[INFO] fetching crate legal_chess 0.4.42...
[INFO] checking legal_chess-0.4.42 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate legal_chess 0.4.42 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate legal_chess 0.4.42 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate legal_chess 0.4.42
[INFO] finished tweaking crates.io crate legal_chess 0.4.42
[INFO] tweaked toml for crates.io crate legal_chess 0.4.42 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d7558d67cb7fab049a7a0ce6c866a21e1c66b637b73eb7703ae914cfb14cf49
[INFO] running `Command { std: "docker" "start" "-a" "8d7558d67cb7fab049a7a0ce6c866a21e1c66b637b73eb7703ae914cfb14cf49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d7558d67cb7fab049a7a0ce6c866a21e1c66b637b73eb7703ae914cfb14cf49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d7558d67cb7fab049a7a0ce6c866a21e1c66b637b73eb7703ae914cfb14cf49", kill_on_drop: false }`
[INFO] [stdout] 8d7558d67cb7fab049a7a0ce6c866a21e1c66b637b73eb7703ae914cfb14cf49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ce2afc8506fa8f5b536af896fecffc0706a08a4ab27e9f8e6442e48f925cbb7
[INFO] running `Command { std: "docker" "start" "-a" "5ce2afc8506fa8f5b536af896fecffc0706a08a4ab27e9f8e6442e48f925cbb7", kill_on_drop: false }`
[INFO] [stderr]     Checking legal_chess v0.4.42 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `piece` is imported redundantly
[INFO] [stdout]   --> src/attack.rs:42:38
[INFO] [stdout]    |
[INFO] [stdout] 42 |     use super::super::pieces::{pawn, piece, position};
[INFO] [stdout]    |                                      ^^^^^
[INFO] [stdout] 43 |     use super::*;
[INFO] [stdout]    |         -------- the item `piece` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `position` is imported redundantly
[INFO] [stdout]   --> src/attack.rs:42:45
[INFO] [stdout]    |
[INFO] [stdout] 42 |     use super::super::pieces::{pawn, piece, position};
[INFO] [stdout]    |                                             ^^^^^^^^
[INFO] [stdout] 43 |     use super::*;
[INFO] [stdout]    |         -------- the item `position` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Piece` is imported redundantly
[INFO] [stdout]    --> src/pieces/king.rs:163:9
[INFO] [stdout]     |
[INFO] [stdout] 163 |     use super::piece::Piece;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 164 |     use super::*;
[INFO] [stdout]     |         -------- the item `Piece` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Piece` is imported redundantly
[INFO] [stdout]    --> src/pieces/pawn.rs:200:44
[INFO] [stdout]     |
[INFO] [stdout] 200 |     use super::super::{bishop, king, pawn, piece::Piece, queen, rook};
[INFO] [stdout]     |                                            ^^^^^^^^^^^^
[INFO] [stdout] 201 |     use super::*;
[INFO] [stdout]     |         -------- the item `Piece` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `bishop` is imported redundantly
[INFO] [stdout]    --> src/pieces/piece.rs:183:24
[INFO] [stdout]     |
[INFO] [stdout] 183 |     use super::super::{bishop, king, knight, pawn, queen};
[INFO] [stdout]     |                        ^^^^^^
[INFO] [stdout] 184 |     use super::*;
[INFO] [stdout]     |         -------- the item `bishop` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `king` is imported redundantly
[INFO] [stdout]    --> src/pieces/piece.rs:183:32
[INFO] [stdout]     |
[INFO] [stdout] 183 |     use super::super::{bishop, king, knight, pawn, queen};
[INFO] [stdout]     |                                ^^^^
[INFO] [stdout] 184 |     use super::*;
[INFO] [stdout]     |         -------- the item `king` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `knight` is imported redundantly
[INFO] [stdout]    --> src/pieces/piece.rs:183:38
[INFO] [stdout]     |
[INFO] [stdout] 183 |     use super::super::{bishop, king, knight, pawn, queen};
[INFO] [stdout]     |                                      ^^^^^^
[INFO] [stdout] 184 |     use super::*;
[INFO] [stdout]     |         -------- the item `knight` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `pawn` is imported redundantly
[INFO] [stdout]    --> src/pieces/piece.rs:183:46
[INFO] [stdout]     |
[INFO] [stdout] 183 |     use super::super::{bishop, king, knight, pawn, queen};
[INFO] [stdout]     |                                              ^^^^
[INFO] [stdout] 184 |     use super::*;
[INFO] [stdout]     |         -------- the item `pawn` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `queen` is imported redundantly
[INFO] [stdout]    --> src/pieces/piece.rs:183:52
[INFO] [stdout]     |
[INFO] [stdout] 183 |     use super::super::{bishop, king, knight, pawn, queen};
[INFO] [stdout]     |                                                    ^^^^^
[INFO] [stdout] 184 |     use super::*;
[INFO] [stdout]     |         -------- the item `queen` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "5ce2afc8506fa8f5b536af896fecffc0706a08a4ab27e9f8e6442e48f925cbb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ce2afc8506fa8f5b536af896fecffc0706a08a4ab27e9f8e6442e48f925cbb7", kill_on_drop: false }`
[INFO] [stdout] 5ce2afc8506fa8f5b536af896fecffc0706a08a4ab27e9f8e6442e48f925cbb7