[INFO] fetching crate rust-hashcash 0.3.1...
[INFO] checking rust-hashcash-0.3.1 against master#7f940ef5d91b53e889f111f27e00849f2f5ae4a2 for pr-72493
[INFO] extracting crate rust-hashcash 0.3.1 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate rust-hashcash 0.3.1 on toolchain 7f940ef5d91b53e889f111f27e00849f2f5ae4a2
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7f940ef5d91b53e889f111f27e00849f2f5ae4a2" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rust-hashcash 0.3.1
[INFO] finished tweaking crates.io crate rust-hashcash 0.3.1
[INFO] tweaked toml for crates.io crate rust-hashcash 0.3.1 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate rust-hashcash 0.3.1 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7f940ef5d91b53e889f111f27e00849f2f5ae4a2" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+7f940ef5d91b53e889f111f27e00849f2f5ae4a2" "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] 3ad8ed5d7f6ca28c9ebe98291add26a94491f4ca57d6880bfdcaf97cdd98eafe
[INFO] running `"docker" "start" "-a" "3ad8ed5d7f6ca28c9ebe98291add26a94491f4ca57d6880bfdcaf97cdd98eafe"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking ppv-lite86 v0.2.7
[INFO] [stderr]     Checking keccak v0.1.0
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]     Checking simpl v0.1.0
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking sha-1 v0.8.2
[INFO] [stderr]     Checking sha3 v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rust-hashcash v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `crate::Stamp`
[INFO] [stderr]    --> src/lib.rs:281:9
[INFO] [stderr]     |
[INFO] [stderr] 281 |     use crate::Stamp;
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::check`
[INFO] [stderr]    --> src/lib.rs:282:9
[INFO] [stderr]     |
[INFO] [stderr] 282 |     use crate::check;
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.62s
[INFO] running `"docker" "inspect" "3ad8ed5d7f6ca28c9ebe98291add26a94491f4ca57d6880bfdcaf97cdd98eafe"`
[INFO] running `"docker" "rm" "-f" "3ad8ed5d7f6ca28c9ebe98291add26a94491f4ca57d6880bfdcaf97cdd98eafe"`
[INFO] [stdout] 3ad8ed5d7f6ca28c9ebe98291add26a94491f4ca57d6880bfdcaf97cdd98eafe