[INFO] cloning repository https://github.com/Prepodobnuy/colorz_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Prepodobnuy/colorz_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPrepodobnuy%2Fcolorz_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPrepodobnuy%2Fcolorz_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 94f86b4cfd3dc7895d3fadcb0eafb597d21bb4e0
[INFO] checking Prepodobnuy/colorz_rust 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%2FPrepodobnuy%2Fcolorz_rust" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Prepodobnuy/colorz_rust
[INFO] finished tweaking git repo https://github.com/Prepodobnuy/colorz_rust
[INFO] tweaked toml for git repo https://github.com/Prepodobnuy/colorz_rust written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Prepodobnuy/colorz_rust 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/Prepodobnuy/colorz_rust 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 7db0a795edd812ba5f0baaa02da1828128cf167b1d4e9549707348abc5638330
[INFO] running `Command { std: "docker" "start" "-a" "7db0a795edd812ba5f0baaa02da1828128cf167b1d4e9549707348abc5638330", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7db0a795edd812ba5f0baaa02da1828128cf167b1d4e9549707348abc5638330", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7db0a795edd812ba5f0baaa02da1828128cf167b1d4e9549707348abc5638330", kill_on_drop: false }`
[INFO] [stdout] 7db0a795edd812ba5f0baaa02da1828128cf167b1d4e9549707348abc5638330
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] b139ea6ddf4bed4a087c6de7d6780d86587be770cff5762b6485da851bd4434e
[INFO] running `Command { std: "docker" "start" "-a" "b139ea6ddf4bed4a087c6de7d6780d86587be770cff5762b6485da851bd4434e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]     Checking miniz_oxide v0.8.8
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking getrandom v0.3.2
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking bytemuck v1.22.0
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking color_space v0.5.4
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rand v0.9.1
[INFO] [stderr]     Checking flate2 v1.1.1
[INFO] [stderr]     Checking png v0.17.16
[INFO] [stderr]     Checking image v0.24.9
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling phf_macros v0.11.3
[INFO] [stderr]    Compiling palette_derive v0.7.6
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking phf v0.11.3
[INFO] [stderr]     Checking palette v0.7.6
[INFO] [stderr]     Checking kmeans_colors v0.6.0
[INFO] [stderr]     Checking colorz_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<Vec<Color>, error::Error>
[INFO] [stdout]   --> src/colorz.rs:21:32
[INFO] [stdout]    |
[INFO] [stdout] 21 |   ) -> Result<Vec<Color>, Error> {
[INFO] [stdout]    |  ________________________________^
[INFO] [stdout] 22 | |     let clamp_colors = clamp_colors_by_value(pixels, color_format, V_CLAMP_MIN, V_CLAMP_MAX);
[INFO] [stdout] 23 | |     let lab_colors = colors_to_lab(&clamp_colors);
[INFO] [stdout] 24 | |     let clusters = get_clusters(&lab_colors);
[INFO] [stdout] ...  |
[INFO] [stdout] 29 | |     Ok(palette)
[INFO] [stdout] 30 | | }
[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<Vec<Color>, error::Error>
[INFO] [stdout]   --> src/colorz.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Ok(palette)
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `colorz_rust` (lib test) due to 2 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<Vec<Color>, error::Error>
[INFO] [stdout]   --> src/colorz.rs:21:32
[INFO] [stdout]    |
[INFO] [stdout] 21 |   ) -> Result<Vec<Color>, Error> {
[INFO] [stdout]    |  ________________________________^
[INFO] [stdout] 22 | |     let clamp_colors = clamp_colors_by_value(pixels, color_format, V_CLAMP_MIN, V_CLAMP_MAX);
[INFO] [stdout] 23 | |     let lab_colors = colors_to_lab(&clamp_colors);
[INFO] [stdout] 24 | |     let clusters = get_clusters(&lab_colors);
[INFO] [stdout] ...  |
[INFO] [stdout] 29 | |     Ok(palette)
[INFO] [stdout] 30 | | }
[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<Vec<Color>, error::Error>
[INFO] [stdout]   --> src/colorz.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Ok(palette)
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `colorz_rust` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "b139ea6ddf4bed4a087c6de7d6780d86587be770cff5762b6485da851bd4434e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b139ea6ddf4bed4a087c6de7d6780d86587be770cff5762b6485da851bd4434e", kill_on_drop: false }`
[INFO] [stdout] b139ea6ddf4bed4a087c6de7d6780d86587be770cff5762b6485da851bd4434e
