[INFO] crate flume 0.7.1 is already in cache
[INFO] checking flume-0.7.1 against master#6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257 for pr-70872
[INFO] extracting crate flume 0.7.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate flume 0.7.1 on toolchain 6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate flume 0.7.1
[INFO] finished tweaking crates.io crate flume 0.7.1
[INFO] tweaked toml for crates.io crate flume 0.7.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate flume 0.7.1 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c21a0244ccab50681a3a594b4f0db106ae69e5b2935739496372fab4e977c059
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "c21a0244ccab50681a3a594b4f0db106ae69e5b2935739496372fab4e977c059"`
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking regex v1.3.5
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking async-task v1.3.1
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking bstr v0.2.11
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tinytemplate v1.0.3
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking flume v0.7.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `guard`
[INFO] [stderr]   --> src/lib.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 |         let guard = self.trigger.wait(guard).unwrap();
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_guard`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `guard`
[INFO] [stderr]   --> src/lib.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |         let guard = self.trigger.wait_while(guard, cond).unwrap();
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_guard`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `guard`
[INFO] [stderr]    --> src/lib.rs:114:14
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let (guard, timeout) = self.trigger.wait_timeout(guard, dur).unwrap();
[INFO] [stderr]     |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_guard`
[INFO] [stderr] 
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking async-std v1.5.0
[INFO] [stderr]     Checking criterion v0.3.1
[INFO] [stderr] warning: unused variable: `guard`
[INFO] [stderr]   --> src/lib.rs:88:13
[INFO] [stderr]    |
[INFO] [stderr] 88 |         let guard = self.trigger.wait(guard).unwrap();
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_guard`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `guard`
[INFO] [stderr]   --> src/lib.rs:97:13
[INFO] [stderr]    |
[INFO] [stderr] 97 |         let guard = self.trigger.wait_while(guard, cond).unwrap();
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_guard`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `guard`
[INFO] [stderr]    --> src/lib.rs:114:14
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let (guard, timeout) = self.trigger.wait_timeout(guard, dur).unwrap();
[INFO] [stderr]     |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_guard`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 47.83s
[INFO] running `"docker" "inspect" "c21a0244ccab50681a3a594b4f0db106ae69e5b2935739496372fab4e977c059"`
[INFO] running `"docker" "rm" "-f" "c21a0244ccab50681a3a594b4f0db106ae69e5b2935739496372fab4e977c059"`
[INFO] [stdout] c21a0244ccab50681a3a594b4f0db106ae69e5b2935739496372fab4e977c059