[INFO] fetching crate brain-rs 0.1.0...
[INFO] checking brain-rs-0.1.0 against master#da897dfb6daa268a965d2d73620316ba56020a19 for pr-76219
[INFO] extracting crate brain-rs 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate brain-rs 0.1.0 on toolchain da897dfb6daa268a965d2d73620316ba56020a19
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate brain-rs 0.1.0
[INFO] finished tweaking crates.io crate brain-rs 0.1.0
[INFO] tweaked toml for crates.io crate brain-rs 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+da897dfb6daa268a965d2d73620316ba56020a19" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+da897dfb6daa268a965d2d73620316ba56020a19" "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] f7b7cf40d6f087fc0d275a509804a181e6e0cbf929934f992482cd03f7db0195
[INFO] running `Command { std: "docker" "start" "-a" "f7b7cf40d6f087fc0d275a509804a181e6e0cbf929934f992482cd03f7db0195", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7b7cf40d6f087fc0d275a509804a181e6e0cbf929934f992482cd03f7db0195", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7b7cf40d6f087fc0d275a509804a181e6e0cbf929934f992482cd03f7db0195", kill_on_drop: false }`
[INFO] [stdout] f7b7cf40d6f087fc0d275a509804a181e6e0cbf929934f992482cd03f7db0195
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+da897dfb6daa268a965d2d73620316ba56020a19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fa345bbc7c9d2db9aa41f8bfc3c03cf26fcef904e8c13cc7b7613689cf9402ee
[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" "fa345bbc7c9d2db9aa41f8bfc3c03cf26fcef904e8c13cc7b7613689cf9402ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking brain-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> benches/bench_brain.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         execute(code, read_buffer.as_bytes(), &mut write_buffer);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.15s
[INFO] running `Command { std: "docker" "inspect" "fa345bbc7c9d2db9aa41f8bfc3c03cf26fcef904e8c13cc7b7613689cf9402ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa345bbc7c9d2db9aa41f8bfc3c03cf26fcef904e8c13cc7b7613689cf9402ee", kill_on_drop: false }`
[INFO] [stdout] fa345bbc7c9d2db9aa41f8bfc3c03cf26fcef904e8c13cc7b7613689cf9402ee