[INFO] fetching crate future-parking_lot 0.3.3...
[INFO] checking future-parking_lot-0.3.3 against master#4d1bd0db7f489b22c6d8aa2385937a95412c015b for pr-114682
[INFO] extracting crate future-parking_lot 0.3.3 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate future-parking_lot 0.3.3 on toolchain 4d1bd0db7f489b22c6d8aa2385937a95412c015b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate future-parking_lot 0.3.3
[INFO] finished tweaking crates.io crate future-parking_lot 0.3.3
[INFO] tweaked toml for crates.io crate future-parking_lot 0.3.3 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-macros v0.2.0-alpha.6
[INFO] [stderr]   Downloaded tokio-codec v0.2.0-alpha.6
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded tokio-fs v0.2.0-alpha.6
[INFO] [stderr]   Downloaded tokio-io v0.2.0-alpha.6
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded crossbeam-queue v0.1.2
[INFO] [stderr]   Downloaded tokio-timer v0.3.0-alpha.6
[INFO] [stderr]   Downloaded crossbeam-channel v0.3.9
[INFO] [stderr]   Downloaded tokio-executor v0.2.0-alpha.6
[INFO] [stderr]   Downloaded tokio-net v0.2.0-alpha.6
[INFO] [stderr]   Downloaded tokio v0.2.0-alpha.6
[INFO] [stderr]   Downloaded tokio-sync v0.2.0-alpha.6
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77aac3c466df51fa0967791c8f8c6c1a41130a28800fa1c886f95cc49996c8f6
[INFO] running `Command { std: "docker" "start" "-a" "77aac3c466df51fa0967791c8f8c6c1a41130a28800fa1c886f95cc49996c8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77aac3c466df51fa0967791c8f8c6c1a41130a28800fa1c886f95cc49996c8f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77aac3c466df51fa0967791c8f8c6c1a41130a28800fa1c886f95cc49996c8f6", kill_on_drop: false }`
[INFO] [stdout] 77aac3c466df51fa0967791c8f8c6c1a41130a28800fa1c886f95cc49996c8f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+4d1bd0db7f489b22c6d8aa2385937a95412c015b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7806ede835ce57db3ba4f3205672aec07ca6d26a834d0c4963bf25336f69814f
[INFO] running `Command { std: "docker" "start" "-a" "7806ede835ce57db3ba4f3205672aec07ca6d26a834d0c4963bf25336f69814f", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling syn v2.0.42
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking future-parking_lot v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicBool::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/mutex.rs:38:28
[INFO] [stdout]    |
[INFO] [stdout] 38 |         while self.locking.compare_and_swap(false, true, Ordering::Relaxed) {}
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:7:9
[INFO] [stdout]    |
[INFO] [stdout] 7  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(deprecated)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/mutex.rs:56:25
[INFO] [stdout]    |
[INFO] [stdout] 56 |             self.wakers.compare_and_swap(v, Box::into_raw(temp), Ordering::Relaxed);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicBool::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/rwlock/mod.rs:49:28
[INFO] [stdout]    |
[INFO] [stdout] 49 |         while self.locking.compare_and_swap(false, true, Ordering::Relaxed) {}
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/rwlock/mod.rs:67:25
[INFO] [stdout]    |
[INFO] [stdout] 67 |             self.wakers.compare_and_swap(v, Box::into_raw(temp), Ordering::Relaxed);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/mutex.rs:74:22
[INFO] [stdout]    |
[INFO] [stdout] 74 |             unsafe { Box::from_raw(v) };
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]    = note: `#[deny(unused_must_use)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 74 |             unsafe { let _ = Box::from_raw(v); };
[INFO] [stdout]    |                      +++++++                 +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/rwlock/mod.rs:85:22
[INFO] [stdout]    |
[INFO] [stdout] 85 |             unsafe { Box::from_raw(v) };
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 85 |             unsafe { let _ = Box::from_raw(v); };
[INFO] [stdout]    |                      +++++++                 +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking crossbeam-deque v0.7.4
