[INFO] fetching crate owlchess 0.4.0...
[INFO] checking owlchess-0.4.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate owlchess 0.4.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate owlchess 0.4.0 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 owlchess 0.4.0
[INFO] finished tweaking crates.io crate owlchess 0.4.0
[INFO] tweaked toml for crates.io crate owlchess 0.4.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate owlchess 0.4.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded owlchess_base v0.4.0
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 696f2bd84b9cf4c08d161e6f7653b01986ba3c78582e677da80d72493cf01602
[INFO] running `Command { std: "docker" "start" "-a" "696f2bd84b9cf4c08d161e6f7653b01986ba3c78582e677da80d72493cf01602", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "696f2bd84b9cf4c08d161e6f7653b01986ba3c78582e677da80d72493cf01602", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "696f2bd84b9cf4c08d161e6f7653b01986ba3c78582e677da80d72493cf01602", kill_on_drop: false }`
[INFO] [stdout] 696f2bd84b9cf4c08d161e6f7653b01986ba3c78582e677da80d72493cf01602
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40ac0846393eb79fd774e160ff5849b97f9a2799ed73081501cd6f5b487f056d
[INFO] running `Command { std: "docker" "start" "-a" "40ac0846393eb79fd774e160ff5849b97f9a2799ed73081501cd6f5b487f056d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling thiserror v1.0.44
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling serde v1.0.183
[INFO] [stderr]    Compiling serde_derive v1.0.183
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling serde_json v1.0.104
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]    Compiling rustix v0.38.8
[INFO] [stderr]     Checking ciborium-io v0.2.1
[INFO] [stderr]    Compiling quote v1.0.32
[INFO] [stderr]     Checking regex-syntax v0.7.4
[INFO] [stderr]     Checking clap_lex v0.5.0
[INFO] [stderr]     Checking anstyle v1.0.1
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[INFO] [stderr]    Compiling syn v2.0.28
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[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling thiserror-impl v1.0.44
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stderr]    Compiling owlchess_base v0.4.0
[INFO] [stderr]    Compiling owlchess v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `DrawReason` is imported redundantly
[INFO] [stdout]     --> src/board.rs:1037:24
[INFO] [stdout]      |
[INFO] [stdout] 1036 |     use super::*;
[INFO] [stdout]      |         -------- the item `DrawReason` is already imported here
[INFO] [stdout] 1037 |     use crate::types::{DrawReason, Outcome, WinReason};
[INFO] [stdout]      |                        ^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Outcome` is imported redundantly
[INFO] [stdout]     --> src/board.rs:1037:36
[INFO] [stdout]      |
[INFO] [stdout] 1036 |     use super::*;
[INFO] [stdout]      |         -------- the item `Outcome` is already imported here
[INFO] [stdout] 1037 |     use crate::types::{DrawReason, Outcome, WinReason};
[INFO] [stdout]      |                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `WinReason` is imported redundantly
[INFO] [stdout]     --> src/board.rs:1037:45
[INFO] [stdout]      |
[INFO] [stdout] 1036 |     use super::*;
[INFO] [stdout]      |         -------- the item `WinReason` is already imported here
[INFO] [stdout] 1037 |     use crate::types::{DrawReason, Outcome, WinReason};
[INFO] [stdout]      |                                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Board` is imported redundantly
[INFO] [stdout]    --> src/chain.rs:724:9
[INFO] [stdout]     |
[INFO] [stdout] 723 |     use super::*;
[INFO] [stdout]     |         -------- the item `Board` is already imported here
[INFO] [stdout] 724 |     use crate::board::Board;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `make` is imported redundantly
[INFO] [stdout]    --> src/chain.rs:725:9
[INFO] [stdout]     |
[INFO] [stdout] 723 |     use super::*;
[INFO] [stdout]     |         -------- the item `make` is already imported here
[INFO] [stdout] 724 |     use crate::board::Board;
[INFO] [stdout] 725 |     use crate::moves::make;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DrawReason` is imported redundantly
[INFO] [stdout]    --> src/chain.rs:726:24
[INFO] [stdout]     |
[INFO] [stdout] 723 |     use super::*;
[INFO] [stdout]     |         -------- the item `DrawReason` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 726 |     use crate::types::{DrawReason, Outcome, OutcomeFilter, WinReason};
[INFO] [stdout]     |                        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Outcome` is imported redundantly
[INFO] [stdout]    --> src/chain.rs:726:36
[INFO] [stdout]     |
[INFO] [stdout] 723 |     use super::*;
[INFO] [stdout]     |         -------- the item `Outcome` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 726 |     use crate::types::{DrawReason, Outcome, OutcomeFilter, WinReason};
[INFO] [stdout]     |                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `OutcomeFilter` is imported redundantly
[INFO] [stdout]    --> src/chain.rs:726:45
[INFO] [stdout]     |
[INFO] [stdout] 723 |     use super::*;
[INFO] [stdout]     |         -------- the item `OutcomeFilter` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 726 |     use crate::types::{DrawReason, Outcome, OutcomeFilter, WinReason};
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Bitboard` is imported redundantly
[INFO] [stdout]    --> src/movegen.rs:743:9
[INFO] [stdout]     |
[INFO] [stdout] 742 |     use super::*;
[INFO] [stdout]     |         -------- the item `Bitboard` is already imported here
[INFO] [stdout] 743 |     use crate::bitboard::Bitboard;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Color` is imported redundantly
