[INFO] fetching crate event-emitter-rs 0.1.4...
[INFO] checking event-emitter-rs-0.1.4 against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate event-emitter-rs 0.1.4 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate event-emitter-rs 0.1.4 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate event-emitter-rs 0.1.4
[INFO] finished tweaking crates.io crate event-emitter-rs 0.1.4
[INFO] tweaked toml for crates.io crate event-emitter-rs 0.1.4 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 97604ae7a3950b52cd85477c82c62cbaabcde25693837e9f21e01bdf92730d37
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "97604ae7a3950b52cd85477c82c62cbaabcde25693837e9f21e01bdf92730d37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97604ae7a3950b52cd85477c82c62cbaabcde25693837e9f21e01bdf92730d37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97604ae7a3950b52cd85477c82c62cbaabcde25693837e9f21e01bdf92730d37", kill_on_drop: false }`
[INFO] [stdout] 97604ae7a3950b52cd85477c82c62cbaabcde25693837e9f21e01bdf92730d37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e69b56035f046576249fd0ca67dd0c2fb553e12fc1e24429a390a9ad12e9d39c
[INFO] running `Command { std: "docker" "start" "-a" "e69b56035f046576249fd0ca67dd0c2fb553e12fc1e24429a390a9ad12e9d39c", kill_on_drop: false }`
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking event-emitter-rs v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]  --> src/tests.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::EventEmitter`
[INFO] [stdout]  --> src/tests.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::EventEmitter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]  --> src/tests.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde::{Deserialize, Serialize};
[INFO] [stdout]   |             ^^^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`
[INFO] [stdout]  --> src/tests.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::sync::{Mutex, Arc};
[INFO] [stdout]   |                 ^^^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]    --> src/lib.rs:331:32
[INFO] [stdout]     |
[INFO] [stdout] 331 |     pub fn sync_emit<T>(&self, event: &str, value: T) 
[INFO] [stdout]     |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/lib.rs:331:45
[INFO] [stdout]     |
[INFO] [stdout] 331 |     pub fn sync_emit<T>(&self, event: &str, value: T) 
[INFO] [stdout]     |                                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `event`
[INFO] [stdout]    --> src/lib.rs:331:32
[INFO] [stdout]     |
[INFO] [stdout] 331 |     pub fn sync_emit<T>(&self, event: &str, value: T) 
[INFO] [stdout]     |                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_event`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/lib.rs:331:45
[INFO] [stdout]     |
[INFO] [stdout] 331 |     pub fn sync_emit<T>(&self, event: &str, value: T) 
[INFO] [stdout]     |                                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/tests.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut counter: Arc<Mutex<u32>> = Arc::new(Mutex::new(5));
[INFO] [stdout]   |         ----^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tests.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mut container: Arc<Mutex<Container>> = Arc::new(Mutex::new(Container { list: Vec::new() }));
[INFO] [stdout]    |         ----^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/tests.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let mut counter: Arc<Mutex<u32>> = Arc::new(Mutex::new(5));
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/tests.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         callback.join();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/tests.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |         callback.join();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.00s
[INFO] running `Command { std: "docker" "inspect" "e69b56035f046576249fd0ca67dd0c2fb553e12fc1e24429a390a9ad12e9d39c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e69b56035f046576249fd0ca67dd0c2fb553e12fc1e24429a390a9ad12e9d39c", kill_on_drop: false }`
[INFO] [stdout] e69b56035f046576249fd0ca67dd0c2fb553e12fc1e24429a390a9ad12e9d39c