[INFO] fetching crate audio-device 0.1.0-alpha.6...
[INFO] checking audio-device-0.1.0-alpha.6 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate audio-device 0.1.0-alpha.6 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate audio-device 0.1.0-alpha.6
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate audio-device 0.1.0-alpha.6
[INFO] tweaked toml for crates.io crate audio-device 0.1.0-alpha.6 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate audio-device 0.1.0-alpha.6 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate audio-device 0.1.0-alpha.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58102fe7fd953a33f71045e9cbbcbd278e034a17a10748a5e8ea8bc29b26e36c
[INFO] running `Command { std: "docker" "start" "-a" "58102fe7fd953a33f71045e9cbbcbd278e034a17a10748a5e8ea8bc29b26e36c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58102fe7fd953a33f71045e9cbbcbd278e034a17a10748a5e8ea8bc29b26e36c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58102fe7fd953a33f71045e9cbbcbd278e034a17a10748a5e8ea8bc29b26e36c", kill_on_drop: false }`
[INFO] [stdout] 58102fe7fd953a33f71045e9cbbcbd278e034a17a10748a5e8ea8bc29b26e36c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38c69347164243aae922f1edf97f40d216b22514e363cb630a94d822a8bdadb1
[INFO] running `Command { std: "docker" "start" "-a" "38c69347164243aae922f1edf97f40d216b22514e363cb630a94d822a8bdadb1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking lock_api v0.4.3
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking audio-core v0.2.0-alpha.3
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking audio v0.2.0-alpha.3
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking ste v0.1.0-alpha.9
[INFO] [stderr]     Checking audio-device v0.1.0-alpha.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition name: `loom`
[INFO] [stdout]  --> src/runtime/atomic_waker.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(any(loom, not(feature = "sync")), allow(dead_code, unreachable_pub))]
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(loom)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(loom)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `sync`
[INFO] [stdout]  --> src/runtime/atomic_waker.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(any(loom, not(feature = "sync")), allow(dead_code, unreachable_pub))]
[INFO] [stdout]   |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `alsa`, `alsa-sys`, `default`, `events-driver`, `libc`, `nix`, `poll-driver`, `unix`, `wasapi`, `windows`, and `windows-sys`
[INFO] [stdout]   = help: consider adding `sync` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `::std::thread`
[INFO] [stdout]  --> src/loom/mod.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub(crate) use ::std::thread;
[INFO] [stdout]   |                ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `::std::sync::Arc`
[INFO] [stdout]  --> src/loom/sync.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub(crate) use ::std::sync::Arc;
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `loom`
[INFO] [stdout]  --> src/runtime/atomic_waker.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(any(loom, not(feature = "sync")), allow(dead_code, unreachable_pub))]
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(loom)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(loom)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `sync`
[INFO] [stdout]  --> src/runtime/atomic_waker.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(any(loom, not(feature = "sync")), allow(dead_code, unreachable_pub))]
[INFO] [stdout]   |                           ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `alsa`, `alsa-sys`, `default`, `events-driver`, `libc`, `nix`, `poll-driver`, `unix`, `wasapi`, `windows`, and `windows-sys`
[INFO] [stdout]   = help: consider adding `sync` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `::std::thread`
[INFO] [stdout]  --> src/loom/mod.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub(crate) use ::std::thread;
[INFO] [stdout]   |                ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `::std::sync::Arc`
[INFO] [stdout]  --> src/loom/sync.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub(crate) use ::std::sync::Arc;
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MutexGuard` is never constructed
[INFO] [stdout]  --> src/loom/sync.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub(crate) struct MutexGuard<'a, T> {
[INFO] [stdout]   |                   ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Mutex` is never constructed
[INFO] [stdout]   --> src/loom/sync.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub(crate) struct Mutex<T> {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `lock` are never used
[INFO] [stdout]   --> src/loom/sync.rs:28:19
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T> Mutex<T> {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 28 |     pub(crate) fn new(value: T) -> Self {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn lock(&self) -> MutexGuard<'_, T> {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<Runtime, error::Error>
[INFO] [stdout]   --> src/runtime/mod.rs:69:34
[INFO] [stdout]    |
[INFO] [stdout] 69 |       pub fn new() -> Result<Self> {
[INFO] [stdout]    |  __________________________________^
[INFO] [stdout] 70 | |         Ok(Self {
[INFO] [stdout] 71 | |             #[cfg(feature = "events-driver")]
[INFO] [stdout] 72 | |             events: self::events::EventsDriver::new()?,
[INFO] [stdout] ...  |
[INFO] [stdout] 75 | |         })
[INFO] [stdout] 76 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<Runtime, error::Error>
[INFO] [stdout]   --> src/runtime/mod.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 | /         Ok(Self {
[INFO] [stdout] 71 | |             #[cfg(feature = "events-driver")]
[INFO] [stdout] 72 | |             events: self::events::EventsDriver::new()?,
[INFO] [stdout] 73 | |             #[cfg(feature = "poll-driver")]
[INFO] [stdout] 74 | |             poll: self::poll::PollDriver::new()?,
[INFO] [stdout] 75 | |         })
[INFO] [stdout]    | |__________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MutexGuard` is never constructed
[INFO] [stdout]  --> src/loom/sync.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub(crate) struct MutexGuard<'a, T> {
[INFO] [stdout]   |                   ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Mutex` is never constructed
[INFO] [stdout]   --> src/loom/sync.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub(crate) struct Mutex<T> {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `lock` are never used
[INFO] [stdout]   --> src/loom/sync.rs:28:19
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T> Mutex<T> {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 28 |     pub(crate) fn new(value: T) -> Self {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub(crate) fn lock(&self) -> MutexGuard<'_, T> {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<Runtime, error::Error>
[INFO] [stdout]   --> src/runtime/mod.rs:69:34
[INFO] [stdout]    |
[INFO] [stdout] 69 |       pub fn new() -> Result<Self> {
[INFO] [stdout]    |  __________________________________^
[INFO] [stdout] 70 | |         Ok(Self {
[INFO] [stdout] 71 | |             #[cfg(feature = "events-driver")]
[INFO] [stdout] 72 | |             events: self::events::EventsDriver::new()?,
[INFO] [stdout] ...  |
[INFO] [stdout] 75 | |         })
[INFO] [stdout] 76 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<Runtime, error::Error>
[INFO] [stdout]   --> src/runtime/mod.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 | /         Ok(Self {
[INFO] [stdout] 71 | |             #[cfg(feature = "events-driver")]
[INFO] [stdout] 72 | |             events: self::events::EventsDriver::new()?,
[INFO] [stdout] 73 | |             #[cfg(feature = "poll-driver")]
[INFO] [stdout] 74 | |             poll: self::poll::PollDriver::new()?,
[INFO] [stdout] 75 | |         })
[INFO] [stdout]    | |__________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `audio-device` (lib) due to 2 previous errors; 7 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `audio-device` (lib test) due to 2 previous errors; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "38c69347164243aae922f1edf97f40d216b22514e363cb630a94d822a8bdadb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38c69347164243aae922f1edf97f40d216b22514e363cb630a94d822a8bdadb1", kill_on_drop: false }`
[INFO] [stdout] 38c69347164243aae922f1edf97f40d216b22514e363cb630a94d822a8bdadb1
