[INFO] fetching crate memega 0.1.0...
[INFO] testing memega-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate memega 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate memega 0.1.0
[INFO] finished tweaking crates.io crate memega 0.1.0
[INFO] tweaked toml for crates.io crate memega 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate memega 0.1.0 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 memega 0.1.0 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 }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 6d37c5e24c0b229f0777ddd8a400eb289430d934b89f1446778019eef4440811
[INFO] running `Command { std: "docker" "start" "-a" "6d37c5e24c0b229f0777ddd8a400eb289430d934b89f1446778019eef4440811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d37c5e24c0b229f0777ddd8a400eb289430d934b89f1446778019eef4440811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d37c5e24c0b229f0777ddd8a400eb289430d934b89f1446778019eef4440811", kill_on_drop: false }`
[INFO] [stdout] 6d37c5e24c0b229f0777ddd8a400eb289430d934b89f1446778019eef4440811
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 79dd8dd36d9a89a465e867f6a1aff80df5e1c1f80e896c639937dc0a7d3788f1
[INFO] running `Command { std: "docker" "start" "-a" "79dd8dd36d9a89a465e867f6a1aff80df5e1c1f80e896c639937dc0a7d3788f1", kill_on_drop: false }`
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[INFO] [stderr]    Compiling memega v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | #![feature(array_chunks, is_sorted, trait_alias)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `is_sorted` has been stable since 1.82.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:37:26
[INFO] [stdout]    |
[INFO] [stdout] 37 | #![feature(array_chunks, is_sorted, trait_alias)]
[INFO] [stdout]    |                          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `array_chunks`
[INFO] [stdout]   --> src/lib.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 | #![feature(array_chunks, is_sorted, trait_alias)]
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `array_chunks` found for struct `SmallVec<[usize; 4]>` in the current scope
[INFO] [stdout]    --> src/ops/crossover.rs:200:30
[INFO] [stdout]     |
[INFO] [stdout] 200 |     for &[st, en] in xpoints.array_chunks::<2>() {
[INFO] [stdout]     |                              ^^^^^^^^^^^^ `SmallVec<[usize; 4]>` is not an iterator
[INFO] [stdout]     |
[INFO] [stdout] help: call `.into_iter()` first
[INFO] [stdout]     |
[INFO] [stdout] 200 |     for &[st, en] in xpoints.into_iter().array_chunks::<2>() {
[INFO] [stdout]     |                              ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memega` (lib) due to 3 previous errors; 1 warning emitted
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "79dd8dd36d9a89a465e867f6a1aff80df5e1c1f80e896c639937dc0a7d3788f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79dd8dd36d9a89a465e867f6a1aff80df5e1c1f80e896c639937dc0a7d3788f1", kill_on_drop: false }`
[INFO] [stdout] 79dd8dd36d9a89a465e867f6a1aff80df5e1c1f80e896c639937dc0a7d3788f1