[INFO] fetching crate barbarosa 0.2.0...
[INFO] checking barbarosa-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate barbarosa 0.2.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate barbarosa 0.2.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate barbarosa 0.2.0
[INFO] finished tweaking crates.io crate barbarosa 0.2.0
[INFO] tweaked toml for crates.io crate barbarosa 0.2.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate barbarosa 0.2.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52e036b635aba7ff25dc564a8e53ad8c0fc004724afcb456269aa9f6dee01f06
[INFO] running `Command { std: "docker" "start" "-a" "52e036b635aba7ff25dc564a8e53ad8c0fc004724afcb456269aa9f6dee01f06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52e036b635aba7ff25dc564a8e53ad8c0fc004724afcb456269aa9f6dee01f06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52e036b635aba7ff25dc564a8e53ad8c0fc004724afcb456269aa9f6dee01f06", kill_on_drop: false }`
[INFO] [stdout] 52e036b635aba7ff25dc564a8e53ad8c0fc004724afcb456269aa9f6dee01f06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 714f88a92a150d5e0a2a8279dbc41b1d3c2ee28f5bbbe6c336d1b65bc90ff82d
[INFO] running `Command { std: "docker" "start" "-a" "714f88a92a150d5e0a2a8279dbc41b1d3c2ee28f5bbbe6c336d1b65bc90ff82d", kill_on_drop: false }`
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[INFO] [stderr]    Compiling pest_derive v2.7.2
[INFO] [stderr]     Checking barbarosa v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Cube` is imported redundantly
[INFO] [stdout]   --> src/cube_n/cube3/test.rs:10:35
[INFO] [stdout]    |
[INFO] [stdout] 10 |     generic::{piece::Coordinates, Cube, Movable, Parsable},
[INFO] [stdout]    |                                   ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 | use super::*;
[INFO] [stdout]    |     -------- the item `Cube` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Movable` is imported redundantly
[INFO] [stdout]   --> src/cube_n/cube3/test.rs:10:41
[INFO] [stdout]    |
[INFO] [stdout] 10 |     generic::{piece::Coordinates, Cube, Movable, Parsable},
[INFO] [stdout]    |                                         ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 | use super::*;
[INFO] [stdout]    |     -------- the item `Movable` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CfopSolver` is never constructed
[INFO] [stdout]   --> src/cube_n/cube3/cfop/mod.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct CfopSolver {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `IntoOrientable` is never used
[INFO] [stdout]   --> src/cube_n/orientable/mod.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 | trait IntoOrientable
[INFO] [stdout]    |       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CfopSolver` is never constructed
[INFO] [stdout]   --> src/cube_n/cube3/cfop/mod.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct CfopSolver {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 43.07s
[INFO] running `Command { std: "docker" "inspect" "714f88a92a150d5e0a2a8279dbc41b1d3c2ee28f5bbbe6c336d1b65bc90ff82d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "714f88a92a150d5e0a2a8279dbc41b1d3c2ee28f5bbbe6c336d1b65bc90ff82d", kill_on_drop: false }`
[INFO] [stdout] 714f88a92a150d5e0a2a8279dbc41b1d3c2ee28f5bbbe6c336d1b65bc90ff82d