[INFO] cloning repository https://github.com/fernandobandeira/chess_engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fernandobandeira/chess_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffernandobandeira%2Fchess_engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffernandobandeira%2Fchess_engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9155e4b8abd1247c76b866c133bda053c16d7579
[INFO] checking fernandobandeira/chess_engine against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffernandobandeira%2Fchess_engine" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fernandobandeira/chess_engine 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 git repo https://github.com/fernandobandeira/chess_engine
[INFO] finished tweaking git repo https://github.com/fernandobandeira/chess_engine
[INFO] tweaked toml for git repo https://github.com/fernandobandeira/chess_engine written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fernandobandeira/chess_engine 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] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thread-id v4.1.0
[INFO] [stderr]   Downloaded log4rs v1.2.0
[INFO] [stderr]   Downloaded shakmaty v0.26.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ba1f241571a17a6edeab441acd46fe0d86bed57c279349006c693fbfe04c2c38
[INFO] running `Command { std: "docker" "start" "-a" "ba1f241571a17a6edeab441acd46fe0d86bed57c279349006c693fbfe04c2c38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba1f241571a17a6edeab441acd46fe0d86bed57c279349006c693fbfe04c2c38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba1f241571a17a6edeab441acd46fe0d86bed57c279349006c693fbfe04c2c38", kill_on_drop: false }`
[INFO] [stdout] ba1f241571a17a6edeab441acd46fe0d86bed57c279349006c693fbfe04c2c38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 061ea5ba95dd45fd91897dfc1d06d8ce9500e05b3f902dc88a1400b3d847f976
[INFO] running `Command { std: "docker" "start" "-a" "061ea5ba95dd45fd91897dfc1d06d8ce9500e05b3f902dc88a1400b3d847f976", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling anyhow v1.0.72
[INFO] [stderr]     Checking bitflags v2.3.3
[INFO] [stderr]    Compiling thiserror v1.0.43
[INFO] [stderr]     Checking destructure_traitobject v0.2.0
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]    Compiling serde_json v1.0.103
[INFO] [stderr]     Checking iana-time-zone v0.1.57
[INFO] [stderr]    Compiling quote v1.0.31
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking thread-id v4.1.0
[INFO] [stderr]     Checking arc-swap v1.6.0
[INFO] [stderr]     Checking log-mdc v0.1.0
[INFO] [stderr]     Checking unsafe-any-ors v1.0.0
[INFO] [stderr]     Checking typemap-ors v1.0.0
[INFO] [stderr]    Compiling syn v2.0.26
[INFO] [stderr]     Checking btoi v0.4.3
[INFO] [stderr]     Checking ordered-float v2.10.0
[INFO] [stderr]     Checking chrono v0.4.26
[INFO] [stderr]     Checking shakmaty v0.26.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.171
[INFO] [stderr]    Compiling thiserror-impl v1.0.43
[INFO] [stderr]     Checking book v0.1.0 (/opt/rustwide/workdir/book)
[INFO] [stderr]     Checking serde v1.0.171
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]     Checking serde-value v0.7.0
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking log4rs v1.2.0
[INFO] [stderr]     Checking engine v0.1.0 (/opt/rustwide/workdir/engine)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 34.67s
[INFO] running `Command { std: "docker" "inspect" "061ea5ba95dd45fd91897dfc1d06d8ce9500e05b3f902dc88a1400b3d847f976", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "061ea5ba95dd45fd91897dfc1d06d8ce9500e05b3f902dc88a1400b3d847f976", kill_on_drop: false }`
[INFO] [stdout] 061ea5ba95dd45fd91897dfc1d06d8ce9500e05b3f902dc88a1400b3d847f976
[INFO] checking fernandobandeira/chess_engine against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffernandobandeira%2Fchess_engine" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fernandobandeira/chess_engine on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fernandobandeira/chess_engine
[INFO] finished tweaking git repo https://github.com/fernandobandeira/chess_engine
[INFO] tweaked toml for git repo https://github.com/fernandobandeira/chess_engine written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/fernandobandeira/chess_engine 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7afd118b73a75b1133eae16715104b05758cc2d67c31d1ef16b04392a5cb452f
[INFO] running `Command { std: "docker" "start" "-a" "7afd118b73a75b1133eae16715104b05758cc2d67c31d1ef16b04392a5cb452f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7afd118b73a75b1133eae16715104b05758cc2d67c31d1ef16b04392a5cb452f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7afd118b73a75b1133eae16715104b05758cc2d67c31d1ef16b04392a5cb452f", kill_on_drop: false }`
[INFO] [stdout] 7afd118b73a75b1133eae16715104b05758cc2d67c31d1ef16b04392a5cb452f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0493e950701834222b68228799a484327cfe086db51b81b4d9da113cc69d3d1c
[INFO] running `Command { std: "docker" "start" "-a" "0493e950701834222b68228799a484327cfe086db51b81b4d9da113cc69d3d1c", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking bitflags v2.3.3
[INFO] [stderr]     Checking arrayvec v0.7.4
[INFO] [stderr]    Compiling thiserror v1.0.43
[INFO] [stderr]     Checking destructure_traitobject v0.2.0
[INFO] [stderr]    Compiling anyhow v1.0.72
[INFO] [stderr]    Compiling serde_json v1.0.103
[INFO] [stderr]     Checking iana-time-zone v0.1.57
[INFO] [stderr]    Compiling quote v1.0.31
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking thread-id v4.1.0
[INFO] [stderr]     Checking log-mdc v0.1.0
[INFO] [stderr]     Checking arc-swap v1.6.0
[INFO] [stderr]     Checking unsafe-any-ors v1.0.0
[INFO] [stderr]     Checking typemap-ors v1.0.0
[INFO] [stderr]    Compiling syn v2.0.26
[INFO] [stderr]     Checking btoi v0.4.3
[INFO] [stderr]     Checking ordered-float v2.10.0
[INFO] [stderr]     Checking chrono v0.4.26
[INFO] [stderr]     Checking shakmaty v0.26.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.171
[INFO] [stderr]    Compiling thiserror-impl v1.0.43
[INFO] [stderr]     Checking serde v1.0.171
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking serde-value v0.7.0
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]     Checking book v0.1.0 (/opt/rustwide/workdir/book)
[INFO] [stderr]     Checking log4rs v1.2.0
[INFO] [stderr]     Checking engine v0.1.0 (/opt/rustwide/workdir/engine)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 23.85s
[INFO] running `Command { std: "docker" "inspect" "0493e950701834222b68228799a484327cfe086db51b81b4d9da113cc69d3d1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0493e950701834222b68228799a484327cfe086db51b81b4d9da113cc69d3d1c", kill_on_drop: false }`
[INFO] [stdout] 0493e950701834222b68228799a484327cfe086db51b81b4d9da113cc69d3d1c