[INFO] fetching crate async-peek 0.3.2...
[INFO] checking async-peek-0.3.2 against master#d62d3f7fa9a91d933213cc10e20e740608983f64 for pr-77015
[INFO] extracting crate async-peek 0.3.2 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate async-peek 0.3.2 on toolchain d62d3f7fa9a91d933213cc10e20e740608983f64
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async-peek 0.3.2
[INFO] finished tweaking crates.io crate async-peek 0.3.2
[INFO] tweaked toml for crates.io crate async-peek 0.3.2 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "metadata" "--no-deps" "--format-version=1", 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] b9d75bfee2d018fb6ed92abd49af15bf1398f0562bfc700ca1f9da184cd32494
[INFO] running `Command { std: "docker" "start" "-a" "b9d75bfee2d018fb6ed92abd49af15bf1398f0562bfc700ca1f9da184cd32494", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9d75bfee2d018fb6ed92abd49af15bf1398f0562bfc700ca1f9da184cd32494", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9d75bfee2d018fb6ed92abd49af15bf1398f0562bfc700ca1f9da184cd32494", kill_on_drop: false }`
[INFO] [stdout] b9d75bfee2d018fb6ed92abd49af15bf1398f0562bfc700ca1f9da184cd32494
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+d62d3f7fa9a91d933213cc10e20e740608983f64" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 087ec50a03eebac6e54617d3031a46fe425bc5cf41765c319452aae8a04f4f8f
[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" "087ec50a03eebac6e54617d3031a46fe425bc5cf41765c319452aae8a04f4f8f", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking once_cell v1.4.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking arc-swap v0.4.7
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]     Checking vec-arena v0.5.2
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking futures-micro v0.3.1
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking async-semaphore v1.2.0
[INFO] [stderr]     Checking nb-connect v1.0.1
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]     Checking ufut v0.3.1
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking futures-lite v1.8.0
[INFO] [stderr]     Checking async-peek v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking async-barrier v1.1.0
[INFO] [stderr]     Checking async-rwlock v1.3.0
[INFO] [stderr]     Checking async-lock v2.2.0
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking async-channel v1.4.2
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking polling v1.1.0
[INFO] [stderr]     Checking polling v0.1.9
[INFO] [stderr]     Checking blocking v1.0.0
[INFO] [stderr]     Checking async-io v0.2.7
[INFO] [stderr]     Checking async-io v1.1.6
[INFO] [stderr]     Checking async-executor v0.2.1
[INFO] [stderr]     Checking blocking v0.6.1
[INFO] [stderr]     Checking async-fs v1.3.0
[INFO] [stderr]     Checking async-net v1.4.6
[INFO] [stderr]     Checking async-process v0.1.3
[INFO] [stderr]     Checking smol v0.4.3
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.00s
[INFO] running `Command { std: "docker" "inspect" "087ec50a03eebac6e54617d3031a46fe425bc5cf41765c319452aae8a04f4f8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "087ec50a03eebac6e54617d3031a46fe425bc5cf41765c319452aae8a04f4f8f", kill_on_drop: false }`
[INFO] [stdout] 087ec50a03eebac6e54617d3031a46fe425bc5cf41765c319452aae8a04f4f8f