[INFO] fetching crate metrix 0.13.6...
[INFO] checking metrix-0.13.6 against try#8a749131e7beb72f6edacefd2bdcbed3d67b2112 for pr-72331
[INFO] extracting crate metrix 0.13.6 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate metrix 0.13.6 on toolchain 8a749131e7beb72f6edacefd2bdcbed3d67b2112
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate metrix 0.13.6
[INFO] finished tweaking crates.io crate metrix 0.13.6
[INFO] tweaked toml for crates.io crate metrix 0.13.6 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate metrix 0.13.6 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+8a749131e7beb72f6edacefd2bdcbed3d67b2112" "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] 39783c62cf19f5f8f108e728bf08fc7b6e6c751afef6c9de464bdc7f6ff86e2f
[INFO] running `"docker" "start" "-a" "39783c62cf19f5f8f108e728bf08fc7b6e6c751afef6c9de464bdc7f6ff86e2f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-channel v0.4.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking exponential-decay-histogram v0.1.5
[INFO] [stderr]     Checking metrix v0.13.6 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Arc`
[INFO] [stderr]   --> src/instruments/fundamentals/metrics_meter.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     Arc,
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_at_mut`
[INFO] [stderr]   --> src/instruments/fundamentals/buckets.rs:55:12
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn get_at_mut(&mut self, for_when: Instant) -> Option<&mut T> {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `offset`
[INFO] [stderr]   --> src/instruments/fundamentals/clock.rs:34:16
[INFO] [stderr]    |
[INFO] [stderr] 34 |         pub fn offset(&self) -> Duration {
[INFO] [stderr]    |                ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `reference`
[INFO] [stderr]   --> src/instruments/fundamentals/clock.rs:38:16
[INFO] [stderr]    |
[INFO] [stderr] 38 |         pub fn reference(&self) -> Instant {
[INFO] [stderr]    |                ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_offset`
[INFO] [stderr]   --> src/instruments/fundamentals/clock.rs:42:16
[INFO] [stderr]    |
[INFO] [stderr] 42 |         pub fn set_offset(&self, offset: Duration) {
[INFO] [stderr]    |                ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `reset`
[INFO] [stderr]   --> src/instruments/fundamentals/clock.rs:46:16
[INFO] [stderr]    |
[INFO] [stderr] 46 |         pub fn reset(&self) {
[INFO] [stderr]    |                ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.81s
[INFO] running `"docker" "inspect" "39783c62cf19f5f8f108e728bf08fc7b6e6c751afef6c9de464bdc7f6ff86e2f"`
[INFO] running `"docker" "rm" "-f" "39783c62cf19f5f8f108e728bf08fc7b6e6c751afef6c9de464bdc7f6ff86e2f"`
[INFO] [stdout] 39783c62cf19f5f8f108e728bf08fc7b6e6c751afef6c9de464bdc7f6ff86e2f