[INFO] fetching crate sudoku-cli 0.2.0... [INFO] checking sudoku-cli-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] extracting crate sudoku-cli 0.2.0 into /workspace/builds/worker-5-tc2/source [INFO] started tweaking crates.io crate sudoku-cli 0.2.0 [INFO] finished tweaking crates.io crate sudoku-cli 0.2.0 [INFO] tweaked toml for crates.io crate sudoku-cli 0.2.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate sudoku-cli 0.2.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate sudoku-cli 0.2.0 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e49de7650ea819d0fada5776c35107bbe9a57c3917703b5e3c9a042e0e81804a [INFO] running `Command { std: "docker" "start" "-a" "e49de7650ea819d0fada5776c35107bbe9a57c3917703b5e3c9a042e0e81804a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e49de7650ea819d0fada5776c35107bbe9a57c3917703b5e3c9a042e0e81804a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e49de7650ea819d0fada5776c35107bbe9a57c3917703b5e3c9a042e0e81804a", kill_on_drop: false }` [INFO] [stdout] e49de7650ea819d0fada5776c35107bbe9a57c3917703b5e3c9a042e0e81804a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] d19500b62fbd93ddc2f257d4a314abfab88b9e12ee94caa8edc2c798d275e45f [INFO] running `Command { std: "docker" "start" "-a" "d19500b62fbd93ddc2f257d4a314abfab88b9e12ee94caa8edc2c798d275e45f", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.65 [INFO] [stderr] Compiling arrayvec v0.4.12 [INFO] [stderr] Compiling syn v1.0.5 [INFO] [stderr] Compiling unicode-segmentation v1.3.0 [INFO] [stderr] Checking unicode-width v0.1.6 [INFO] [stderr] Compiling rayon-core v1.6.0 [INFO] [stderr] Compiling memoffset v0.5.1 [INFO] [stderr] Checking either v1.5.3 [INFO] [stderr] Checking ansi-escapes v0.1.0 [INFO] [stderr] Checking crossbeam-queue v0.1.2 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Compiling heck v0.3.1 [INFO] [stderr] Checking crossbeam-epoch v0.7.2 [INFO] [stderr] Checking crossbeam-deque v0.7.1 [INFO] [stderr] Checking atty v0.2.13 [INFO] [stderr] Checking num_cpus v1.10.1 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking rayon v1.2.0 [INFO] [stderr] Compiling proc-macro-error v0.2.6 [INFO] [stderr] Compiling structopt-derive v0.3.3 [INFO] [stderr] Checking structopt v0.3.3 [INFO] [stderr] Checking sudoku-cli v0.2.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:15:13 [INFO] [stdout] | [INFO] [stdout] 15 | IOError(std::io::Error), [INFO] [stdout] | ------- ^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `SudokuError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 15 - IOError(std::io::Error), [INFO] [stdout] 15 + IOError(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:16:16 [INFO] [stdout] | [INFO] [stdout] 16 | RayonError(rayon::ThreadPoolBuildError), [INFO] [stdout] | ---------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `SudokuError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 16 - RayonError(rayon::ThreadPoolBuildError), [INFO] [stdout] 16 + RayonError(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:48:5 [INFO] [stdout] | [INFO] [stdout] 48 | / /// The path to a puzzle or a puzzle string (for examples: sudoku-cli help) [INFO] [stdout] 49 | | #[structopt(short = "i", long = "input")] [INFO] [stdout] 50 | | input: String, [INFO] [stdout] | |_________________^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:56:5 [INFO] [stdout] | [INFO] [stdout] 56 | / /// The path to a file to which the solutions will be written. [INFO] [stdout] 57 | | #[structopt(short = "o", long = "output")] [INFO] [stdout] 58 | | output: Option, [INFO] [stdout] | |__________________________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:67:5 [INFO] [stdout] | [INFO] [stdout] 67 | / /// The path to a puzzle or a puzzle string (for examples: sudoku-cli help) [INFO] [stdout] 68 | | #[structopt(short = "i", long = "input")] [INFO] [stdout] 69 | | input: String, [INFO] [stdout] | |_________________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:78:5 [INFO] [stdout] | [INFO] [stdout] 78 | / /// The path to a puzzle or a puzzle string (for examples: sudoku-cli help) [INFO] [stdout] 79 | | #[structopt(short = "i", long = "input")] [INFO] [stdout] 80 | | input: String, [INFO] [stdout] | |_________________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `sudoku-cli` (bin "sudoku-cli") due to 4 previous errors; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:15:13 [INFO] [stdout] | [INFO] [stdout] 15 | IOError(std::io::Error), [INFO] [stdout] | ------- ^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `SudokuError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 15 - IOError(std::io::Error), [INFO] [stdout] 15 + IOError(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:16:16 [INFO] [stdout] | [INFO] [stdout] 16 | RayonError(rayon::ThreadPoolBuildError), [INFO] [stdout] | ---------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `SudokuError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 16 - RayonError(rayon::ThreadPoolBuildError), [INFO] [stdout] 16 + RayonError(()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:48:5 [INFO] [stdout] | [INFO] [stdout] 48 | / /// The path to a puzzle or a puzzle string (for examples: sudoku-cli help) [INFO] [stdout] 49 | | #[structopt(short = "i", long = "input")] [INFO] [stdout] 50 | | input: String, [INFO] [stdout] | |_________________^ [INFO] [stdout] | [INFO] [stdout] = note: requested on the command line with `-D unmustuse-in-always-ok` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `sudoku-cli` (bin "sudoku-cli" test) due to 4 previous errors; 2 warnings emitted [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:56:5 [INFO] [stdout] | [INFO] [stdout] 56 | / /// The path to a file to which the solutions will be written. [INFO] [stdout] 57 | | #[structopt(short = "o", long = "output")] [INFO] [stdout] 58 | | output: Option, [INFO] [stdout] | |__________________________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:67:5 [INFO] [stdout] | [INFO] [stdout] 67 | / /// The path to a puzzle or a puzzle string (for examples: sudoku-cli help) [INFO] [stdout] 68 | | #[structopt(short = "i", long = "input")] [INFO] [stdout] 69 | | input: String, [INFO] [stdout] | |_________________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result [INFO] [stdout] --> src/main.rs:78:5 [INFO] [stdout] | [INFO] [stdout] 78 | / /// The path to a puzzle or a puzzle string (for examples: sudoku-cli help) [INFO] [stdout] 79 | | #[structopt(short = "i", long = "input")] [INFO] [stdout] 80 | | input: String, [INFO] [stdout] | |_________________^ [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "d19500b62fbd93ddc2f257d4a314abfab88b9e12ee94caa8edc2c798d275e45f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d19500b62fbd93ddc2f257d4a314abfab88b9e12ee94caa8edc2c798d275e45f", kill_on_drop: false }` [INFO] [stdout] d19500b62fbd93ddc2f257d4a314abfab88b9e12ee94caa8edc2c798d275e45f