[INFO] fetching crate eko-gc 0.0.2...
[INFO] testing eko-gc-0.0.2 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate eko-gc 0.0.2 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate eko-gc 0.0.2
[INFO] finished tweaking crates.io crate eko-gc 0.0.2
[INFO] tweaked toml for crates.io crate eko-gc 0.0.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate eko-gc 0.0.2 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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] 999c3d00d55fc6fb1b86b63e9ef933dbb7920e63a2dd5ddfe337ca7d2fa25f73
[INFO] running `Command { std: "docker" "start" "-a" "999c3d00d55fc6fb1b86b63e9ef933dbb7920e63a2dd5ddfe337ca7d2fa25f73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "999c3d00d55fc6fb1b86b63e9ef933dbb7920e63a2dd5ddfe337ca7d2fa25f73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "999c3d00d55fc6fb1b86b63e9ef933dbb7920e63a2dd5ddfe337ca7d2fa25f73", kill_on_drop: false }`
[INFO] [stdout] 999c3d00d55fc6fb1b86b63e9ef933dbb7920e63a2dd5ddfe337ca7d2fa25f73
[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] d535fa3d362496538aa03351b9e8d1c4ee2d7ee1f5ed0292288c21348e831aa4
[INFO] running `Command { std: "docker" "start" "-a" "d535fa3d362496538aa03351b9e8d1c4ee2d7ee1f5ed0292288c21348e831aa4", kill_on_drop: false }`
[INFO] [stderr]    Compiling eko-gc v0.0.2 (/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(dropck_eyepatch)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_arena.rs:42:47
[INFO] [stdout]    |
[INFO] [stdout] 42 |   pub(crate) boxes: Option<NonNull<GcBox<'gc, Trace>>>,
[INFO] [stdout]    |                                               ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 42 |   pub(crate) boxes: Option<NonNull<GcBox<'gc, dyn Trace>>>,
[INFO] [stdout]    |                                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_box.rs:22:46
[INFO] [stdout]    |
[INFO] [stdout] 22 |   pub(crate) next: Option<NonNull<GcBox<'gc, Trace>>>,
[INFO] [stdout]    |                                              ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 22 |   pub(crate) next: Option<NonNull<GcBox<'gc, dyn Trace>>>,
[INFO] [stdout]    |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_arena.rs:74:28
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let gc_box: &GcBox<Trace> = unsafe { gc_box_ptr.as_ref() };
[INFO] [stdout]    |                            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let gc_box: &GcBox<dyn Trace> = unsafe { gc_box_ptr.as_ref() };
[INFO] [stdout]    |                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/gc_arena.rs:82:38
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let mut unmarked: Vec<*mut GcBox<Trace>> = Vec::new();
[INFO] [stdout]    |                                      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let mut unmarked: Vec<*mut GcBox<dyn Trace>> = Vec::new();
[INFO] [stdout]    |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `eko-gc` (lib) due to 1 previous error; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d535fa3d362496538aa03351b9e8d1c4ee2d7ee1f5ed0292288c21348e831aa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d535fa3d362496538aa03351b9e8d1c4ee2d7ee1f5ed0292288c21348e831aa4", kill_on_drop: false }`
[INFO] [stdout] d535fa3d362496538aa03351b9e8d1c4ee2d7ee1f5ed0292288c21348e831aa4
