[INFO] fetching crate buffered-reader 0.20.0...
[INFO] checking buffered-reader-0.20.0 against beta for pr-78714
[INFO] extracting crate buffered-reader 0.20.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate buffered-reader 0.20.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buffered-reader 0.20.0
[INFO] finished tweaking crates.io crate buffered-reader 0.20.0
[INFO] tweaked toml for crates.io crate buffered-reader 0.20.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48c7e91e9092c389fdaec63e7d4689fc0696619b0a4ab9289cbd5df32a72d26e
[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" "48c7e91e9092c389fdaec63e7d4689fc0696619b0a4ab9289cbd5df32a72d26e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48c7e91e9092c389fdaec63e7d4689fc0696619b0a4ab9289cbd5df32a72d26e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48c7e91e9092c389fdaec63e7d4689fc0696619b0a4ab9289cbd5df32a72d26e", kill_on_drop: false }`
[INFO] [stdout] 48c7e91e9092c389fdaec63e7d4689fc0696619b0a4ab9289cbd5df32a72d26e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 039f9465ba9d60ccf427be2f2aca79396b88f96d877ee7d33e2546cb10d59eee
[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" "039f9465ba9d60ccf427be2f2aca79396b88f96d877ee7d33e2546cb10d59eee", kill_on_drop: false }`
[INFO] [stderr]    Compiling bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]     Checking flate2 v1.0.19
[INFO] [stderr]     Checking bzip2 v0.4.1
[INFO] [stderr]     Checking buffered-reader v0.20.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.63s
[INFO] running `Command { std: "docker" "inspect" "039f9465ba9d60ccf427be2f2aca79396b88f96d877ee7d33e2546cb10d59eee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "039f9465ba9d60ccf427be2f2aca79396b88f96d877ee7d33e2546cb10d59eee", kill_on_drop: false }`
[INFO] [stdout] 039f9465ba9d60ccf427be2f2aca79396b88f96d877ee7d33e2546cb10d59eee