[INFO] fetching crate mvutils 1.6.1...
[INFO] testing mvutils-1.6.1 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate mvutils 1.6.1 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate mvutils 1.6.1
[INFO] finished tweaking crates.io crate mvutils 1.6.1
[INFO] tweaked toml for crates.io crate mvutils 1.6.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mvutils 1.6.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mvutils 1.6.1 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" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e09af12584a6473b8b7d1b320085d3383e092bd0ff371ac7480d1e7a79b35c36
[INFO] running `Command { std: "docker" "start" "-a" "e09af12584a6473b8b7d1b320085d3383e092bd0ff371ac7480d1e7a79b35c36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e09af12584a6473b8b7d1b320085d3383e092bd0ff371ac7480d1e7a79b35c36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e09af12584a6473b8b7d1b320085d3383e092bd0ff371ac7480d1e7a79b35c36", kill_on_drop: false }`
[INFO] [stdout] e09af12584a6473b8b7d1b320085d3383e092bd0ff371ac7480d1e7a79b35c36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=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" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7abef93b9251f1c1bcf209d9c770b58b67f355b6aa594b1acb7fab48fada1b3c
[INFO] running `Command { std: "docker" "start" "-a" "7abef93b9251f1c1bcf209d9c770b58b67f355b6aa594b1acb7fab48fada1b3c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]    Compiling core_extensions v1.5.3
[INFO] [stderr]    Compiling tstr_proc_macros v0.2.2
[INFO] [stderr]    Compiling serde_json v1.0.142
[INFO] [stderr]    Compiling core_extensions_proc_macros v1.5.3
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling typed-arena v2.0.2
[INFO] [stderr]    Compiling abi_stable_shared v0.11.0
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stderr]    Compiling generational-arena v0.2.9
[INFO] [stderr]    Compiling tstr v0.2.4
[INFO] [stderr]    Compiling const_panic v0.2.13
[INFO] [stderr]    Compiling repr_offset v0.2.2
[INFO] [stderr]    Compiling foldhash v0.1.3
[INFO] [stderr]    Compiling allocator-api2 v0.2.16
[INFO] [stderr]    Compiling bytebuffer v2.3.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.90
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling hashbrown v0.15.2
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling mvutils-proc-macro v1.1.4
[INFO] [stderr]    Compiling as_derive_utils v0.11.0
[INFO] [stderr]    Compiling abi_stable_derive v0.11.3
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling abi_stable v0.11.3
[INFO] [stderr]    Compiling mvutils v1.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(array_try_from_fn)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::alloc::Layout`
[INFO] [stdout]  --> src/unsafe_utils.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::alloc::Layout;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `AtomicUsize` and `Ordering`
[INFO] [stdout]  --> src/unsafe_utils.rs:7:25
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::sync::atomic::{AtomicUsize, Ordering};
[INFO] [stdout]   |                         ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::Arc`
[INFO] [stdout]  --> src/unsafe_utils.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::sync::Arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Deref`
[INFO] [stdout]  --> src/unsafe_utils.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::ops::{Deref, DerefMut};
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DerefMut`
[INFO] [stdout]  --> src/unsafe_utils.rs:6:23
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::ops::{Deref, DerefMut};
[INFO] [stdout]   |                       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]    --> src/hashers.rs:137:25
[INFO] [stdout]     |
[INFO] [stdout] 137 |     fn write(&mut self, bytes: &[u8]) {
[INFO] [stdout]     |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) 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 `mvutils` (lib) due to 1 previous error; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7abef93b9251f1c1bcf209d9c770b58b67f355b6aa594b1acb7fab48fada1b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7abef93b9251f1c1bcf209d9c770b58b67f355b6aa594b1acb7fab48fada1b3c", kill_on_drop: false }`
[INFO] [stdout] 7abef93b9251f1c1bcf209d9c770b58b67f355b6aa594b1acb7fab48fada1b3c