[INFO] crate ring-channel 0.8.1 is already in cache
[INFO] checking ring-channel-0.8.1 against try#d7b51666469c792a8a3f40849607739bae1e705e for pr-71665
[INFO] extracting crate ring-channel 0.8.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate ring-channel 0.8.1 on toolchain d7b51666469c792a8a3f40849607739bae1e705e
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ring-channel 0.8.1
[INFO] finished tweaking crates.io crate ring-channel 0.8.1
[INFO] tweaked toml for crates.io crate ring-channel 0.8.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "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" "+d7b51666469c792a8a3f40849607739bae1e705e" "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] 85312902eb3a96c7b7400a7b1d6c3b671b86c69241cc431fd2818dcd2d6d1bcd
[INFO] running `"docker" "start" "-a" "85312902eb3a96c7b7400a7b1d6c3b671b86c69241cc431fd2818dcd2d6d1bcd"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking bit-vec v0.6.2
[INFO] [stderr]     Checking downcast v0.10.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]    Compiling syn v1.0.19
[INFO] [stderr]     Checking float-cmp v0.6.0
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking predicates v1.0.4
[INFO] [stderr]     Checking rusty-fork v0.2.2
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking proptest v0.9.6
[INFO] [stderr]    Compiling pin-project-internal v0.4.14
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling serde_derive v1.0.109
[INFO] [stderr]    Compiling mockall_derive v0.6.0
[INFO] [stderr]    Compiling derivative v1.0.4
[INFO] [stderr]    Compiling proptest-derive v0.1.2
[INFO] [stderr]     Checking pin-project v0.4.14
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking mockall v0.6.0
[INFO] [stderr]     Checking criterion v0.3.2
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking ring-channel v0.8.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/waitlist.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 | /     mock! {
[INFO] [stderr] 61 | |         Waker {}
[INFO] [stderr] 62 | |         trait Wake {
[INFO] [stderr] 63 | |             fn wake(self);
[INFO] [stderr] 64 | |             fn will_wake(&self, other: &MockWaker) -> bool;
[INFO] [stderr] 65 | |         }
[INFO] [stderr] 66 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/waitlist.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 | /     mock! {
[INFO] [stderr] 61 | |         Waker {}
[INFO] [stderr] 62 | |         trait Wake {
[INFO] [stderr] 63 | |             fn wake(self);
[INFO] [stderr] 64 | |             fn will_wake(&self, other: &MockWaker) -> bool;
[INFO] [stderr] 65 | |         }
[INFO] [stderr] 66 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 03s
[INFO] running `"docker" "inspect" "85312902eb3a96c7b7400a7b1d6c3b671b86c69241cc431fd2818dcd2d6d1bcd"`
[INFO] running `"docker" "rm" "-f" "85312902eb3a96c7b7400a7b1d6c3b671b86c69241cc431fd2818dcd2d6d1bcd"`
[INFO] [stdout] 85312902eb3a96c7b7400a7b1d6c3b671b86c69241cc431fd2818dcd2d6d1bcd