[INFO] fetching crate volume 0.4.0...
[INFO] checking volume-0.4.0 against try#075992eda207e1647b699c8c8ada67b32ce7b115 for pr-77271
[INFO] extracting crate volume 0.4.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate volume 0.4.0 on toolchain 075992eda207e1647b699c8c8ada67b32ce7b115
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate volume 0.4.0
[INFO] finished tweaking crates.io crate volume 0.4.0
[INFO] tweaked toml for crates.io crate volume 0.4.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+075992eda207e1647b699c8c8ada67b32ce7b115" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded petgraph v0.2.10
[INFO] [stderr]   Downloaded daggy v0.4.1
[INFO] [stderr]   Downloaded time_calc v0.11.1
[INFO] [stderr]   Downloaded dsp-chain v0.13.1
[INFO] [stderr]   Downloaded sample v0.6.2
[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" "+075992eda207e1647b699c8c8ada67b32ce7b115" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd12a992fbe0bf2b15c952e4f8a5dfa52350781d66966c5c916fa0be23294629
[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" "fd12a992fbe0bf2b15c952e4f8a5dfa52350781d66966c5c916fa0be23294629", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd12a992fbe0bf2b15c952e4f8a5dfa52350781d66966c5c916fa0be23294629", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd12a992fbe0bf2b15c952e4f8a5dfa52350781d66966c5c916fa0be23294629", kill_on_drop: false }`
[INFO] [stdout] fd12a992fbe0bf2b15c952e4f8a5dfa52350781d66966c5c916fa0be23294629
[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" "+075992eda207e1647b699c8c8ada67b32ce7b115" "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] 0835e27e72e8d9b39431f69a4f596c98184adae7234f8a26d78523440f8ac06f
[INFO] running `Command { std: "docker" "start" "-a" "0835e27e72e8d9b39431f69a4f596c98184adae7234f8a26d78523440f8ac06f", kill_on_drop: false }`
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking sample v0.6.2
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking petgraph v0.2.10
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking daggy v0.4.1
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking time_calc v0.11.1
[INFO] [stderr]     Checking dsp-chain v0.13.1
[INFO] [stderr]     Checking volume v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Frame`
[INFO] [stdout]   --> src/lib.rs:58:19
[INFO] [stdout]    |
[INFO] [stdout] 58 |         use dsp::{Frame, Sample};
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Frame`
[INFO] [stdout]   --> src/lib.rs:58:19
[INFO] [stdout]    |
[INFO] [stdout] 58 |         use dsp::{Frame, Sample};
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.84s
[INFO] running `Command { std: "docker" "inspect" "0835e27e72e8d9b39431f69a4f596c98184adae7234f8a26d78523440f8ac06f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0835e27e72e8d9b39431f69a4f596c98184adae7234f8a26d78523440f8ac06f", kill_on_drop: false }`
[INFO] [stdout] 0835e27e72e8d9b39431f69a4f596c98184adae7234f8a26d78523440f8ac06f