[INFO] cloning repository https://github.com/Masterchef365/char-dither
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Masterchef365/char-dither" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMasterchef365%2Fchar-dither", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMasterchef365%2Fchar-dither'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ddabe1a4cc02a1a65741e93e48cf3708861f0555
[INFO] checking Masterchef365/char-dither against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMasterchef365%2Fchar-dither" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Masterchef365/char-dither
[INFO] finished tweaking git repo https://github.com/Masterchef365/char-dither
[INFO] tweaked toml for git repo https://github.com/Masterchef365/char-dither written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Masterchef365/char-dither 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 git repo https://github.com/Masterchef365/char-dither 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] 6a8fdd6120c41c4d88421c68ece428bfc4bd3f7ec81b1d89f7c6299838c7f896
[INFO] running `Command { std: "docker" "start" "-a" "6a8fdd6120c41c4d88421c68ece428bfc4bd3f7ec81b1d89f7c6299838c7f896", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a8fdd6120c41c4d88421c68ece428bfc4bd3f7ec81b1d89f7c6299838c7f896", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a8fdd6120c41c4d88421c68ece428bfc4bd3f7ec81b1d89f7c6299838c7f896", kill_on_drop: false }`
[INFO] [stdout] 6a8fdd6120c41c4d88421c68ece428bfc4bd3f7ec81b1d89f7c6299838c7f896
[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] 7edf6422599cb35f9b830f0e45ad8b7baca98d5d82524127b3ce156195cdfbb5
[INFO] running `Command { std: "docker" "start" "-a" "7edf6422599cb35f9b830f0e45ad8b7baca98d5d82524127b3ce156195cdfbb5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.7
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking spin v0.9.2
[INFO] [stderr]     Checking deflate v1.0.0
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking weezl v0.1.5
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking miniz_oxide v0.5.1
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]    Compiling anyhow v1.0.53
[INFO] [stderr]     Checking lebe v0.5.1
[INFO] [stderr]     Checking bytemuck v1.7.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking gif v0.11.3
[INFO] [stderr]     Checking png v0.17.3
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking nanorand v0.6.1
[INFO] [stderr]     Checking png v0.14.1
[INFO] [stderr]    Compiling structopt-derive v0.2.18
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking jpeg-decoder v0.2.2
[INFO] [stderr]    Compiling pin-project-internal v1.0.10
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking tiff v0.7.1
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking pin-project v1.0.10
[INFO] [stderr]     Checking image v0.21.3
[INFO] [stderr]     Checking flume v0.10.11
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking exr v1.4.1
[INFO] [stderr]     Checking dither v1.3.7
[INFO] [stderr]     Checking image v0.24.0
[INFO] [stderr]     Checking wordle-quant v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     /// Input image
[INFO] [stdout] 12 | |     #[structopt()]
[INFO] [stdout] 13 | |     input: PathBuf,
[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<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     /// Output debug image to the given path
[INFO] [stdout] 16 | |     #[structopt(short = "u", long)]
[INFO] [stdout] 17 | |     debug_path: Option<PathBuf>,
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | /     /// Algorithm
[INFO] [stdout] 24 | |     /// "floyd" | "steinberg" | "floydsteinberg" | "floyd steinberg" => FLOYD_STEINBERG,
[INFO] [stdout] 25 | |     /// "atkinson" => ATKINSON,
[INFO] [stdout] 26 | |     /// "stucki" => STUCKI,
[INFO] [stdout] ...  |
[INFO] [stdout] 30 | |     #[structopt(short, long, default_value = "floyd")]
[INFO] [stdout] 31 | |     dither_algo: String,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wordle-quant` (bin "wordle-quant" test) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | /     /// Input image
[INFO] [stdout] 12 | |     #[structopt()]
[INFO] [stdout] 13 | |     input: PathBuf,
[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<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     /// Output debug image to the given path
[INFO] [stdout] 16 | |     #[structopt(short = "u", long)]
[INFO] [stdout] 17 | |     debug_path: Option<PathBuf>,
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | /     /// Algorithm
[INFO] [stdout] 24 | |     /// "floyd" | "steinberg" | "floydsteinberg" | "floyd steinberg" => FLOYD_STEINBERG,
[INFO] [stdout] 25 | |     /// "atkinson" => ATKINSON,
[INFO] [stdout] 26 | |     /// "stucki" => STUCKI,
[INFO] [stdout] ...  |
[INFO] [stdout] 30 | |     #[structopt(short, long, default_value = "floyd")]
[INFO] [stdout] 31 | |     dither_algo: String,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wordle-quant` (bin "wordle-quant") due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "7edf6422599cb35f9b830f0e45ad8b7baca98d5d82524127b3ce156195cdfbb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7edf6422599cb35f9b830f0e45ad8b7baca98d5d82524127b3ce156195cdfbb5", kill_on_drop: false }`
[INFO] [stdout] 7edf6422599cb35f9b830f0e45ad8b7baca98d5d82524127b3ce156195cdfbb5