[INFO] crate coerce-rt 0.2.2 is already in cache
[INFO] checking coerce-rt-0.2.2 against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] extracting crate coerce-rt 0.2.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate coerce-rt 0.2.2 on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate coerce-rt 0.2.2
[INFO] finished tweaking crates.io crate coerce-rt 0.2.2
[INFO] tweaked toml for crates.io crate coerce-rt 0.2.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 29a495b55666ade1215c7f13721f1db891f3a4ac7e88728448285877b8f44518
[INFO] running `"docker" "start" "-a" "29a495b55666ade1215c7f13721f1db891f3a4ac7e88728448285877b8f44518"`
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling async-trait v0.1.30
[INFO] [stderr]     Checking tokio v0.2.17
[INFO] [stderr]     Checking serde v1.0.106
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking coerce-rt v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary braces around block return value
[INFO] [stderr]  --> src/actor/context.rs:5:48
[INFO] [stderr]   |
[INFO] [stderr] 5 |     static ref CURRENT_CONTEXT: ActorContext = { ActorContext::new() };
[INFO] [stderr]   |                                                ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary braces around block return value
[INFO] [stderr]  --> src/actor/context.rs:5:48
[INFO] [stderr]   |
[INFO] [stderr] 5 |     static ref CURRENT_CONTEXT: ActorContext = { ActorContext::new() };
[INFO] [stderr]   |                                                ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> src/actor/scheduler/mod.rs:130:21
[INFO] [stderr]     |
[INFO] [stderr] 130 |         if let Some(a) = self.actors.remove(&msg.0) {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/worker.rs:124:25
[INFO] [stderr]     |
[INFO] [stderr] 124 |                     Err(e) => error!(target: "Worker", "error sending msg"),
[INFO] [stderr]     |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ctx`
[INFO] [stderr]    --> src/worker.rs:108:59
[INFO] [stderr]     |
[INFO] [stderr] 108 |     async fn handle(&mut self, message: WorkerMessage<M>, ctx: &mut ActorHandlerContext) {
[INFO] [stderr]     |                                                           ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/worker.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         for i in 0..count {
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> src/actor/scheduler/mod.rs:130:21
[INFO] [stderr]     |
[INFO] [stderr] 130 |         if let Some(a) = self.actors.remove(&msg.0) {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]    --> src/worker.rs:124:25
[INFO] [stderr]     |
[INFO] [stderr] 124 |                     Err(e) => error!(target: "Worker", "error sending msg"),
[INFO] [stderr]     |                         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ctx`
[INFO] [stderr]    --> src/worker.rs:108:59
[INFO] [stderr]     |
[INFO] [stderr] 108 |     async fn handle(&mut self, message: WorkerMessage<M>, ctx: &mut ActorHandlerContext) {
[INFO] [stderr]     |                                                           ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/worker.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         for i in 0..count {
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `state`
[INFO] [stderr]   --> src/worker.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     state: W,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `state`
[INFO] [stderr]   --> src/worker.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     state: W,
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `message`
[INFO] [stderr]   --> tests/test_worker.rs:22:32
[INFO] [stderr]    |
[INFO] [stderr] 22 |     async fn handle(&mut self, message: HeavyTask, ctx: &mut ActorHandlerContext) -> &'static str {
[INFO] [stderr]    |                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ctx`
[INFO] [stderr]   --> tests/test_worker.rs:22:52
[INFO] [stderr]    |
[INFO] [stderr] 22 |     async fn handle(&mut self, message: HeavyTask, ctx: &mut ActorHandlerContext) -> &'static str {
[INFO] [stderr]    |                                                    ^^^ help: if this is intentional, prefix it with an underscore: `_ctx`
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ActorRef`, `new_actor`
[INFO] [stderr]  --> tests/util/mod.rs:4:24
[INFO] [stderr]   |
[INFO] [stderr] 4 | use coerce_rt::actor::{new_actor, Actor, ActorRef};
[INFO] [stderr]   |                        ^^^^^^^^^         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ActorRef`, `new_actor`
[INFO] [stderr]  --> tests/util/mod.rs:4:24
[INFO] [stderr]   |
[INFO] [stderr] 4 | use coerce_rt::actor::{new_actor, Actor, ActorRef};
[INFO] [stderr]   |                        ^^^^^^^^^         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ActorRef`, `new_actor`
[INFO] [stderr]  --> tests/util/mod.rs:4:24
[INFO] [stderr]   |
[INFO] [stderr] 4 | use coerce_rt::actor::{new_actor, Actor, ActorRef};
[INFO] [stderr]   |                        ^^^^^^^^^         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stop`
[INFO] [stderr]   --> tests/test_context.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |     let stop = actor_ref.stop().await;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_stop`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/test_context.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     let mut actor = ctx.get_tracked_actor::<TestActor>(actor_ref.id).await;
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ActorRef`, `new_actor`
[INFO] [stderr]  --> tests/util/mod.rs:4:24
[INFO] [stderr]   |
[INFO] [stderr] 4 | use coerce_rt::actor::{new_actor, Actor, ActorRef};
[INFO] [stderr]   |                        ^^^^^^^^^         ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> tests/test_message.rs:87:5
[INFO] [stderr]    |
[INFO] [stderr] 87 | /     actor_ref
[INFO] [stderr] 88 | |         .exec(|mut actor| {
[INFO] [stderr] 89 | |             actor.status = Some(TestActorStatus::Active);
[INFO] [stderr] 90 | |         })
[INFO] [stderr] 91 | |         .await;
[INFO] [stderr]    | |_______________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> tests/test_lifecycle.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     actor_ref.stop().await;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.17s
[INFO] running `"docker" "inspect" "29a495b55666ade1215c7f13721f1db891f3a4ac7e88728448285877b8f44518"`
[INFO] running `"docker" "rm" "-f" "29a495b55666ade1215c7f13721f1db891f3a4ac7e88728448285877b8f44518"`
[INFO] [stdout] 29a495b55666ade1215c7f13721f1db891f3a4ac7e88728448285877b8f44518
