[INFO] crate io-uring 0.3.4 is already in cache
[INFO] checking io-uring-0.3.4 against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] extracting crate io-uring 0.3.4 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate io-uring 0.3.4 on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate io-uring 0.3.4
[INFO] finished tweaking crates.io crate io-uring 0.3.4
[INFO] tweaked toml for crates.io crate io-uring 0.3.4 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate io-uring 0.3.4 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3157b1d33efbc8fab8445e0f4e52268aa6d47afe35ac859f9fdb28ccfc49e6e2
[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" "3157b1d33efbc8fab8445e0f4e52268aa6d47afe35ac859f9fdb28ccfc49e6e2"`
[INFO] [stderr]    Compiling syn v1.0.15
[INFO] [stderr]    Compiling io-uring v0.3.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex-syntax v0.6.14
[INFO] [stderr]    Compiling uring-sys v1.0.0-beta
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking socket2 v0.3.11
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking regex-automata v0.1.8
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking bstr v0.2.11
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking iou v0.2.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking tinytemplate v1.0.3
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking criterion v0.3.1
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/register.rs:126:9
[INFO] [stderr]     |
[INFO] [stderr] 126 |     let mut ring = IoUring::new(256)?;
[INFO] [stderr]     |         ----^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.75s
[INFO] running `"docker" "inspect" "3157b1d33efbc8fab8445e0f4e52268aa6d47afe35ac859f9fdb28ccfc49e6e2"`
[INFO] running `"docker" "rm" "-f" "3157b1d33efbc8fab8445e0f4e52268aa6d47afe35ac859f9fdb28ccfc49e6e2"`
[INFO] [stdout] 3157b1d33efbc8fab8445e0f4e52268aa6d47afe35ac859f9fdb28ccfc49e6e2