[INFO] fetching crate maybe-async 0.2.6...
[INFO] checking maybe-async-0.2.6 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate maybe-async 0.2.6 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate maybe-async 0.2.6 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate maybe-async 0.2.6
[INFO] finished tweaking crates.io crate maybe-async 0.2.6
[INFO] tweaked toml for crates.io crate maybe-async 0.2.6 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate maybe-async 0.2.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cd577745f32bc263ac50bd21e92d29ab0002695b0ad9a43b5aa7927f5e13ab7
[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" "6cd577745f32bc263ac50bd21e92d29ab0002695b0ad9a43b5aa7927f5e13ab7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cd577745f32bc263ac50bd21e92d29ab0002695b0ad9a43b5aa7927f5e13ab7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cd577745f32bc263ac50bd21e92d29ab0002695b0ad9a43b5aa7927f5e13ab7", kill_on_drop: false }`
[INFO] [stdout] 6cd577745f32bc263ac50bd21e92d29ab0002695b0ad9a43b5aa7927f5e13ab7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "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] 0c3f594780c7724e6d4949401bb645c74fb6cafd04b8c2e1514420cc633a85fc
[INFO] running `Command { std: "docker" "start" "-a" "0c3f594780c7724e6d4949401bb645c74fb6cafd04b8c2e1514420cc633a85fc", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling trybuild v1.0.42
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]     Checking dissimilar v1.0.2
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]     Checking proc-macro2 v1.0.27
[INFO] [stderr]    Compiling crossbeam-utils v0.8.4
[INFO] [stderr]    Compiling tokio v1.6.0
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.7
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking maybe-async v0.2.6 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking polling v2.0.3
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.4.1
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.34s
[INFO] running `Command { std: "docker" "inspect" "0c3f594780c7724e6d4949401bb645c74fb6cafd04b8c2e1514420cc633a85fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c3f594780c7724e6d4949401bb645c74fb6cafd04b8c2e1514420cc633a85fc", kill_on_drop: false }`
[INFO] [stdout] 0c3f594780c7724e6d4949401bb645c74fb6cafd04b8c2e1514420cc633a85fc