[INFO] fetching crate futures-rate 0.1.5...
[INFO] checking futures-rate-0.1.5 against try#353a0a223066e9f46a1d935f2271a26c3c5002bb for pr-75180
[INFO] extracting crate futures-rate 0.1.5 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate futures-rate 0.1.5 on toolchain 353a0a223066e9f46a1d935f2271a26c3c5002bb
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-rate 0.1.5
[INFO] finished tweaking crates.io crate futures-rate 0.1.5
[INFO] tweaked toml for crates.io crate futures-rate 0.1.5 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate futures-rate 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ce031c78002a2c585a9d218fe35f42fe402c3f8dd4da2ebf61a4aa0d53dae35f
[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" "ce031c78002a2c585a9d218fe35f42fe402c3f8dd4da2ebf61a4aa0d53dae35f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce031c78002a2c585a9d218fe35f42fe402c3f8dd4da2ebf61a4aa0d53dae35f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce031c78002a2c585a9d218fe35f42fe402c3f8dd4da2ebf61a4aa0d53dae35f", kill_on_drop: false }`
[INFO] [stdout] ce031c78002a2c585a9d218fe35f42fe402c3f8dd4da2ebf61a4aa0d53dae35f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+353a0a223066e9f46a1d935f2271a26c3c5002bb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 102eca1bdb1e2dcc99067443a510d9faa5da38b114a656bf6ab695d5dfd07d61
[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" "102eca1bdb1e2dcc99067443a510d9faa5da38b114a656bf6ab695d5dfd07d61", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking crossbeam-queue v0.2.0
[INFO] [stderr]     Checking futures-rate v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/gatekeeper.rs:104:13
[INFO] [stdout]     |
[INFO] [stdout] 104 | /             (
[INFO] [stdout] 105 | |                 async move {
[INFO] [stdout] 106 | |                     ticket.await?;
[INFO] [stdout] 107 | |                     Ok(fut.await)
[INFO] [stdout] 108 | |                 }
[INFO] [stdout] 109 | |                 //            Token {},
[INFO] [stdout] 110 | |             ),
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 104 |             
[INFO] [stdout] 105 |                 async move {
[INFO] [stdout] 106 |                     ticket.await?;
[INFO] [stdout] 107 |                     Ok(fut.await)
[INFO] [stdout] 108 |                 }
[INFO] [stdout] 109 |                 //            Token {},
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/gatekeeper.rs:104:13
[INFO] [stdout]     |
[INFO] [stdout] 104 | /             (
[INFO] [stdout] 105 | |                 async move {
[INFO] [stdout] 106 | |                     ticket.await?;
[INFO] [stdout] 107 | |                     Ok(fut.await)
[INFO] [stdout] 108 | |                 }
[INFO] [stdout] 109 | |                 //            Token {},
[INFO] [stdout] 110 | |             ),
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 104 |             
[INFO] [stdout] 105 |                 async move {
[INFO] [stdout] 106 |                     ticket.await?;
[INFO] [stdout] 107 |                     Ok(fut.await)
[INFO] [stdout] 108 |                 }
[INFO] [stdout] 109 |                 //            Token {},
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `GateKeeperConfig`, `TokenPolicy`
[INFO] [stdout]  --> examples/cooperative_mode.rs:5:32
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures_rate::{GateKeeper, GateKeeperConfig, TokenPolicy};
[INFO] [stdout]   |                                ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/cooperative_mode.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut keeper = GateKeeper::new(1);
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.42s
[INFO] running `Command { std: "docker" "inspect" "102eca1bdb1e2dcc99067443a510d9faa5da38b114a656bf6ab695d5dfd07d61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "102eca1bdb1e2dcc99067443a510d9faa5da38b114a656bf6ab695d5dfd07d61", kill_on_drop: false }`
[INFO] [stdout] 102eca1bdb1e2dcc99067443a510d9faa5da38b114a656bf6ab695d5dfd07d61