[INFO] cloning repository https://github.com/lynerlok/icc_reader
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lynerlok/icc_reader" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flynerlok%2Ficc_reader", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flynerlok%2Ficc_reader'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2e2b871476420638e6f1c246b7b60dbe59ca2829
[INFO] checking lynerlok/icc_reader 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%2Flynerlok%2Ficc_reader" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lynerlok/icc_reader
[INFO] finished tweaking git repo https://github.com/lynerlok/icc_reader
[INFO] tweaked toml for git repo https://github.com/lynerlok/icc_reader written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lynerlok/icc_reader 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/lynerlok/icc_reader 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 189e78909a6923d697022274e09284364425584706ed000fdafb3f456f08ed5a
[INFO] running `Command { std: "docker" "start" "-a" "189e78909a6923d697022274e09284364425584706ed000fdafb3f456f08ed5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "189e78909a6923d697022274e09284364425584706ed000fdafb3f456f08ed5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "189e78909a6923d697022274e09284364425584706ed000fdafb3f456f08ed5a", kill_on_drop: false }`
[INFO] [stdout] 189e78909a6923d697022274e09284364425584706ed000fdafb3f456f08ed5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 732d0a4cc4b0c94785c225a02203a9add72209a2a8d2280186470b64d365127d
[INFO] running `Command { std: "docker" "start" "-a" "732d0a4cc4b0c94785c225a02203a9add72209a2a8d2280186470b64d365127d", kill_on_drop: false }`
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling fixed v1.29.0
[INFO] [stderr]     Checking bytemuck v1.22.0
[INFO] [stderr]     Checking half v2.5.0
[INFO] [stderr]     Checking icc-reader v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]    --> src/parse_icc.rs:217:26
[INFO] [stdout]     |
[INFO] [stdout] 217 |                     for (idx, tag_num) in (0..(pf_tag_table_size)).enumerate() {
[INFO] [stdout]     |                          ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `idx`
[INFO] [stdout]    --> src/parse_icc.rs:217:26
[INFO] [stdout]     |
[INFO] [stdout] 217 |                     for (idx, tag_num) in (0..(pf_tag_table_size)).enumerate() {
[INFO] [stdout]     |                          ^^^ help: if this is intentional, prefix it with an underscore: `_idx`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `itu_r_bt1886` is never used
[INFO] [stdout]   --> src/icc_utils.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn itu_r_bt1886(input_signal: f32, white_lum: f32, black_lum: f32) -> Result<f32, String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/bytes_utils.rs:48:23
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let usize = match usize::try_from(u16) {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `itu_r_bt1886` is never used
[INFO] [stdout]   --> src/icc_utils.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn itu_r_bt1886(input_signal: f32, white_lum: f32, black_lum: f32) -> Result<f32, String> {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/bytes_utils.rs:48:23
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let usize = match usize::try_from(u16) {
[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 `icc-reader` (bin "icc-reader" test) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `icc-reader` (bin "icc-reader") due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "732d0a4cc4b0c94785c225a02203a9add72209a2a8d2280186470b64d365127d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "732d0a4cc4b0c94785c225a02203a9add72209a2a8d2280186470b64d365127d", kill_on_drop: false }`
[INFO] [stdout] 732d0a4cc4b0c94785c225a02203a9add72209a2a8d2280186470b64d365127d