[INFO] cloning repository https://github.com/johanyim/chess-tui
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johanyim/chess-tui" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohanyim%2Fchess-tui", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohanyim%2Fchess-tui'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 98ddf1dd7cffee9fef45fcd652293b1ae0a88de2
[INFO] checking johanyim/chess-tui against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohanyim%2Fchess-tui" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johanyim/chess-tui 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/johanyim/chess-tui
[INFO] finished tweaking git repo https://github.com/johanyim/chess-tui
[INFO] tweaked toml for git repo https://github.com/johanyim/chess-tui written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/johanyim/chess-tui 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2a18ff89f7c2d591faa2129149a59316bf730b425cfc9a894ee9d927049c964f
[INFO] running `Command { std: "docker" "start" "-a" "2a18ff89f7c2d591faa2129149a59316bf730b425cfc9a894ee9d927049c964f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a18ff89f7c2d591faa2129149a59316bf730b425cfc9a894ee9d927049c964f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a18ff89f7c2d591faa2129149a59316bf730b425cfc9a894ee9d927049c964f", kill_on_drop: false }`
[INFO] [stdout] 2a18ff89f7c2d591faa2129149a59316bf730b425cfc9a894ee9d927049c964f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 474a7bbcfa05a805ef56e16842d12933f529897b4f513af3a71c68ae8b78cbeb
[INFO] running `Command { std: "docker" "start" "-a" "474a7bbcfa05a805ef56e16842d12933f529897b4f513af3a71c68ae8b78cbeb", kill_on_drop: false }`
[INFO] [stderr]     Checking chess-tui v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/board.rs:85:26
[INFO] [stdout]    |
[INFO] [stdout] 85 |                     Some(p) => b.push('t'),//push(&p.fen()), 
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rank`
[INFO] [stdout]   --> src/board.rs:96:22
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub fn rank_from_str(rank: &str) -> [Option<Piece>; 8] {
[INFO] [stdout]    |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_rank`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/board.rs:85:26
[INFO] [stdout]    |
[INFO] [stdout] 85 |                     Some(p) => b.push('t'),//push(&p.fen()), 
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rank`
[INFO] [stdout]   --> src/board.rs:96:22
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub fn rank_from_str(rank: &str) -> [Option<Piece>; 8] {
[INFO] [stdout]    |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_rank`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lib.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let b = Board::new();
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lib.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let b = Board::build_from_fen(String::from("rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3 0 1"));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lib.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let b = Board::build_from_fen(String::from("rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR w"));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "474a7bbcfa05a805ef56e16842d12933f529897b4f513af3a71c68ae8b78cbeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "474a7bbcfa05a805ef56e16842d12933f529897b4f513af3a71c68ae8b78cbeb", kill_on_drop: false }`
[INFO] [stdout] 474a7bbcfa05a805ef56e16842d12933f529897b4f513af3a71c68ae8b78cbeb
[INFO] checking johanyim/chess-tui against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohanyim%2Fchess-tui" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johanyim/chess-tui 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/johanyim/chess-tui
[INFO] finished tweaking git repo https://github.com/johanyim/chess-tui
[INFO] tweaked toml for git repo https://github.com/johanyim/chess-tui written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/johanyim/chess-tui 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 4ace6442edba952173ae89e698a71e2357bc6fb6956d80fdb1fa7f883c48dc76
[INFO] running `Command { std: "docker" "start" "-a" "4ace6442edba952173ae89e698a71e2357bc6fb6956d80fdb1fa7f883c48dc76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ace6442edba952173ae89e698a71e2357bc6fb6956d80fdb1fa7f883c48dc76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ace6442edba952173ae89e698a71e2357bc6fb6956d80fdb1fa7f883c48dc76", kill_on_drop: false }`
[INFO] [stdout] 4ace6442edba952173ae89e698a71e2357bc6fb6956d80fdb1fa7f883c48dc76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] d7fdc1bb25a76c8e77fbbcbced475736b4db03aa28f81a9c071daa4dd97f57a0
[INFO] running `Command { std: "docker" "start" "-a" "d7fdc1bb25a76c8e77fbbcbced475736b4db03aa28f81a9c071daa4dd97f57a0", kill_on_drop: false }`
[INFO] [stderr]     Checking chess-tui v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/board.rs:85:26
[INFO] [stdout]    |
[INFO] [stdout] 85 |                     Some(p) => b.push('t'),//push(&p.fen()), 
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/board.rs:85:26
[INFO] [stdout]    |
[INFO] [stdout] 85 |                     Some(p) => b.push('t'),//push(&p.fen()), 
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rank`
[INFO] [stdout]   --> src/board.rs:96:22
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub fn rank_from_str(rank: &str) -> [Option<Piece>; 8] {
[INFO] [stdout]    |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_rank`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rank`
[INFO] [stdout]   --> src/board.rs:96:22
[INFO] [stdout]    |
[INFO] [stdout] 96 | pub fn rank_from_str(rank: &str) -> [Option<Piece>; 8] {
[INFO] [stdout]    |                      ^^^^ help: if this is intentional, prefix it with an underscore: `_rank`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lib.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let b = Board::new();
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lib.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |         let b = Board::build_from_fen(String::from("rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3 0 1"));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lib.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let b = Board::build_from_fen(String::from("rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR w"));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "d7fdc1bb25a76c8e77fbbcbced475736b4db03aa28f81a9c071daa4dd97f57a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7fdc1bb25a76c8e77fbbcbced475736b4db03aa28f81a9c071daa4dd97f57a0", kill_on_drop: false }`
[INFO] [stdout] d7fdc1bb25a76c8e77fbbcbced475736b4db03aa28f81a9c071daa4dd97f57a0