[INFO] fetching crate polling 0.1.5...
[INFO] checking polling-0.1.5 against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] extracting crate polling 0.1.5 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate polling 0.1.5 on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polling 0.1.5
[INFO] finished tweaking crates.io crate polling 0.1.5
[INFO] tweaked toml for crates.io crate polling 0.1.5 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate polling 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 45799603dd4d6b1baa8a3d46b3e5f7f46f00961fdc06a3e6ea8913d7725b59c1
[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" "45799603dd4d6b1baa8a3d46b3e5f7f46f00961fdc06a3e6ea8913d7725b59c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45799603dd4d6b1baa8a3d46b3e5f7f46f00961fdc06a3e6ea8913d7725b59c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45799603dd4d6b1baa8a3d46b3e5f7f46f00961fdc06a3e6ea8913d7725b59c1", kill_on_drop: false }`
[INFO] [stdout] 45799603dd4d6b1baa8a3d46b3e5f7f46f00961fdc06a3e6ea8913d7725b59c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a791db865ac67b0e82597a373fdbe1e981621db726abcb32eeb05558c20185a
[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" "5a791db865ac67b0e82597a373fdbe1e981621db726abcb32eeb05558c20185a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]     Checking polling v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.82s
[INFO] running `Command { std: "docker" "inspect" "5a791db865ac67b0e82597a373fdbe1e981621db726abcb32eeb05558c20185a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a791db865ac67b0e82597a373fdbe1e981621db726abcb32eeb05558c20185a", kill_on_drop: false }`
[INFO] [stdout] 5a791db865ac67b0e82597a373fdbe1e981621db726abcb32eeb05558c20185a