[INFO] fetching crate peril 0.4.2...
[INFO] checking peril-0.4.2 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate peril 0.4.2 into /workspace/builds/worker-100/source
[INFO] validating manifest of crates.io crate peril 0.4.2 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 peril 0.4.2
[INFO] finished tweaking crates.io crate peril 0.4.2
[INFO] tweaked toml for crates.io crate peril 0.4.2 written to /workspace/builds/worker-100/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-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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] 60a1335078f6f650bcbf73e9743c5d2e30c551b7f4d782ac8a3c10101e100aae
[INFO] running `Command { std: "docker" "start" "-a" "60a1335078f6f650bcbf73e9743c5d2e30c551b7f4d782ac8a3c10101e100aae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60a1335078f6f650bcbf73e9743c5d2e30c551b7f4d782ac8a3c10101e100aae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60a1335078f6f650bcbf73e9743c5d2e30c551b7f4d782ac8a3c10101e100aae", kill_on_drop: false }`
[INFO] [stdout] 60a1335078f6f650bcbf73e9743c5d2e30c551b7f4d782ac8a3c10101e100aae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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] 19fb905a22e6e9d7b4f259416f85981a69e7570298124f60be4317f6cbc83a3d
[INFO] running `Command { std: "docker" "start" "-a" "19fb905a22e6e9d7b4f259416f85981a69e7570298124f60be4317f6cbc83a3d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]     Checking os-thread-local v0.1.3
[INFO] [stderr]     Checking peril v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `Arc::<T>::into_raw` that must be used
[INFO] [stdout]    --> src/lib.rs:279:17
[INFO] [stdout]     |
[INFO] [stdout] 279 |                 Arc::into_raw(boxed);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: losing the pointer will leak memory
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Arc::<T>::into_raw` that must be used
[INFO] [stdout]    --> src/lib.rs:587:13
[INFO] [stdout]     |
[INFO] [stdout] 587 |             Arc::into_raw(boxed);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: losing the pointer will leak memory
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Arc::<T>::into_raw` that must be used
[INFO] [stdout]    --> src/lib.rs:279:17
[INFO] [stdout]     |
[INFO] [stdout] 279 |                 Arc::into_raw(boxed);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: losing the pointer will leak memory
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Arc::<T>::into_raw` that must be used
[INFO] [stdout]    --> src/lib.rs:587:13
[INFO] [stdout]     |
[INFO] [stdout] 587 |             Arc::into_raw(boxed);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: losing the pointer will leak memory
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
[INFO] running `Command { std: "docker" "inspect" "19fb905a22e6e9d7b4f259416f85981a69e7570298124f60be4317f6cbc83a3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19fb905a22e6e9d7b4f259416f85981a69e7570298124f60be4317f6cbc83a3d", kill_on_drop: false }`
[INFO] [stdout] 19fb905a22e6e9d7b4f259416f85981a69e7570298124f60be4317f6cbc83a3d