[INFO] fetching crate audio-device 0.1.0-alpha.6...
[INFO] checking audio-device-0.1.0-alpha.6 against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] extracting crate audio-device 0.1.0-alpha.6 into /workspace/builds/worker-106/source
[INFO] validating manifest of crates.io crate audio-device 0.1.0-alpha.6 on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-106/source/Cargo.toml
[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: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41e03b5b0fb5c1b08c7502d98496f5f8ae62207df22dd1c2a96ce8ed6c283bab
[INFO] running `Command { std: "docker" "start" "-a" "41e03b5b0fb5c1b08c7502d98496f5f8ae62207df22dd1c2a96ce8ed6c283bab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41e03b5b0fb5c1b08c7502d98496f5f8ae62207df22dd1c2a96ce8ed6c283bab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41e03b5b0fb5c1b08c7502d98496f5f8ae62207df22dd1c2a96ce8ed6c283bab", kill_on_drop: false }`
[INFO] [stdout] 41e03b5b0fb5c1b08c7502d98496f5f8ae62207df22dd1c2a96ce8ed6c283bab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3fffe454966d9eeca22e98bb7cf25ae78bbd6e7402d52b18a48d9bc0f7f10c2
[INFO] running `Command { std: "docker" "start" "-a" "c3fffe454966d9eeca22e98bb7cf25ae78bbd6e7402d52b18a48d9bc0f7f10c2", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   libc v0.2.93: default, std
[INFO] [stderr]   syn v1.0.69 (as host dependency): full
[INFO] [stderr]   tokio v1.5.0: bytes, fs, full, io-std, io-util, libc, macros, memchr, mio, net, num_cpus, once_cell, parking_lot, process, rt-multi-thread, signal, signal-hook-registry, sync, time, tokio-macros, winapi
[INFO] [stderr] 
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 getrandom v0.2.2
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking audio-core v0.2.0-alpha.3
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]     Checking lock_api v0.4.3
[INFO] [stderr]     Checking audio v0.2.0-alpha.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking parking_lot v0.11.1
[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 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/loom/sync.rs (1 fix)
[INFO] [stderr]        Fixed src/loom/mod.rs (1 fix)
[INFO] [stdout] warning: struct is never constructed: `Mutex`
[INFO] [stdout]   --> src/loom/sync.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub(crate) struct Mutex<T> {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/loom/sync.rs:28:19
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub(crate) fn new(value: T) -> Self {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lock`
[INFO] [stdout]   --> src/loom/sync.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub(crate) fn lock(&self) -> MutexGuard<'_, T> {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Mutex`
[INFO] [stdout]   --> src/loom/sync.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub(crate) struct Mutex<T> {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/loom/sync.rs:28:19
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub(crate) fn new(value: T) -> Self {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lock`
[INFO] [stdout]   --> src/loom/sync.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub(crate) fn lock(&self) -> MutexGuard<'_, T> {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.11s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]     Checking ste v0.1.0-alpha.9
[INFO] [stderr]     Checking audio-device v0.1.0-alpha.6 (/tmp/fixit)
[INFO] [stdout] warning: struct is never constructed: `Mutex`
[INFO] [stdout]   --> src/loom/sync.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub(crate) struct Mutex<T> {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/loom/sync.rs:28:19
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub(crate) fn new(value: T) -> Self {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lock`
[INFO] [stdout]   --> src/loom/sync.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub(crate) fn lock(&self) -> MutexGuard<'_, T> {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Mutex`
[INFO] [stdout]   --> src/loom/sync.rs:23:19
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub(crate) struct Mutex<T> {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/loom/sync.rs:28:19
[INFO] [stdout]    |
[INFO] [stdout] 28 |     pub(crate) fn new(value: T) -> Self {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lock`
[INFO] [stdout]   --> src/loom/sync.rs:34:19
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub(crate) fn lock(&self) -> MutexGuard<'_, T> {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.30s
[INFO] running `Command { std: "docker" "inspect" "c3fffe454966d9eeca22e98bb7cf25ae78bbd6e7402d52b18a48d9bc0f7f10c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3fffe454966d9eeca22e98bb7cf25ae78bbd6e7402d52b18a48d9bc0f7f10c2", kill_on_drop: false }`
[INFO] [stdout] c3fffe454966d9eeca22e98bb7cf25ae78bbd6e7402d52b18a48d9bc0f7f10c2