[INFO] fetching crate async-io 0.1.6...
[INFO] checking async-io-0.1.6 against master#7b3a7819371cef92a187e9bac8f7810ccde15216 for pr-74846
[INFO] extracting crate async-io 0.1.6 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate async-io 0.1.6 on toolchain 7b3a7819371cef92a187e9bac8f7810ccde15216
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async-io 0.1.6
[INFO] finished tweaking crates.io crate async-io 0.1.6
[INFO] tweaked toml for crates.io crate async-io 0.1.6 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate async-io 0.1.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "metadata" "--no-deps" "--format-version=1", 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] 29a60d5060659552326d8866fa950f1be1aee3cd73ba2b9617a2f348da4ad207
[INFO] running `Command { std: "docker" "start" "-a" "29a60d5060659552326d8866fa950f1be1aee3cd73ba2b9617a2f348da4ad207", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "29a60d5060659552326d8866fa950f1be1aee3cd73ba2b9617a2f348da4ad207", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29a60d5060659552326d8866fa950f1be1aee3cd73ba2b9617a2f348da4ad207", kill_on_drop: false }`
[INFO] [stdout] 29a60d5060659552326d8866fa950f1be1aee3cd73ba2b9617a2f348da4ad207
[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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+7b3a7819371cef92a187e9bac8f7810ccde15216" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f9f9720ac0f747094c2919f1815764f9339407874367a999759cf5fd89b183a4
[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" "f9f9720ac0f747094c2919f1815764f9339407874367a999759cf5fd89b183a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking parking v1.0.5
[INFO] [stderr]     Checking fastrand v1.3.3
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking vec-arena v0.5.0
[INFO] [stderr]     Checking simple-mutex v1.1.5
[INFO] [stderr]     Checking async-channel v1.1.1
[INFO] [stderr]     Checking async-dup v1.2.1
[INFO] [stderr]     Checking futures-lite v0.1.9
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking async-io v0.1.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.86s
[INFO] running `Command { std: "docker" "inspect" "f9f9720ac0f747094c2919f1815764f9339407874367a999759cf5fd89b183a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9f9720ac0f747094c2919f1815764f9339407874367a999759cf5fd89b183a4", kill_on_drop: false }`
[INFO] [stdout] f9f9720ac0f747094c2919f1815764f9339407874367a999759cf5fd89b183a4