[INFO] fetching crate krait 0.1.7...
[INFO] checking krait-0.1.7 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate krait 0.1.7 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate krait 0.1.7
[INFO] finished tweaking crates.io crate krait 0.1.7
[INFO] tweaked toml for crates.io crate krait 0.1.7 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate krait 0.1.7 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1319ba3a2451b7b0f75459e903a29edc02b3c5e7da38894410f838d2910ce794
[INFO] running `Command { std: "docker" "start" "-a" "1319ba3a2451b7b0f75459e903a29edc02b3c5e7da38894410f838d2910ce794", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1319ba3a2451b7b0f75459e903a29edc02b3c5e7da38894410f838d2910ce794", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1319ba3a2451b7b0f75459e903a29edc02b3c5e7da38894410f838d2910ce794", kill_on_drop: false }`
[INFO] [stdout] 1319ba3a2451b7b0f75459e903a29edc02b3c5e7da38894410f838d2910ce794
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d01285b42c5038793bd770eeb20f2901d51bf5a0426e97a59f65afb3ed977b2
[INFO] running `Command { std: "docker" "start" "-a" "7d01285b42c5038793bd770eeb20f2901d51bf5a0426e97a59f65afb3ed977b2", kill_on_drop: false }`
[INFO] [stderr]     Checking krait v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `log_level`
[INFO] [stdout]   --> src/engine/logging.rs:27:56
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn log_message(engine: &mut Engine, message: &str, log_level: LogLevel) {
[INFO] [stdout]    |                                                        ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_log_level`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/engine/scene.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut scenes = Vec::new();
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `is_running` is never read
[INFO] [stdout]  --> src/engine/core.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Engine {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 5 |     pub(crate) is_running: bool,
[INFO] [stdout]   |                ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `message` and `level` are never read
[INFO] [stdout]   --> src/engine/logging.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Log {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout] 16 |     message: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 17 |     level: LogLevel,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `log_level`
[INFO] [stdout]   --> src/engine/logging.rs:27:56
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn log_message(engine: &mut Engine, message: &str, log_level: LogLevel) {
[INFO] [stdout]    |                                                        ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_log_level`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/engine/scene.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let mut scenes = Vec::new();
[INFO] [stdout]   |         ----^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `is_running` is never read
[INFO] [stdout]  --> src/engine/core.rs:5:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Engine {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 5 |     pub(crate) is_running: bool,
[INFO] [stdout]   |                ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `message` and `level` are never read
[INFO] [stdout]   --> src/engine/logging.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Log {
[INFO] [stdout]    |            --- fields in this struct
[INFO] [stdout] 16 |     message: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 17 |     level: LogLevel,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "7d01285b42c5038793bd770eeb20f2901d51bf5a0426e97a59f65afb3ed977b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d01285b42c5038793bd770eeb20f2901d51bf5a0426e97a59f65afb3ed977b2", kill_on_drop: false }`
[INFO] [stdout] 7d01285b42c5038793bd770eeb20f2901d51bf5a0426e97a59f65afb3ed977b2