[INFO] fetching crate nerio 0.1.1...
[INFO] testing nerio-0.1.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate nerio 0.1.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate nerio 0.1.1
[INFO] finished tweaking crates.io crate nerio 0.1.1
[INFO] tweaked toml for crates.io crate nerio 0.1.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nerio 0.1.1 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nerio 0.1.1 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" "+1.90.0" "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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4769b9f2220e68af049775ac6e0bbda60bfd202b64545ec90f9603d9b9db8e2
[INFO] running `Command { std: "docker" "start" "-a" "f4769b9f2220e68af049775ac6e0bbda60bfd202b64545ec90f9603d9b9db8e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4769b9f2220e68af049775ac6e0bbda60bfd202b64545ec90f9603d9b9db8e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4769b9f2220e68af049775ac6e0bbda60bfd202b64545ec90f9603d9b9db8e2", kill_on_drop: false }`
[INFO] [stdout] f4769b9f2220e68af049775ac6e0bbda60bfd202b64545ec90f9603d9b9db8e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37ee2ba803d590b18807e0965b5470f265db86c6006c56cb5829fe310f303a01
[INFO] running `Command { std: "docker" "start" "-a" "37ee2ba803d590b18807e0965b5470f265db86c6006c56cb5829fe310f303a01", kill_on_drop: false }`
[INFO] [stderr]    Compiling nerio v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(portable_simd)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AddAssign`, `Add`, `Div`, `IndexMut`, `Index`, and `Mul`
[INFO] [stdout]  --> src/lib.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::ops::{Add, AddAssign, Div, Index, IndexMut, Mul};
[INFO] [stdout]   |                ^^^  ^^^^^^^^^  ^^^  ^^^^^  ^^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `layers`
[INFO] [stdout]    --> src/lib.rs:227:14
[INFO] [stdout]     |
[INFO] [stdout] 227 | macro_rules! layers {
[INFO] [stdout]     |              ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `activate`
[INFO] [stdout]    --> src/lib.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |                 let activate = Nth::<Idx>::nth(&self.f);
[INFO] [stdout]     |                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_activate`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `nerio` (lib) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "37ee2ba803d590b18807e0965b5470f265db86c6006c56cb5829fe310f303a01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37ee2ba803d590b18807e0965b5470f265db86c6006c56cb5829fe310f303a01", kill_on_drop: false }`
[INFO] [stdout] 37ee2ba803d590b18807e0965b5470f265db86c6006c56cb5829fe310f303a01