[INFO] fetching crate nullvec 0.2.0...
[INFO] checking nullvec-0.2.0 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate nullvec 0.2.0 into /workspace/builds/worker-113/source
[INFO] validating manifest of crates.io crate nullvec 0.2.0 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate nullvec 0.2.0
[INFO] finished tweaking crates.io crate nullvec 0.2.0
[INFO] tweaked toml for crates.io crate nullvec 0.2.0 written to /workspace/builds/worker-113/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7685e18c21cb82018cff25f656b9e2f1ae5fca4958e743f34a1cfd1d6217604e
[INFO] running `Command { std: "docker" "start" "-a" "7685e18c21cb82018cff25f656b9e2f1ae5fca4958e743f34a1cfd1d6217604e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7685e18c21cb82018cff25f656b9e2f1ae5fca4958e743f34a1cfd1d6217604e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7685e18c21cb82018cff25f656b9e2f1ae5fca4958e743f34a1cfd1d6217604e", kill_on_drop: false }`
[INFO] [stdout] 7685e18c21cb82018cff25f656b9e2f1ae5fca4958e743f34a1cfd1d6217604e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3cb1171651a2ac1b0522eddd3b8f9bc0f8bb8b3a572dcf596b0a89fc258b2f32
[INFO] running `Command { std: "docker" "start" "-a" "3cb1171651a2ac1b0522eddd3b8f9bc0f8bb8b3a572dcf596b0a89fc258b2f32", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking nullvec v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::convert::From::from` that must be used
[INFO] [stdout]    --> src/nullvec/nullvec_convert.rs:139:9
[INFO] [stdout]     |
[INFO] [stdout] 139 |         Vec::<f64>::from(nv);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` 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 7.46s
[INFO] running `Command { std: "docker" "inspect" "3cb1171651a2ac1b0522eddd3b8f9bc0f8bb8b3a572dcf596b0a89fc258b2f32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cb1171651a2ac1b0522eddd3b8f9bc0f8bb8b3a572dcf596b0a89fc258b2f32", kill_on_drop: false }`
[INFO] [stdout] 3cb1171651a2ac1b0522eddd3b8f9bc0f8bb8b3a572dcf596b0a89fc258b2f32