[INFO] fetching crate mutils 3.0.5...
[INFO] checking mutils-3.0.5 against try#e0f03aec47b100bc29555561bd62a99d1bc6aca5 for pr-86231
[INFO] extracting crate mutils 3.0.5 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate mutils 3.0.5 on toolchain e0f03aec47b100bc29555561bd62a99d1bc6aca5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mutils 3.0.5
[INFO] finished tweaking crates.io crate mutils 3.0.5
[INFO] tweaked toml for crates.io crate mutils 3.0.5 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63e7c8e2eefc9d69c998661ff22d1aca1ed3e0b6c02d155c30d7529ace3628cd
[INFO] running `Command { std: "docker" "start" "-a" "63e7c8e2eefc9d69c998661ff22d1aca1ed3e0b6c02d155c30d7529ace3628cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63e7c8e2eefc9d69c998661ff22d1aca1ed3e0b6c02d155c30d7529ace3628cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63e7c8e2eefc9d69c998661ff22d1aca1ed3e0b6c02d155c30d7529ace3628cd", kill_on_drop: false }`
[INFO] [stdout] 63e7c8e2eefc9d69c998661ff22d1aca1ed3e0b6c02d155c30d7529ace3628cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+e0f03aec47b100bc29555561bd62a99d1bc6aca5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb6b30485b2d31a4a280c035b4edb48afe5dbde0c487175badf74587ea4c829e
[INFO] running `Command { std: "docker" "start" "-a" "cb6b30485b2d31a4a280c035b4edb48afe5dbde0c487175badf74587ea4c829e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking mutils v3.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `f32_to_hex_u32`
[INFO] [stdout]   --> src/colour.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn f32_to_hex_u32(val: f32, shift: u8) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `clamp_u8_to_f32`
[INFO] [stdout]   --> src/colour.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn clamp_u8_to_f32(val: u8) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `f32_to_rgba_u8`
[INFO] [stdout]   --> src/colour.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn f32_to_rgba_u8(val: f32) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `f32_to_hex_u32`
[INFO] [stdout]   --> src/colour.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn f32_to_hex_u32(val: f32, shift: u8) -> u32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `clamp_u8_to_f32`
[INFO] [stdout]   --> src/colour.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn clamp_u8_to_f32(val: u8) -> f32 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `f32_to_rgba_u8`
[INFO] [stdout]   --> src/colour.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 |     fn f32_to_rgba_u8(val: f32) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.14s
[INFO] running `Command { std: "docker" "inspect" "cb6b30485b2d31a4a280c035b4edb48afe5dbde0c487175badf74587ea4c829e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb6b30485b2d31a4a280c035b4edb48afe5dbde0c487175badf74587ea4c829e", kill_on_drop: false }`
[INFO] [stdout] cb6b30485b2d31a4a280c035b4edb48afe5dbde0c487175badf74587ea4c829e