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `future-parking_lot` (lib) due to 7 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7806ede835ce57db3ba4f3205672aec07ca6d26a834d0c4963bf25336f69814f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7806ede835ce57db3ba4f3205672aec07ca6d26a834d0c4963bf25336f69814f", kill_on_drop: false }`
[INFO] [stdout] 7806ede835ce57db3ba4f3205672aec07ca6d26a834d0c4963bf25336f69814f
[INFO] checking future-parking_lot-0.3.3 against try#785364c7e5e0804473a3fddfb579798ea14e3493 for pr-114682
[INFO] extracting crate future-parking_lot 0.3.3 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate future-parking_lot 0.3.3 on toolchain 785364c7e5e0804473a3fddfb579798ea14e3493
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate future-parking_lot 0.3.3
[INFO] finished tweaking crates.io crate future-parking_lot 0.3.3
[INFO] tweaked toml for crates.io crate future-parking_lot 0.3.3 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f051f325ff754efd426974a5b6915388007e6d9ccb6c3019397090a4afd2072d
[INFO] running `Command { std: "docker" "start" "-a" "f051f325ff754efd426974a5b6915388007e6d9ccb6c3019397090a4afd2072d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f051f325ff754efd426974a5b6915388007e6d9ccb6c3019397090a4afd2072d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f051f325ff754efd426974a5b6915388007e6d9ccb6c3019397090a4afd2072d", kill_on_drop: false }`
[INFO] [stdout] f051f325ff754efd426974a5b6915388007e6d9ccb6c3019397090a4afd2072d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+785364c7e5e0804473a3fddfb579798ea14e3493" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8187910de3eca698378b79a47e72f6256486428edca21618601211a4eb202079
[INFO] running `Command { std: "docker" "start" "-a" "8187910de3eca698378b79a47e72f6256486428edca21618601211a4eb202079", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking net2 v0.2.39
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling syn v2.0.42
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking future-parking_lot v0.3.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicBool::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/mutex.rs:38:28
[INFO] [stdout]    |
[INFO] [stdout] 38 |         while self.locking.compare_and_swap(false, true, Ordering::Relaxed) {}
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:7:9
[INFO] [stdout]    |
[INFO] [stdout] 7  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(deprecated)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/mutex.rs:56:25
[INFO] [stdout]    |
[INFO] [stdout] 56 |             self.wakers.compare_and_swap(v, Box::into_raw(temp), Ordering::Relaxed);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicBool::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/rwlock/mod.rs:49:28
[INFO] [stdout]    |
[INFO] [stdout] 49 |         while self.locking.compare_and_swap(false, true, Ordering::Relaxed) {}
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicPtr::<T>::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/rwlock/mod.rs:67:25
[INFO] [stdout]    |
[INFO] [stdout] 67 |             self.wakers.compare_and_swap(v, Box::into_raw(temp), Ordering::Relaxed);
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/mutex.rs:74:22
[INFO] [stdout]    |
[INFO] [stdout] 74 |             unsafe { Box::from_raw(v) };
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]    = note: `#[deny(unused_must_use)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 74 |             unsafe { let _ = Box::from_raw(v); };
[INFO] [stdout]    |                      +++++++                 +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]   --> src/rwlock/mod.rs:85:22
[INFO] [stdout]    |
[INFO] [stdout] 85 |             unsafe { Box::from_raw(v) };
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 85 |             unsafe { let _ = Box::from_raw(v); };
[INFO] [stdout]    |                      +++++++                 +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `future-parking_lot` (lib) due to 7 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8187910de3eca698378b79a47e72f6256486428edca21618601211a4eb202079", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8187910de3eca698378b79a47e72f6256486428edca21618601211a4eb202079", kill_on_drop: false }`
[INFO] [stdout] 8187910de3eca698378b79a47e72f6256486428edca21618601211a4eb202079
