[INFO] fetching crate async-weighted-semaphore 0.2.1...
[INFO] checking async-weighted-semaphore-0.2.1 against try#a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399 for pr-145770
[INFO] extracting crate async-weighted-semaphore 0.2.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate async-weighted-semaphore 0.2.1
[INFO] finished tweaking crates.io crate async-weighted-semaphore 0.2.1
[INFO] tweaked toml for crates.io crate async-weighted-semaphore 0.2.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate async-weighted-semaphore 0.2.1 on toolchain a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] 4f1da41c1a365714bbbfb43dfc124b0e5c620613dab90683c01af239f2562c44
[INFO] running `Command { std: "docker" "start" "-a" "4f1da41c1a365714bbbfb43dfc124b0e5c620613dab90683c01af239f2562c44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f1da41c1a365714bbbfb43dfc124b0e5c620613dab90683c01af239f2562c44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f1da41c1a365714bbbfb43dfc124b0e5c620613dab90683c01af239f2562c44", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/guard.rs:109:42
[INFO] [stdout]     |
[INFO] [stdout] 109 |                 semaphore: self.semaphore.clone(),
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Semaphore` does not implement `Clone`, so calling `clone` on `&Semaphore` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 109 -                 semaphore: self.semaphore.clone(),
[INFO] [stdout] 109 +                 semaphore: self.semaphore,
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Semaphore`, implement `Clone` for it
[INFO] [stdout]    --> src/semaphore.rs:26:1
[INFO] [stdout]     |
[INFO] [stdout] 26  + #[derive(Clone)]
[INFO] [stdout] 27  | pub struct Semaphore {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/semaphore.rs:116:20
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn acquire(&self, amount: usize) -> AcquireFuture {
[INFO] [stdout]     |                    ^^^^^                    ------------- the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn acquire(&self, amount: usize) -> AcquireFuture<'_> {
[INFO] [stdout]     |                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/semaphore.rs:144:24
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn try_acquire(&self, amount: usize) -> Result<SemaphoreGuard, TryAcquireError> {
[INFO] [stdout]     |                        ^^^^^                           -------------- the same lifetime is hidden here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn try_acquire(&self, amount: usize) -> Result<SemaphoreGuard<'_>, TryAcquireError> {
[INFO] [stdout]     |                                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] [stdout] warning: unused import: `async_std::task::spawn`
[INFO] [stdout]   --> benches/mutex.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use async_std::task::spawn;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/guard.rs:109:42
[INFO] [stdout]     |
[INFO] [stdout] 109 |                 semaphore: self.semaphore.clone(),
[INFO] [stdout]     |                                          ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Semaphore` does not implement `Clone`, so calling `clone` on `&Semaphore` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 109 -                 semaphore: self.semaphore.clone(),
[INFO] [stdout] 109 +                 semaphore: self.semaphore,
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Semaphore`, implement `Clone` for it
[INFO] [stdout]    --> src/semaphore.rs:26:1
[INFO] [stdout]     |
[INFO] [stdout] 26  + #[derive(Clone)]
[INFO] [stdout] 27  | pub struct Semaphore {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/semaphore.rs:116:20
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn acquire(&self, amount: usize) -> AcquireFuture {
[INFO] [stdout]     |                    ^^^^^                    ------------- the same lifetime is hidden here
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn acquire(&self, amount: usize) -> AcquireFuture<'_> {
[INFO] [stdout]     |                                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/semaphore.rs:144:24
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn try_acquire(&self, amount: usize) -> Result<SemaphoreGuard, TryAcquireError> {
[INFO] [stdout]     |                        ^^^^^                           -------------- the same lifetime is hidden here
[INFO] [stdout]     |                        |
[INFO] [stdout]     |                        the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 144 |     pub fn try_acquire(&self, amount: usize) -> Result<SemaphoreGuard<'_>, TryAcquireError> {
[INFO] [stdout]     |                                                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 44.31s
[INFO] running `Command { std: "docker" "inspect" "a823f81210e5bfca55d7ef1b86065f19610b442b2bca5d16548063445254647d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a823f81210e5bfca55d7ef1b86065f19610b442b2bca5d16548063445254647d", kill_on_drop: false }`
[INFO] [stdout] a823f81210e5bfca55d7ef1b86065f19610b442b2bca5d16548063445254647d
