[INFO] fetching crate quicksilver-utils-async 0.3.0...
[INFO] checking quicksilver-utils-async-0.3.0 against beta for pr-78714
[INFO] extracting crate quicksilver-utils-async 0.3.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate quicksilver-utils-async 0.3.0 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 quicksilver-utils-async 0.3.0
[INFO] finished tweaking crates.io crate quicksilver-utils-async 0.3.0
[INFO] tweaked toml for crates.io crate quicksilver-utils-async 0.3.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate quicksilver-utils-async 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] ab658a39c269cfb75332d672a85e2de4e038436b9592d1f89fb2d1ce93808085
[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" "ab658a39c269cfb75332d672a85e2de4e038436b9592d1f89fb2d1ce93808085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab658a39c269cfb75332d672a85e2de4e038436b9592d1f89fb2d1ce93808085", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab658a39c269cfb75332d672a85e2de4e038436b9592d1f89fb2d1ce93808085", kill_on_drop: false }`
[INFO] [stdout] ab658a39c269cfb75332d672a85e2de4e038436b9592d1f89fb2d1ce93808085
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4e788d9bb6b4e33ba501e60deba777526eb12c61d1f14aad158f4ef3d4964437
[INFO] running `Command { std: "docker" "start" "-a" "4e788d9bb6b4e33ba501e60deba777526eb12c61d1f14aad158f4ef3d4964437", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-core v0.3.3
[INFO] [stderr]     Checking futures-io v0.3.3
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-sink v0.3.3
[INFO] [stderr]     Checking futures-task v0.3.3
[INFO] [stderr]    Compiling curl v0.4.25
[INFO] [stderr]    Compiling isahc v0.7.6
[INFO] [stderr]     Checking once_cell v1.3.1
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.2
[INFO] [stderr]    Compiling curl-sys v0.4.25
[INFO] [stderr]     Checking async-task v1.3.1
[INFO] [stderr]     Checking ring v0.16.11
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking serde_json v1.0.46
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-channel v0.3.3
[INFO] [stderr]     Checking sluice v0.4.2
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking kv-log-macro v1.0.4
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking webpki v0.21.2
[INFO] [stderr]     Checking sct v0.6.0
[INFO] [stderr]     Checking async-std v1.5.0
[INFO] [stderr]     Checking webpki-roots v0.17.0
[INFO] [stderr]     Checking rustls v0.16.0
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.10
[INFO] [stderr]    Compiling futures-macro v0.3.3
[INFO] [stderr]     Checking thiserror v1.0.10
[INFO] [stderr]     Checking futures-util v0.3.3
[INFO] [stderr]     Checking surf v1.0.3
[INFO] [stderr]     Checking futures-executor v0.3.3
[INFO] [stderr]     Checking futures v0.3.3
[INFO] [stderr]     Checking async-tls v0.6.0
[INFO] [stderr]     Checking soketto v0.3.2
[INFO] [stderr]     Checking quicksilver-utils-async v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 10s
[INFO] running `Command { std: "docker" "inspect" "4e788d9bb6b4e33ba501e60deba777526eb12c61d1f14aad158f4ef3d4964437", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e788d9bb6b4e33ba501e60deba777526eb12c61d1f14aad158f4ef3d4964437", kill_on_drop: false }`
[INFO] [stdout] 4e788d9bb6b4e33ba501e60deba777526eb12c61d1f14aad158f4ef3d4964437