[INFO] fetching crate polling 2.0.2...
[INFO] checking polling-2.0.2 against beta for pr-78714
[INFO] extracting crate polling 2.0.2 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate polling 2.0.2 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 polling 2.0.2
[INFO] finished tweaking crates.io crate polling 2.0.2
[INFO] tweaked toml for crates.io crate polling 2.0.2 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate polling 2.0.2 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] 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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5e306fa6ddd44b40a8acfe4d650e78b58f9c782a3ba42788f54af691b0fda4f1
[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" "5e306fa6ddd44b40a8acfe4d650e78b58f9c782a3ba42788f54af691b0fda4f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e306fa6ddd44b40a8acfe4d650e78b58f9c782a3ba42788f54af691b0fda4f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e306fa6ddd44b40a8acfe4d650e78b58f9c782a3ba42788f54af691b0fda4f1", kill_on_drop: false }`
[INFO] [stdout] 5e306fa6ddd44b40a8acfe4d650e78b58f9c782a3ba42788f54af691b0fda4f1
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/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] c431acf3e6569a721ff18421445df070e3da83f045b31e30b3a1189d7b628ef6
[INFO] running `Command { std: "docker" "start" "-a" "c431acf3e6569a721ff18421445df070e3da83f045b31e30b3a1189d7b628ef6", kill_on_drop: false }`
[INFO] [stderr]     Checking easy-parallel v3.1.0
[INFO] [stderr]     Checking polling v2.0.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "c431acf3e6569a721ff18421445df070e3da83f045b31e30b3a1189d7b628ef6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c431acf3e6569a721ff18421445df070e3da83f045b31e30b3a1189d7b628ef6", kill_on_drop: false }`
[INFO] [stdout] c431acf3e6569a721ff18421445df070e3da83f045b31e30b3a1189d7b628ef6