Compiling arrayvec v0.4.11 [INFO] [stderr] Checking scopeguard v0.3.3 [INFO] [stderr] Checking smallvec v0.6.10 [INFO] [stderr] Checking nodrop v0.1.13 [INFO] [stderr] Checking scopeguard v1.0.0 [INFO] [stderr] Checking futures-core-preview v0.3.0-alpha.17 [INFO] [stderr] Compiling memchr v2.2.1 [INFO] [stderr] Checking itoa v0.4.4 [INFO] [stderr] Compiling httparse v1.3.4 [INFO] [stderr] Checking futures-io-preview v0.3.0-alpha.17 [INFO] [stderr] Checking pin-utils v0.1.0-alpha.4 [INFO] [stderr] Checking indexmap v1.1.0 [INFO] [stderr] Checking try-lock v0.2.2 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Checking rand_jitter v0.1.4 [INFO] [stderr] Checking crossbeam-utils v0.6.6 [INFO] [stderr] Checking tokio-sync v0.1.6 [INFO] [stderr] Checking owning_ref v0.4.0 [INFO] [stderr] Checking futures-sink-preview v0.3.0-alpha.17 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Checking rand_xorshift v0.1.1 [INFO] [stderr] Checking rand_isaac v0.1.1 [INFO] [stderr] Checking rand_hc v0.1.0 [INFO] [stderr] Checking tokio-executor v0.1.8 [INFO] [stderr] Checking crossbeam-queue v0.1.2 [INFO] [stderr] Checking lock_api v0.1.5 [INFO] [stderr] Checking futures-channel-preview v0.3.0-alpha.17 [INFO] [stderr] Compiling parking_lot_core v0.4.0 [INFO] [stderr] Compiling memoffset v0.5.1 [INFO] [stderr] Compiling hyper v0.12.34 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking num_cpus v1.10.1 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking time v0.1.42 [INFO] [stderr] Checking want v0.2.0 [INFO] [stderr] Checking tokio-timer v0.2.11 [INFO] [stderr] Checking tokio-current-thread v0.1.6 [INFO] [stderr] Checking futures-util-preview v0.3.0-alpha.17 [INFO] [stderr] Checking bytes v0.4.12 [INFO] [stderr] Checking futures-cpupool v0.1.8 [INFO] [stderr] Checking mio v0.6.19 [INFO] [stderr] Checking tokio-io v0.1.12 [INFO] [stderr] Checking http v0.1.18 [INFO] [stderr] Checking string v0.2.1 [INFO] [stderr] Checking tokio-buf v0.1.1 [INFO] [stderr] Checking futures-executor-preview v0.3.0-alpha.17 [INFO] [stderr] Checking crossbeam-epoch v0.7.2 [INFO] [stderr] Checking parking_lot v0.7.1 [INFO] [stderr] Checking futures-preview v0.3.0-alpha.17 [INFO] [stderr] Checking crossbeam-deque v0.7.1 [INFO] [stderr] Checking tokio-reactor v0.1.9 [INFO] [stderr] Checking tokio-threadpool v0.1.15 [INFO] [stderr] Checking tokio-tcp v0.1.3 [INFO] [stderr] Checking http-body v0.1.0 [INFO] [stderr] Checking h2 v0.1.26 [INFO] [stderr] Checking tokio v0.1.22 [INFO] [stderr] Checking async-await-echo v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/pin.rs:54:9 [INFO] [stdout] | [INFO] [stdout] 54 | let a = "1".as_bytes().to_vec(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/bin/pin.rs:54:9 [INFO] [stdout] | [INFO] [stdout] 54 | let a = "1".as_bytes().to_vec(); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/event_loop.rs:52:20 [INFO] [stdout] | [INFO] [stdout] 52 | Ok(mut t) => { [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: unused `Result` that must be used [INFO] [stdout] --> src/bin/event_loop.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | self.tasks_sender.send(task); [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: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/bin/event_loop.rs:52:20 [INFO] [stdout] | [INFO] [stdout] 52 | Ok(mut t) => { [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: unused `Result` that must be used [INFO] [stdout] --> src/bin/event_loop.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | self.tasks_sender.send(task); [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: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::process::Output` [INFO] [stdout] --> src/bin/executor.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::process::Output; [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: unused import: `std::process::Output` [INFO] [stdout] --> src/bin/executor.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::process::Output; [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] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 44.63s [INFO] running `Command { std: "docker" "inspect" "5288fe395a7ecd4ed5f5680baddc7f47cacad0a604cdc1961a0dd874bb63865d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5288fe395a7ecd4ed5f5680baddc7f47cacad0a604cdc1961a0dd874bb63865d", kill_on_drop: false }` [INFO] [stdout] 5288fe395a7ecd4ed5f5680baddc7f47cacad0a604cdc1961a0dd874bb63865d