[INFO] fetching crate quik-core 0.0.8...
[INFO] testing quik-core-0.0.8 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate quik-core 0.0.8 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate quik-core 0.0.8
[INFO] finished tweaking crates.io crate quik-core 0.0.8
[INFO] tweaked toml for crates.io crate quik-core 0.0.8 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate quik-core 0.0.8 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] ea1f715c61a7811c8a427138e73fcf3cc748cd82ccd18a90363bbfcf03b80b87
[INFO] running `Command { std: "docker" "start" "-a" "ea1f715c61a7811c8a427138e73fcf3cc748cd82ccd18a90363bbfcf03b80b87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea1f715c61a7811c8a427138e73fcf3cc748cd82ccd18a90363bbfcf03b80b87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea1f715c61a7811c8a427138e73fcf3cc748cd82ccd18a90363bbfcf03b80b87", kill_on_drop: false }`
[INFO] [stdout] ea1f715c61a7811c8a427138e73fcf3cc748cd82ccd18a90363bbfcf03b80b87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f8981c41292ef116fdac29622d5c8682309c6817ade298a184dc45711dcddab8
[INFO] running `Command { std: "docker" "start" "-a" "f8981c41292ef116fdac29622d5c8682309c6817ade298a184dc45711dcddab8", kill_on_drop: false }`
[INFO] [stderr]    Compiling quik-util v0.0.8
[INFO] [stderr]    Compiling quik-core v0.0.8 (/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(slice_as_chunks)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `slice_as_chunks` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_as_chunks)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `length`
[INFO] [stdout]    --> src/packet.rs:126:25
[INFO] [stdout]     |
[INFO] [stdout] 126 |                     let length = VarInt::parse(&mut data)?; // TODO use this
[INFO] [stdout]     |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_length`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `length`
[INFO] [stdout]    --> src/packet.rs:145:25
[INFO] [stdout]     |
[INFO] [stdout] 145 |                     let length = VarInt::parse(&mut data)?; // TODO use this
[INFO] [stdout]     |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_length`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `length`
[INFO] [stdout]    --> src/packet.rs:161:25
[INFO] [stdout]     |
[INFO] [stdout] 161 |                     let length = VarInt::parse(&mut data)?; // TODO use this
[INFO] [stdout]     |                         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_length`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/transport.rs:23:24
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn send(&self, data: &[u8]) {
[INFO] [stdout]    |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `quik-core` (lib) due to 1 previous error; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "f8981c41292ef116fdac29622d5c8682309c6817ade298a184dc45711dcddab8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8981c41292ef116fdac29622d5c8682309c6817ade298a184dc45711dcddab8", kill_on_drop: false }`
[INFO] [stdout] f8981c41292ef116fdac29622d5c8682309c6817ade298a184dc45711dcddab8
