[INFO] fetching crate mutable 0.2.8...
[INFO] checking mutable-0.2.8 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate mutable 0.2.8 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate mutable 0.2.8 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 mutable 0.2.8
[INFO] finished tweaking crates.io crate mutable 0.2.8
[INFO] tweaked toml for crates.io crate mutable 0.2.8 written to /workspace/builds/worker-2-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 11 packages to latest compatible versions
[INFO] [stderr]       Adding convert_case v0.5.0 (latest: v0.6.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.76)
[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 mutable_derive v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] bf281e18c268589af7dc8909bc78927df59e699ac29b91142e80b925316e4bf0
[INFO] running `Command { std: "docker" "start" "-a" "bf281e18c268589af7dc8909bc78927df59e699ac29b91142e80b925316e4bf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf281e18c268589af7dc8909bc78927df59e699ac29b91142e80b925316e4bf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf281e18c268589af7dc8909bc78927df59e699ac29b91142e80b925316e4bf0", kill_on_drop: false }`
[INFO] [stdout] bf281e18c268589af7dc8909bc78927df59e699ac29b91142e80b925316e4bf0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 26052d6f0072b52ac0f3433c74943b2c4fd8ac329bbf171e663f88eb8f8d89c2
[INFO] running `Command { std: "docker" "start" "-a" "26052d6f0072b52ac0f3433c74943b2c4fd8ac329bbf171e663f88eb8f8d89c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling convert_case v0.5.0
[INFO] [stderr]     Checking uuid v1.10.0
[INFO] [stderr]    Compiling mutable_derive v0.3.3
[INFO] [stderr]     Checking mutable v0.2.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `softeq::*`
[INFO] [stdout]  --> src/default_impl/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use softeq::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `softeq::*`
[INFO] [stdout]  --> src/default_impl/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use softeq::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.25s
[INFO] running `Command { std: "docker" "inspect" "26052d6f0072b52ac0f3433c74943b2c4fd8ac329bbf171e663f88eb8f8d89c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26052d6f0072b52ac0f3433c74943b2c4fd8ac329bbf171e663f88eb8f8d89c2", kill_on_drop: false }`
[INFO] [stdout] 26052d6f0072b52ac0f3433c74943b2c4fd8ac329bbf171e663f88eb8f8d89c2