[INFO] fetching crate driver_async 0.0.3...
[INFO] checking driver_async-0.0.3 against 1.55.0 for beta-1.56-3
[INFO] extracting crate driver_async 0.0.3 into /workspace/builds/worker-73/source
[INFO] validating manifest of crates.io crate driver_async 0.0.3 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate driver_async 0.0.3
[INFO] finished tweaking crates.io crate driver_async 0.0.3
[INFO] tweaked toml for crates.io crate driver_async 0.0.3 written to /workspace/builds/worker-73/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 60974f7403bbd5c8610588890dfab381c489f791c14358c60f466693103f836b
[INFO] running `Command { std: "docker" "start" "-a" "60974f7403bbd5c8610588890dfab381c489f791c14358c60f466693103f836b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60974f7403bbd5c8610588890dfab381c489f791c14358c60f466693103f836b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60974f7403bbd5c8610588890dfab381c489f791c14358c60f466693103f836b", kill_on_drop: false }`
[INFO] [stdout] 60974f7403bbd5c8610588890dfab381c489f791c14358c60f466693103f836b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1264089d8fb9a21b21f17ad3ed803b59a723b41159f2a99f40885f614991f40
[INFO] running `Command { std: "docker" "start" "-a" "c1264089d8fb9a21b21f17ad3ed803b59a723b41159f2a99f40885f614991f40", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking futures-sink v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling tokio v0.3.7
[INFO] [stderr]     Checking driver_async v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.20s
[INFO] running `Command { std: "docker" "inspect" "c1264089d8fb9a21b21f17ad3ed803b59a723b41159f2a99f40885f614991f40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1264089d8fb9a21b21f17ad3ed803b59a723b41159f2a99f40885f614991f40", kill_on_drop: false }`
[INFO] [stdout] c1264089d8fb9a21b21f17ad3ed803b59a723b41159f2a99f40885f614991f40
