[INFO] fetching crate pollster 0.2.0...
[INFO] checking pollster-0.2.0 against beta for pr-78714
[INFO] extracting crate pollster 0.2.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate pollster 0.2.0 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 pollster 0.2.0
[INFO] finished tweaking crates.io crate pollster 0.2.0
[INFO] tweaked toml for crates.io crate pollster 0.2.0 written to /workspace/builds/worker-5/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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 71423cbebecde9311963781d84611e7b9d4289eebdba964f11c26cdc1b046f13
[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" "71423cbebecde9311963781d84611e7b9d4289eebdba964f11c26cdc1b046f13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71423cbebecde9311963781d84611e7b9d4289eebdba964f11c26cdc1b046f13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71423cbebecde9311963781d84611e7b9d4289eebdba964f11c26cdc1b046f13", kill_on_drop: false }`
[INFO] [stdout] 71423cbebecde9311963781d84611e7b9d4289eebdba964f11c26cdc1b046f13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e499e7be23be9de66ea92f5e3e616d4c87ab53f6a8e714b881224e6fc6699243
[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" "e499e7be23be9de66ea92f5e3e616d4c87ab53f6a8e714b881224e6fc6699243", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking pollster v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tokio v0.2.23
[INFO] [stderr]     Checking async-std v1.7.0
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.09s
[INFO] running `Command { std: "docker" "inspect" "e499e7be23be9de66ea92f5e3e616d4c87ab53f6a8e714b881224e6fc6699243", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e499e7be23be9de66ea92f5e3e616d4c87ab53f6a8e714b881224e6fc6699243", kill_on_drop: false }`
[INFO] [stdout] e499e7be23be9de66ea92f5e3e616d4c87ab53f6a8e714b881224e6fc6699243