[INFO] fetching crate lubeck 0.0.0-prealpha.5-abandoned...
[INFO] checking lubeck-0.0.0-prealpha.5-abandoned against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate lubeck 0.0.0-prealpha.5-abandoned into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate lubeck 0.0.0-prealpha.5-abandoned 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 lubeck 0.0.0-prealpha.5-abandoned
[INFO] finished tweaking crates.io crate lubeck 0.0.0-prealpha.5-abandoned
[INFO] tweaked toml for crates.io crate lubeck 0.0.0-prealpha.5-abandoned written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate lubeck 0.0.0-prealpha.5-abandoned 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fastrand v1.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 8099ae22f8439ee2f3ad2287c64668aa9807ab0b129c2a5c647edbb944b287bc
[INFO] running `Command { std: "docker" "start" "-a" "8099ae22f8439ee2f3ad2287c64668aa9807ab0b129c2a5c647edbb944b287bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8099ae22f8439ee2f3ad2287c64668aa9807ab0b129c2a5c647edbb944b287bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8099ae22f8439ee2f3ad2287c64668aa9807ab0b129c2a5c647edbb944b287bc", kill_on_drop: false }`
[INFO] [stdout] 8099ae22f8439ee2f3ad2287c64668aa9807ab0b129c2a5c647edbb944b287bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e4a13ca77f50409a8438f99c113b47b3a6aae4d5d44248c5dda2dd3d67d881b3
[INFO] running `Command { std: "docker" "start" "-a" "e4a13ca77f50409a8438f99c113b47b3a6aae4d5d44248c5dda2dd3d67d881b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking quick-error v2.0.1
[INFO] [stderr]     Checking lubeck v0.0.0-prealpha.5-abandoned (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/common/transformer/optiont/generic_try.rs:99:24
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn app<F, B>(self, f: Self::Type<F>) -> Self::Type<B>
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking proptest v1.0.0
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/common/transformer/optiont/generic_try.rs:99:24
[INFO] [stdout]    |
[INFO] [stdout] 99 |     fn app<F, B>(self, f: Self::Type<F>) -> Self::Type<B>
[INFO] [stdout]    |                        ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.05s
[INFO] running `Command { std: "docker" "inspect" "e4a13ca77f50409a8438f99c113b47b3a6aae4d5d44248c5dda2dd3d67d881b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4a13ca77f50409a8438f99c113b47b3a6aae4d5d44248c5dda2dd3d67d881b3", kill_on_drop: false }`
[INFO] [stdout] e4a13ca77f50409a8438f99c113b47b3a6aae4d5d44248c5dda2dd3d67d881b3