[INFO] [stdout]    --> src/movegen.rs:744:24
[INFO] [stdout]     |
[INFO] [stdout] 742 |     use super::*;
[INFO] [stdout]     |         -------- the item `Color` is already imported here
[INFO] [stdout] 743 |     use crate::bitboard::Bitboard;
[INFO] [stdout] 744 |     use crate::types::{Color, File, Rank};
[INFO] [stdout]     |                        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]    --> src/movegen.rs:744:31
[INFO] [stdout]     |
[INFO] [stdout] 742 |     use super::*;
[INFO] [stdout]     |         -------- the item `File` is already imported here
[INFO] [stdout] 743 |     use crate::bitboard::Bitboard;
[INFO] [stdout] 744 |     use crate::types::{Color, File, Rank};
[INFO] [stdout]     |                               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Board` is imported redundantly
[INFO] [stdout]    --> src/movegen.rs:745:9
[INFO] [stdout]     |
[INFO] [stdout] 742 |     use super::*;
[INFO] [stdout]     |         -------- the item `Board` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 745 |     use crate::Board;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Board` is imported redundantly
[INFO] [stdout]    --> src/moves/base.rs:934:9
[INFO] [stdout]     |
[INFO] [stdout] 933 |     use super::*;
[INFO] [stdout]     |         -------- the item `Board` is already imported here
[INFO] [stdout] 934 |     use crate::board::Board;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Board` is imported redundantly
[INFO] [stdout]    --> src/moves/san.rs:739:9
[INFO] [stdout]     |
[INFO] [stdout] 738 |     use super::*;
[INFO] [stdout]     |         -------- the item `Board` is already imported here
[INFO] [stdout] 739 |     use crate::board::Board;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `base` is imported redundantly
[INFO] [stdout]    --> src/moves/san.rs:740:24
[INFO] [stdout]     |
[INFO] [stdout] 738 |     use super::*;
[INFO] [stdout]     |         -------- the item `base` is already imported here
[INFO] [stdout] 739 |     use crate::board::Board;
[INFO] [stdout] 740 |     use crate::moves::{base, ValidateError};
[INFO] [stdout]     |                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ValidateError` is imported redundantly
[INFO] [stdout]    --> src/moves/san.rs:740:30
[INFO] [stdout]     |
[INFO] [stdout] 738 |     use super::*;
[INFO] [stdout]     |         -------- the item `ValidateError` is already imported here
[INFO] [stdout] 739 |     use crate::board::Board;
[INFO] [stdout] 740 |     use crate::moves::{base, ValidateError};
[INFO] [stdout]     |                              ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Board` is imported redundantly
[INFO] [stdout]    --> src/moves/uci.rs:191:9
[INFO] [stdout]     |
[INFO] [stdout] 190 |     use super::*;
[INFO] [stdout]     |         -------- the item `Board` is already imported here
[INFO] [stdout] 191 |     use crate::board::Board;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Color` is imported redundantly
[INFO] [stdout]    --> src/moves/uci.rs:192:30
[INFO] [stdout]     |
[INFO] [stdout] 190 |     use super::*;
[INFO] [stdout]     |         -------- the item `Color` is already imported here
[INFO] [stdout] 191 |     use crate::board::Board;
[INFO] [stdout] 192 |     use crate::types::{Cell, Color, Coord, File, Rank};
[INFO] [stdout]     |                              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Coord` is imported redundantly
[INFO] [stdout]    --> src/moves/uci.rs:192:37
[INFO] [stdout]     |
[INFO] [stdout] 190 |     use super::*;
[INFO] [stdout]     |         -------- the item `Coord` is already imported here
[INFO] [stdout] 191 |     use crate::board::Board;
[INFO] [stdout] 192 |     use crate::types::{Cell, Color, Coord, File, Rank};
[INFO] [stdout]     |                                     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]    --> src/moves/uci.rs:192:44
[INFO] [stdout]     |
[INFO] [stdout] 190 |     use super::*;
[INFO] [stdout]     |         -------- the item `File` is already imported here
[INFO] [stdout] 191 |     use crate::board::Board;
[INFO] [stdout] 192 |     use crate::types::{Cell, Color, Coord, File, Rank};
[INFO] [stdout]     |                                            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Coord` is imported redundantly
[INFO] [stdout]   --> src/between.rs:45:24
[INFO] [stdout]    |
[INFO] [stdout] 44 |     use super::*;
[INFO] [stdout]    |         -------- the item `Coord` is already imported here
[INFO] [stdout] 45 |     use crate::types::{Coord, File, Rank};
[INFO] [stdout]    |                        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MakeMoveImpl` is never used
[INFO] [stdout]    --> src/moves/base.rs:558:7
[INFO] [stdout]     |
[INFO] [stdout] 558 | trait MakeMoveImpl {
[INFO] [stdout]     |       ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `rand` is imported redundantly
[INFO] [stdout]   --> examples/monkey.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rand::{self, seq::SliceRandom};
[INFO] [stdout]    |            ^^^^ the item `rand` is already defined by prelude
[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: trait `MakeMoveImpl` is never used
[INFO] [stdout]    --> src/moves/base.rs:558:7
[INFO] [stdout]     |
[INFO] [stdout] 558 | trait MakeMoveImpl {
[INFO] [stdout]     |       ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 29.00s
[INFO] running `Command { std: "docker" "inspect" "40ac0846393eb79fd774e160ff5849b97f9a2799ed73081501cd6f5b487f056d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40ac0846393eb79fd774e160ff5849b97f9a2799ed73081501cd6f5b487f056d", kill_on_drop: false }`
[INFO] [stdout] 40ac0846393eb79fd774e160ff5849b97f9a2799ed73081501cd6f5b487f056d