[INFO] fetching crate mech-utilities 0.0.4...
[INFO] checking mech-utilities-0.0.4 against try#d93021f5faa26e4f9d2719e79f9974e06aa40e17 for pr-71873
[INFO] extracting crate mech-utilities 0.0.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mech-utilities 0.0.4 on toolchain d93021f5faa26e4f9d2719e79f9974e06aa40e17
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d93021f5faa26e4f9d2719e79f9974e06aa40e17" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mech-utilities 0.0.4
[INFO] finished tweaking crates.io crate mech-utilities 0.0.4
[INFO] tweaked toml for crates.io crate mech-utilities 0.0.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d93021f5faa26e4f9d2719e79f9974e06aa40e17" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d93021f5faa26e4f9d2719e79f9974e06aa40e17" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+d93021f5faa26e4f9d2719e79f9974e06aa40e17" "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] 15f88e2c93f0262d668ca71247f3b6e963c9cb17639c93987051abe26cf392bc
[INFO] running `"docker" "start" "-a" "15f88e2c93f0262d668ca71247f3b6e963c9cb17639c93987051abe26cf392bc"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling syn v1.0.22
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]     Checking ahash v0.3.5
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]     Checking mech-core v0.0.4
[INFO] [stderr]     Checking mech-utilities v0.0.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Interner`
[INFO] [stderr]  --> src/lib.rs:6:30
[INFO] [stderr]   |
[INFO] [stderr] 6 | use mech_core::{Transaction, Interner, TableId};
[INFO] [stderr]   |                              ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Interner`
[INFO] [stderr]  --> src/lib.rs:6:30
[INFO] [stderr]   |
[INFO] [stderr] 6 | use mech_core::{Transaction, Interner, TableId};
[INFO] [stderr]   |                              ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.34s
[INFO] running `"docker" "inspect" "15f88e2c93f0262d668ca71247f3b6e963c9cb17639c93987051abe26cf392bc"`
[INFO] running `"docker" "rm" "-f" "15f88e2c93f0262d668ca71247f3b6e963c9cb17639c93987051abe26cf392bc"`
[INFO] [stdout] 15f88e2c93f0262d668ca71247f3b6e963c9cb17639c93987051abe26cf392bc