[INFO] fetching crate fuzzyhash 0.2.1...
[INFO] checking fuzzyhash-0.2.1 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate fuzzyhash 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate fuzzyhash 0.2.1 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fuzzyhash 0.2.1
[INFO] finished tweaking crates.io crate fuzzyhash 0.2.1
[INFO] tweaked toml for crates.io crate fuzzyhash 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate fuzzyhash 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2a84763771f4ebb03b2c6bf9d57f4c41965582e7442ea77e3b65f7ccbd97f425
[INFO] running `Command { std: "docker" "start" "-a" "2a84763771f4ebb03b2c6bf9d57f4c41965582e7442ea77e3b65f7ccbd97f425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a84763771f4ebb03b2c6bf9d57f4c41965582e7442ea77e3b65f7ccbd97f425", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a84763771f4ebb03b2c6bf9d57f4c41965582e7442ea77e3b65f7ccbd97f425", kill_on_drop: false }`
[INFO] [stdout] 2a84763771f4ebb03b2c6bf9d57f4c41965582e7442ea77e3b65f7ccbd97f425
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 482de5503eb9ac1a640618b9a642cff6149d8ca9c377d5db751bb0ce515eace7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "482de5503eb9ac1a640618b9a642cff6149d8ca9c377d5db751bb0ce515eace7", kill_on_drop: false }`
[INFO] [stderr]     Checking fuzzyhash v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> benches/compare_strings1.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         FuzzyHash::compare(&string1, &string2);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "482de5503eb9ac1a640618b9a642cff6149d8ca9c377d5db751bb0ce515eace7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "482de5503eb9ac1a640618b9a642cff6149d8ca9c377d5db751bb0ce515eace7", kill_on_drop: false }`
[INFO] [stdout] 482de5503eb9ac1a640618b9a642cff6149d8ca9c377d5db751bb0ce515eace7