[INFO] cloning repository https://github.com/yuu/rust-future-example [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yuu/rust-future-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuu%2Frust-future-example", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuu%2Frust-future-example'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] c5704fd681f1180c6d45ceaf720eccd7d1e0247b [INFO] checking yuu/rust-future-example against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuu%2Frust-future-example" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/yuu/rust-future-example on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/yuu/rust-future-example [INFO] finished tweaking git repo https://github.com/yuu/rust-future-example [INFO] tweaked toml for git repo https://github.com/yuu/rust-future-example written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate git repo https://github.com/yuu/rust-future-example already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating git repository `https://github.com/stjepang/crossbeam` [INFO] [stderr] Updating git repository `https://github.com/tokio-rs/async` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded tracing-core v0.1.2 [INFO] [stderr] Downloaded parking_lot_core v0.6.1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 285825b98a618f16a2bb484278ae92198e3017f96514862626b3951d079c3b17 [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" "285825b98a618f16a2bb484278ae92198e3017f96514862626b3951d079c3b17", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "285825b98a618f16a2bb484278ae92198e3017f96514862626b3951d079c3b17", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "285825b98a618f16a2bb484278ae92198e3017f96514862626b3951d079c3b17", kill_on_drop: false }` [INFO] [stdout] 285825b98a618f16a2bb484278ae92198e3017f96514862626b3951d079c3b17 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 387c9cd39f9b86020ded49e9cfe560fdec7a57468c47bed2e560d644c69d1a8a [INFO] running `Command { std: "docker" "start" "-a" "387c9cd39f9b86020ded49e9cfe560fdec7a57468c47bed2e560d644c69d1a8a", kill_on_drop: false }` [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling libc v0.2.60 [INFO] [stderr] Checking lazy_static v1.3.0 [INFO] [stderr] Checking futures-core-preview v0.3.0-alpha.17 [INFO] [stderr] Checking smallvec v0.6.10 [INFO] [stderr] Checking async-util v0.1.0 (https://github.com/tokio-rs/async#e1b3ba3d) [INFO] [stderr] Checking fnv v1.0.6 [INFO] [stderr] Compiling arrayvec v0.4.11 [INFO] [stderr] Checking nodrop v0.1.13 [INFO] [stderr] Checking scopeguard v0.3.3 [INFO] [stderr] Checking memoffset v0.2.1 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling syn v0.15.40 [INFO] [stderr] Checking arc-waker v0.1.0 (https://github.com/tokio-rs/async#e1b3ba3d) [INFO] [stderr] Checking lock_api v0.3.1 [INFO] [stderr] Checking log v0.4.7 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Checking byteorder v1.3.2 [INFO] [stderr] Checking memchr v2.2.1 [INFO] [stderr] Checking crossbeam-utils v0.6.5 [INFO] [stderr] Checking crossbeam-utils v0.6.5 (https://github.com/stjepang/crossbeam?branch=raw-parker#e2a7760f) [INFO] [stderr] Checking tracing-core v0.1.2 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Checking futures-sink-preview v0.3.0-alpha.17 [INFO] [stderr] Checking tokio-sync v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Compiling parking_lot_core v0.6.1 [INFO] [stderr] Compiling parking_lot v0.9.0 [INFO] [stderr] Checking crossbeam-queue v0.1.2 [INFO] [stderr] Checking crossbeam-channel v0.3.8 [INFO] [stderr] Checking tokio-executor v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking tokio-timer v0.3.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Checking crossbeam-epoch v0.7.1 [INFO] [stderr] Checking tokio-current-thread v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking num_cpus v1.10.1 [INFO] [stderr] Checking bytes v0.4.12 [INFO] [stderr] Checking crossbeam-deque v0.7.1 [INFO] [stderr] Checking mio v0.6.19 [INFO] [stderr] Checking tokio-threadpool v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking tokio-io v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking tokio-codec v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking tokio-fs v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking tokio-reactor v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking mio-uds v0.6.7 [INFO] [stderr] Checking tokio-tcp v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking tokio-udp v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking tokio-uds v0.3.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Compiling tokio-macros v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking tokio v0.2.0 (https://github.com/tokio-rs/tokio#e88d10a3) [INFO] [stderr] Checking future-example v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `AsyncWriteExt` [INFO] [stdout] --> src/main.rs:4:31 [INFO] [stdout] | [INFO] [stdout] 4 | use tokio::io::{AsyncReadExt, AsyncWriteExt}; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `AsyncWriteExt` [INFO] [stdout] --> src/main.rs:4:31 [INFO] [stdout] | [INFO] [stdout] 4 | use tokio::io::{AsyncReadExt, AsyncWriteExt}; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `async_await` has been stable since 1.39.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/main.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(async_await)] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(stable_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | stream.read_exact(&mut buf).await; [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: the feature `async_await` has been stable since 1.39.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/main.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(async_await)] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(stable_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:9:5 [INFO] [stdout] | [INFO] [stdout] 9 | stream.read_exact(&mut buf).await; [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: 3 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 33.83s [INFO] running `Command { std: "docker" "inspect" "387c9cd39f9b86020ded49e9cfe560fdec7a57468c47bed2e560d644c69d1a8a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "387c9cd39f9b86020ded49e9cfe560fdec7a57468c47bed2e560d644c69d1a8a", kill_on_drop: false }` [INFO] [stdout] 387c9cd39f9b86020ded49e9cfe560fdec7a57468c47bed2e560d644c69d1a8a