[INFO] fetching crate jobserver 0.1.21...
[INFO] checking jobserver-0.1.21 against try#353a0a223066e9f46a1d935f2271a26c3c5002bb for pr-75180
[INFO] extracting crate jobserver 0.1.21 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate jobserver 0.1.21 on toolchain 353a0a223066e9f46a1d935f2271a26c3c5002bb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jobserver 0.1.21
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate jobserver 0.1.21
[INFO] tweaked toml for crates.io crate jobserver 0.1.21 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ba9aaaf1f75baea356ff617672c511afb98d7bdaba92e8f57ab9c15ea683d08
[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" "8ba9aaaf1f75baea356ff617672c511afb98d7bdaba92e8f57ab9c15ea683d08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ba9aaaf1f75baea356ff617672c511afb98d7bdaba92e8f57ab9c15ea683d08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ba9aaaf1f75baea356ff617672c511afb98d7bdaba92e8f57ab9c15ea683d08", kill_on_drop: false }`
[INFO] [stdout] 8ba9aaaf1f75baea356ff617672c511afb98d7bdaba92e8f57ab9c15ea683d08
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "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] a59d431eb86545e2e9932af9f4a57bcc1ef867c45da86e5a63d2c02523d84aa5
[INFO] running `Command { std: "docker" "start" "-a" "a59d431eb86545e2e9932af9f4a57bcc1ef867c45da86e5a63d2c02523d84aa5", kill_on_drop: false }`
[INFO] [stderr]     Checking arc-swap v0.4.7
[INFO] [stderr]     Checking scoped-tls v0.1.2
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking jobserver v0.1.21 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking tokio-executor v0.1.10
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking tokio-current-thread v0.1.7
[INFO] [stderr]     Checking tokio-timer v0.2.13
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-signal v0.2.9
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking tokio-process v0.2.5
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stdout] warning: use of deprecated function `futures::stream::iter`: implementation moved to `iter_ok` and `iter_result`
[INFO] [stdout]    --> tests/client.rs:164:18
[INFO] [stdout]     |
[INFO] [stdout] 164 |     let stream = stream::iter(futures.into_iter().map(Ok)).buffer_unordered(num_cpus::get());
[INFO] [stdout]     |                  ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` 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 9.35s
[INFO] running `Command { std: "docker" "inspect" "a59d431eb86545e2e9932af9f4a57bcc1ef867c45da86e5a63d2c02523d84aa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a59d431eb86545e2e9932af9f4a57bcc1ef867c45da86e5a63d2c02523d84aa5", kill_on_drop: false }`
[INFO] [stdout] a59d431eb86545e2e9932af9f4a57bcc1ef867c45da86e5a63d2c02523d84aa5