[INFO] updating cached repository https://github.com/hurou927/rust-async-futures-sample
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7daf40950145321adff6c80f19f27ff094177798
[INFO] checking hurou927/rust-async-futures-sample against try#7cb06892a23b4da510686618c8730f0b2e8bd952 for pr-66963
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhurou927%2Frust-async-futures-sample" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hurou927/rust-async-futures-sample on toolchain 7cb06892a23b4da510686618c8730f0b2e8bd952
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/hurou927/rust-async-futures-sample
[INFO] finished tweaking git repo https://github.com/hurou927/rust-async-futures-sample
[INFO] tweaked toml for git repo https://github.com/hurou927/rust-async-futures-sample written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/hurou927/rust-async-futures-sample already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+7cb06892a23b4da510686618c8730f0b2e8bd952" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] de34350c6f9cdafdab1f8d82e0359bb174ac79e1aa7edf980d06e2f7a0d9946e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "de34350c6f9cdafdab1f8d82e0359bb174ac79e1aa7edf980d06e2f7a0d9946e"`
[INFO] [stderr]     Checking regex-syntax v0.6.12
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]     Checking backtrace-sys v0.1.32
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking openssl v0.10.25
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking serde v1.0.102
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking tokio-reactor v0.1.10
[INFO] [stderr]     Checking tokio-threadpool v0.1.16
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking hyper v0.12.35
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking native-tls v0.2.3
[INFO] [stderr]     Checking publicsuffix v1.5.4
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.22
[INFO] [stderr]     Checking async-await v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `LocalSpawner`, `pending`, `ready`
[INFO] [stderr]  --> src/main.rs:6:49
[INFO] [stderr]   |
[INFO] [stderr] 6 |     executor::{block_on, ThreadPool, LocalPool, LocalSpawner},
[INFO] [stderr]   |                                                 ^^^^^^^^^^^^
[INFO] [stderr] 7 |     future,
[INFO] [stderr] 8 |     future::{ready, pending},
[INFO] [stderr]   |              ^^^^^  ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `LocalSpawner`, `pending`, `ready`
[INFO] [stderr]  --> src/main.rs:6:49
[INFO] [stderr]   |
[INFO] [stderr] 6 |     executor::{block_on, ThreadPool, LocalPool, LocalSpawner},
[INFO] [stderr]   |                                                 ^^^^^^^^^^^^
[INFO] [stderr] 7 |     future,
[INFO] [stderr] 8 |     future::{ready, pending},
[INFO] [stderr]   |              ^^^^^  ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.63s
[INFO] running `"docker" "inspect" "de34350c6f9cdafdab1f8d82e0359bb174ac79e1aa7edf980d06e2f7a0d9946e"`
[INFO] running `"docker" "rm" "-f" "de34350c6f9cdafdab1f8d82e0359bb174ac79e1aa7edf980d06e2f7a0d9946e"`
[INFO] [stdout] de34350c6f9cdafdab1f8d82e0359bb174ac79e1aa7edf980d06e2f7a0d9946e