[INFO] cloning repository https://github.com/BlockCat/rust-sudoku-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BlockCat/rust-sudoku-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBlockCat%2Frust-sudoku-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBlockCat%2Frust-sudoku-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90c18645184d65f96d6b5059f06876efaae0fab4
[INFO] checking BlockCat/rust-sudoku-solver against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBlockCat%2Frust-sudoku-solver" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BlockCat/rust-sudoku-solver on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BlockCat/rust-sudoku-solver
[INFO] finished tweaking git repo https://github.com/BlockCat/rust-sudoku-solver
[INFO] tweaked toml for git repo https://github.com/BlockCat/rust-sudoku-solver written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/BlockCat/rust-sudoku-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded z3-sys v0.4.0
[INFO] [stderr]   Downloaded z3 v0.3.2
[INFO] [stderr]   Downloaded stacker v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bcd6dbf06bde046c8bb49982f15989ce3ea07c55891c0a5be583c925144e1bfe
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bcd6dbf06bde046c8bb49982f15989ce3ea07c55891c0a5be583c925144e1bfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bcd6dbf06bde046c8bb49982f15989ce3ea07c55891c0a5be583c925144e1bfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcd6dbf06bde046c8bb49982f15989ce3ea07c55891c0a5be583c925144e1bfe", kill_on_drop: false }`
[INFO] [stdout] bcd6dbf06bde046c8bb49982f15989ce3ea07c55891c0a5be583c925144e1bfe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b13809fb18e48a97b895e230323d19c74d972623bc2e918aa3dfc2c945043e99
[INFO] running `Command { std: "docker" "start" "-a" "b13809fb18e48a97b895e230323d19c74d972623bc2e918aa3dfc2c945043e99", kill_on_drop: false }`
[INFO] [stderr]    Compiling stacker v0.1.5
[INFO] [stderr]     Checking sudokusolver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `remove_item` found for struct `Vec<u8>` in the current scope
[INFO] [stdout]    --> src/lib.rs:123:28
[INFO] [stdout]     |
[INFO] [stdout] 123 |                     values.remove_item(&v);
[INFO] [stdout]     |                            ^^^^^^^^^^^ method not found in `Vec<u8>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_item` found for struct `Vec<u8>` in the current scope
[INFO] [stdout]    --> src/lib.rs:123:28
[INFO] [stdout]     |
[INFO] [stdout] 123 |                     values.remove_item(&v);
[INFO] [stdout]     |                            ^^^^^^^^^^^ method not found in `Vec<u8>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sudokusolver`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "b13809fb18e48a97b895e230323d19c74d972623bc2e918aa3dfc2c945043e99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b13809fb18e48a97b895e230323d19c74d972623bc2e918aa3dfc2c945043e99", kill_on_drop: false }`
[INFO] [stdout] b13809fb18e48a97b895e230323d19c74d972623bc2e918aa3dfc2c945043e99