[INFO] fetching crate mutils 3.0.1...
[INFO] checking mutils-3.0.1 against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] extracting crate mutils 3.0.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mutils 3.0.1 on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mutils 3.0.1
[INFO] finished tweaking crates.io crate mutils 3.0.1
[INFO] tweaked toml for crates.io crate mutils 3.0.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8329ad78a239e8c95f888196281846c7eb22b7cbab51a6ab619e755d3a6cbb77
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8329ad78a239e8c95f888196281846c7eb22b7cbab51a6ab619e755d3a6cbb77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8329ad78a239e8c95f888196281846c7eb22b7cbab51a6ab619e755d3a6cbb77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8329ad78a239e8c95f888196281846c7eb22b7cbab51a6ab619e755d3a6cbb77", kill_on_drop: false }`
[INFO] [stdout] 8329ad78a239e8c95f888196281846c7eb22b7cbab51a6ab619e755d3a6cbb77
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 029a3f9dce20d27a37926e34c2d0935a9d282e517819ed5e712d304dc7b9f97d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "029a3f9dce20d27a37926e34c2d0935a9d282e517819ed5e712d304dc7b9f97d", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking mutils v3.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `f32_to_hex_u32`
[INFO] [stdout]   --> src/colour.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     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:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     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:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |     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:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     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:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     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:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |     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 3.43s
[INFO] running `Command { std: "docker" "inspect" "029a3f9dce20d27a37926e34c2d0935a9d282e517819ed5e712d304dc7b9f97d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "029a3f9dce20d27a37926e34c2d0935a9d282e517819ed5e712d304dc7b9f97d", kill_on_drop: false }`
[INFO] [stdout] 029a3f9dce20d27a37926e34c2d0935a9d282e517819ed5e712d304dc7b9f97d