[INFO] fetching crate concurrency_traits 0.7.2...
[INFO] checking concurrency_traits-0.7.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate concurrency_traits 0.7.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate concurrency_traits 0.7.2
[INFO] finished tweaking crates.io crate concurrency_traits 0.7.2
[INFO] tweaked toml for crates.io crate concurrency_traits 0.7.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate concurrency_traits 0.7.2 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 39 packages to latest compatible versions
[INFO] [stderr]       Adding parking_lot v0.11.2 (available: v0.12.5)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] bfed48cdce61ea681304ec4021fefa26c72f4e2605a5f6b2e61ef256759e8640
[INFO] running `Command { std: "docker" "start" "-a" "bfed48cdce61ea681304ec4021fefa26c72f4e2605a5f6b2e61ef256759e8640", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfed48cdce61ea681304ec4021fefa26c72f4e2605a5f6b2e61ef256759e8640", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfed48cdce61ea681304ec4021fefa26c72f4e2605a5f6b2e61ef256759e8640", kill_on_drop: false }`
[INFO] [stdout] bfed48cdce61ea681304ec4021fefa26c72f4e2605a5f6b2e61ef256759e8640
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f7921f9db4c7c1623d9ae7f25d6864e34411b51648496dc70e08e527116645d0
[INFO] running `Command { std: "docker" "start" "-a" "f7921f9db4c7c1623d9ae7f25d6864e34411b51648496dc70e08e527116645d0", kill_on_drop: false }`
[INFO] [stderr]     Checking atomic_swapping v0.1.0
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking simple_futures v0.1.2
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stderr]    Compiling async-trait v0.1.89
[INFO] [stderr]     Checking concurrency_traits v0.7.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `EnsureSend` is never used
[INFO] [stdout]   --> src/lib.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | trait EnsureSend: Send {}
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `EnsureSync` is never used
[INFO] [stdout]   --> src/lib.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | trait EnsureSync: Sync {}
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<<Self as TryThreadSpawner<O>>::ThreadHandle, std::convert::Infallible>
[INFO] [stdout]   --> src/lib.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |             Self::try_spawn(func).unwrap()
[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: Result<<Self as TryJoinableHandle>::Output, std::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |             self.try_join().unwrap()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<JoinHandle<O>, std::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:210:59
[INFO] [stdout]     |
[INFO] [stdout] 210 |           ) -> Result<Self::ThreadHandle, Self::SpawnError> {
[INFO] [stdout]     |  ___________________________________________________________^
[INFO] [stdout] 211 | |             Ok(std::thread::spawn(func))
[INFO] [stdout] 212 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<JoinHandle<O>, std::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:211:13
[INFO] [stdout]     |
[INFO] [stdout] 211 |             Ok(std::thread::spawn(func))
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `EnsureSend` is never used
[INFO] [stdout]   --> src/lib.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | trait EnsureSend: Send {}
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `EnsureSync` is never used
[INFO] [stdout]   --> src/lib.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | trait EnsureSync: Sync {}
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<<Self as TryThreadSpawner<O>>::ThreadHandle, std::convert::Infallible>
[INFO] [stdout]   --> src/lib.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |             Self::try_spawn(func).unwrap()
[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: Result<<Self as TryJoinableHandle>::Output, std::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |             self.try_join().unwrap()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `concurrency_traits` (lib test) due to 4 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<JoinHandle<O>, std::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:210:59
[INFO] [stdout]     |
[INFO] [stdout] 210 |           ) -> Result<Self::ThreadHandle, Self::SpawnError> {
[INFO] [stdout]     |  ___________________________________________________________^
[INFO] [stdout] 211 | |             Ok(std::thread::spawn(func))
[INFO] [stdout] 212 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<JoinHandle<O>, std::convert::Infallible>
[INFO] [stdout]    --> src/lib.rs:211:13
[INFO] [stdout]     |
[INFO] [stdout] 211 |             Ok(std::thread::spawn(func))
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `concurrency_traits` (lib) due to 4 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "f7921f9db4c7c1623d9ae7f25d6864e34411b51648496dc70e08e527116645d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7921f9db4c7c1623d9ae7f25d6864e34411b51648496dc70e08e527116645d0", kill_on_drop: false }`
[INFO] [stdout] f7921f9db4c7c1623d9ae7f25d6864e34411b51648496dc70e08e527116645d0
