[INFO] fetching crate rtos 0.0.1...
[INFO] checking rtos-0.0.1 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate rtos 0.0.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate rtos 0.0.1 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rtos 0.0.1
[INFO] finished tweaking crates.io crate rtos 0.0.1
[INFO] tweaked toml for crates.io crate rtos 0.0.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dede93a488f55d2ccfb5cf2abd0fb0e3db7010bc3a9711ab9bc172fc28e15da3
[INFO] running `Command { std: "docker" "start" "-a" "dede93a488f55d2ccfb5cf2abd0fb0e3db7010bc3a9711ab9bc172fc28e15da3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dede93a488f55d2ccfb5cf2abd0fb0e3db7010bc3a9711ab9bc172fc28e15da3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dede93a488f55d2ccfb5cf2abd0fb0e3db7010bc3a9711ab9bc172fc28e15da3", kill_on_drop: false }`
[INFO] [stdout] dede93a488f55d2ccfb5cf2abd0fb0e3db7010bc3a9711ab9bc172fc28e15da3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 17f32daed3129eae57610da5497aea940bb13775395cd20b7ef5e9cbb936f967
[INFO] running `Command { std: "docker" "start" "-a" "17f32daed3129eae57610da5497aea940bb13775395cd20b7ef5e9cbb936f967", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rtos v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `idle_hook`
[INFO] [stdout]  --> src/lib.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn start(idle_hook: impl FnMut()) {}
[INFO] [stdout]   |              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_idle_hook`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `entrypoint`
[INFO] [stdout]   --> src/task.rs:31:25
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn spawn(&self, entrypoint: impl FnOnce() -> ()) -> TaskHandle {
[INFO] [stdout]    |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_entrypoint`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idle_hook`
[INFO] [stdout]  --> src/lib.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn start(idle_hook: impl FnMut()) {}
[INFO] [stdout]   |              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_idle_hook`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `entrypoint`
[INFO] [stdout]   --> src/task.rs:31:25
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn spawn(&self, entrypoint: impl FnOnce() -> ()) -> TaskHandle {
[INFO] [stdout]    |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_entrypoint`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Low`
[INFO] [stdout]  --> src/task.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Low,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BelowNormal`
[INFO] [stdout]  --> src/task.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     BelowNormal,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `AboveNormal`
[INFO] [stdout]  --> src/task.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     AboveNormal,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `High`
[INFO] [stdout]  --> src/task.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     High,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Realtime`
[INFO] [stdout]  --> src/task.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Realtime,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TaskHandle`
[INFO] [stdout]   --> src/task.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct TaskHandle {}
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `stack_size`
[INFO] [stdout]   --> src/task.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     stack_size: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `priority`
[INFO] [stdout]   --> src/task.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     priority: Priority,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/task.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `spawn`
[INFO] [stdout]   --> src/task.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn spawn(&self, entrypoint: impl FnOnce() -> ()) -> TaskHandle {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `spawn`
[INFO] [stdout]   --> src/task.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn spawn(entrypoint: impl FnOnce() -> ()) -> TaskHandle {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Low`
[INFO] [stdout]  --> src/task.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Low,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BelowNormal`
[INFO] [stdout]  --> src/task.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     BelowNormal,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `AboveNormal`
[INFO] [stdout]  --> src/task.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     AboveNormal,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `High`
[INFO] [stdout]  --> src/task.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     High,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Realtime`
[INFO] [stdout]  --> src/task.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Realtime,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `TaskHandle`
[INFO] [stdout]   --> src/task.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct TaskHandle {}
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `stack_size`
[INFO] [stdout]   --> src/task.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     stack_size: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `priority`
[INFO] [stdout]   --> src/task.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     priority: Priority,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/task.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `spawn`
[INFO] [stdout]   --> src/task.rs:31:12
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn spawn(&self, entrypoint: impl FnOnce() -> ()) -> TaskHandle {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `spawn`
[INFO] [stdout]   --> src/task.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn spawn(entrypoint: impl FnOnce() -> ()) -> TaskHandle {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "17f32daed3129eae57610da5497aea940bb13775395cd20b7ef5e9cbb936f967", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17f32daed3129eae57610da5497aea940bb13775395cd20b7ef5e9cbb936f967", kill_on_drop: false }`
[INFO] [stdout] 17f32daed3129eae57610da5497aea940bb13775395cd20b7ef5e9cbb936f967