[INFO] fetching crate stackpack 0.1.1...
[INFO] testing stackpack-0.1.1 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate stackpack 0.1.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate stackpack 0.1.1
[INFO] finished tweaking crates.io crate stackpack 0.1.1
[INFO] tweaked toml for crates.io crate stackpack 0.1.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stackpack 0.1.1 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate stackpack 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" "+beta-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 107f3c9cdfb55f0df50f2d75a7ccd39359617bfffb28bed45ea0311532b58e8d
[INFO] running `Command { std: "docker" "start" "-a" "107f3c9cdfb55f0df50f2d75a7ccd39359617bfffb28bed45ea0311532b58e8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "107f3c9cdfb55f0df50f2d75a7ccd39359617bfffb28bed45ea0311532b58e8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "107f3c9cdfb55f0df50f2d75a7ccd39359617bfffb28bed45ea0311532b58e8d", kill_on_drop: false }`
[INFO] [stdout] 107f3c9cdfb55f0df50f2d75a7ccd39359617bfffb28bed45ea0311532b58e8d
[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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60bfa94658ac3b750cd7d2481a9d1a6c6b7a3b3464f9127c689d384258da5eba
[INFO] running `Command { std: "docker" "start" "-a" "60bfa94658ac3b750cd7d2481a9d1a6c6b7a3b3464f9127c689d384258da5eba", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling fenwick v1.0.0
[INFO] [stderr]    Compiling bitbit v0.2.0
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling arcode v0.2.4
[INFO] [stderr]    Compiling voxell_rng v0.5.0
[INFO] [stderr]    Compiling quote v1.0.39
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling derive_fromstr v0.1.0
[INFO] [stderr]    Compiling stackpack v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(array_windows)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ffi::OsStr`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::ffi::OsStr;
[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 import: `algorithms::rle2::Rle2`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use algorithms::rle2::Rle2;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DefaultHasher`
[INFO] [stdout]  --> src/algorithms/re_pair.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     hash::{DefaultHasher, Hasher},
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DecompressionError`
[INFO] [stdout]  --> src/algorithms/re_pair.rs:8:37
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::compressor::{Compressor, DecompressionError, Result};
[INFO] [stdout]   |                                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hasher`
[INFO] [stdout]  --> src/algorithms/re_pair.rs:5:27
[INFO] [stdout]   |
[INFO] [stdout] 5 |     hash::{DefaultHasher, Hasher},
[INFO] [stdout]   |                           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/algorithms/huffman.rs:23:38
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn huffman_encode(&mut self, data: &[u8]) -> Vec<u8> {
[INFO] [stdout]    |                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/algorithms/huffman.rs:27:38
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn huffman_decode(&mut self, data: &[u8]) -> Result<Vec<u8>, DecompressionError> {
[INFO] [stdout]    |                                      ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/algorithms/re_pair.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let mut grammar = Grammar { inner: initial_values };
[INFO] [stdout]    |             ----^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/algorithms/re_pair.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let mut charlist = data.iter().map(|&byte| Symbol::Short(u32::from(byte))).collect::<Vec<_>>();
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grammar`
[INFO] [stdout]   --> src/algorithms/re_pair.rs:61:13
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let mut grammar = Grammar { inner: initial_values };
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_grammar`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `stackpack` (bin "stackpack") due to 1 previous error; 10 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "60bfa94658ac3b750cd7d2481a9d1a6c6b7a3b3464f9127c689d384258da5eba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60bfa94658ac3b750cd7d2481a9d1a6c6b7a3b3464f9127c689d384258da5eba", kill_on_drop: false }`
[INFO] [stdout] 60bfa94658ac3b750cd7d2481a9d1a6c6b7a3b3464f9127c689d384258da5eba
