[INFO] fetching crate enhance 0.0.1...
[INFO] checking enhance-0.0.1 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate enhance 0.0.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate enhance 0.0.1 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate enhance 0.0.1
[INFO] finished tweaking crates.io crate enhance 0.0.1
[INFO] tweaked toml for crates.io crate enhance 0.0.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 20 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.13.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.2+wasi-0.2.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded either v1.13.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a24c5ccaee0f56611b7cb08ec51ee6fba386da72967c33c27df4a163c47ef8b
[INFO] running `Command { std: "docker" "start" "-a" "2a24c5ccaee0f56611b7cb08ec51ee6fba386da72967c33c27df4a163c47ef8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a24c5ccaee0f56611b7cb08ec51ee6fba386da72967c33c27df4a163c47ef8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a24c5ccaee0f56611b7cb08ec51ee6fba386da72967c33c27df4a163c47ef8b", kill_on_drop: false }`
[INFO] [stdout] 2a24c5ccaee0f56611b7cb08ec51ee6fba386da72967c33c27df4a163c47ef8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 908ce05025adfc13239e6a81e4ba495080bd6350cc99b92edde18199da6d040e
[INFO] running `Command { std: "docker" "start" "-a" "908ce05025adfc13239e6a81e4ba495080bd6350cc99b92edde18199da6d040e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.76
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking enhance v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BTreeSet`
[INFO] [stdout]  --> src/basic/mod.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 |     collections::{BTreeMap, BTreeSet},
[INFO] [stdout]   |                             ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BTreeSet`
[INFO] [stdout]  --> src/basic/mod.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 |     collections::{BTreeMap, BTreeSet},
[INFO] [stdout]   |                             ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EnhanceCost` is never constructed
[INFO] [stdout]  --> src/basic/mod.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct EnhanceCost<T> {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EnhanceCost` is never constructed
[INFO] [stdout]  --> src/basic/mod.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct EnhanceCost<T> {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `total_rate` is never used
[INFO] [stdout]   --> src/basic/level/mod.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<T, R> EnhanceLevel<T, R> {
[INFO] [stdout]    | ----------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 56 |     fn total_rate(&self) -> R
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `total_rate` is never used
[INFO] [stdout]   --> src/basic/level/mod.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<T, R> EnhanceLevel<T, R> {
[INFO] [stdout]    | ----------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 56 |     fn total_rate(&self) -> R
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.24s
[INFO] running `Command { std: "docker" "inspect" "908ce05025adfc13239e6a81e4ba495080bd6350cc99b92edde18199da6d040e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "908ce05025adfc13239e6a81e4ba495080bd6350cc99b92edde18199da6d040e", kill_on_drop: false }`
[INFO] [stdout] 908ce05025adfc13239e6a81e4ba495080bd6350cc99b92edde18199da6d040e