[INFO] fetching crate cardinality-estimator-safe 4.0.1...
[INFO] checking cardinality-estimator-safe-4.0.1 against try#1f5783cbeb5da8b38566d718631d016891e9c912 for pr-142704
[INFO] extracting crate cardinality-estimator-safe 4.0.1 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate cardinality-estimator-safe 4.0.1 on toolchain 1f5783cbeb5da8b38566d718631d016891e9c912
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f5783cbeb5da8b38566d718631d016891e9c912" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cardinality-estimator-safe 4.0.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate cardinality-estimator-safe 4.0.1
[INFO] tweaked toml for crates.io crate cardinality-estimator-safe 4.0.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate cardinality-estimator-safe 4.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f5783cbeb5da8b38566d718631d016891e9c912" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] ee1a836c7c1441115400f2a475bc99087b4f2670bf346704ac180ae1792b22c8
[INFO] running `Command { std: "docker" "start" "-a" "ee1a836c7c1441115400f2a475bc99087b4f2670bf346704ac180ae1792b22c8", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+1f5783cbeb5da8b38566d718631d016891e9c912" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ea553fbe18dbc2513533df7091ec3be5b45b3abf33499ba7db46ac3f0410526a
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[INFO] [stdout] warning: method `merge` is never used
[INFO] [stdout]    --> benches/cardinality_estimator.rs:116:8
[INFO] [stdout]     |
[INFO] [stdout] 112 | trait CardinalityEstimatorTrait<T: Hash + ?Sized> {
[INFO] [stdout]     |       ------------------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 116 |     fn merge(&mut self, rhs: &Self);
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
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[INFO] running `Command { std: "docker" "inspect" "ea553fbe18dbc2513533df7091ec3be5b45b3abf33499ba7db46ac3f0410526a", kill_on_drop: false }`
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[INFO] [stdout] ea553fbe18dbc2513533df7091ec3be5b45b3abf33499ba7db46ac3f0410526a
