[INFO] fetching crate revent 0.29.0...
[INFO] testing revent-0.29.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate revent 0.29.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate revent 0.29.0
[INFO] finished tweaking crates.io crate revent 0.29.0
[INFO] tweaked toml for crates.io crate revent 0.29.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate revent 0.29.0 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 revent 0.29.0 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" "+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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 92be248711978013b9198ca24bf5a8190fd538a52616fc91a47f44fd5a88d0e5
[INFO] running `Command { std: "docker" "start" "-a" "92be248711978013b9198ca24bf5a8190fd538a52616fc91a47f44fd5a88d0e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92be248711978013b9198ca24bf5a8190fd538a52616fc91a47f44fd5a88d0e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92be248711978013b9198ca24bf5a8190fd538a52616fc91a47f44fd5a88d0e5", kill_on_drop: false }`
[INFO] [stdout] 92be248711978013b9198ca24bf5a8190fd538a52616fc91a47f44fd5a88d0e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 391b4a65f3118270c88f40dd16e317bd6e88f8c71765871297eb938e318ccaeb
[INFO] running `Command { std: "docker" "start" "-a" "391b4a65f3118270c88f40dd16e317bd6e88f8c71765871297eb938e318ccaeb", kill_on_drop: false }`
[INFO] [stderr]    Compiling isize-vec v0.1.1
[INFO] [stderr]    Compiling revent v0.29.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:63:1
[INFO] [stdout]    |
[INFO] [stdout] 63 | #![feature(coerce_unsized, drain_filter, unsize)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]   --> src/node.rs:48:19
[INFO] [stdout]    |
[INFO] [stdout] 48 |             size: mem::size_of::<T>(),
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     unused_qualifications
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]    |
[INFO] [stdout] 48 -             size: mem::size_of::<T>(),
[INFO] [stdout] 48 +             size: size_of::<T>(),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]   --> src/node.rs:63:19
[INFO] [stdout]    |
[INFO] [stdout] 63 |             size: mem::size_of::<T>(),
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]    |
[INFO] [stdout] 63 -             size: mem::size_of::<T>(),
[INFO] [stdout] 63 +             size: size_of::<T>(),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary qualification
[INFO] [stdout]    --> src/lib.rs:147:51
[INFO] [stdout]     |
[INFO] [stdout] 147 |         if last.1 != item as *mut () || last.2 != mem::size_of::<Self>() {
[INFO] [stdout]     |                                                   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: remove the unnecessary path segments
[INFO] [stdout]     |
[INFO] [stdout] 147 -         if last.1 != item as *mut () || last.2 != mem::size_of::<Self>() {
[INFO] [stdout] 147 +         if last.1 != item as *mut () || last.2 != size_of::<Self>() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]   --> src/lib.rs:63:28
[INFO] [stdout]    |
[INFO] [stdout] 63 | #![feature(coerce_unsized, drain_filter, unsize)]
[INFO] [stdout]    |                            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `(Cell<isize>, UnsafeCell<T>): Unsize<(Cell<isize>, UnsafeCell<U>)>` is not satisfied
[INFO] [stdout]   --> src/node.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | / impl<T, U> CoerceUnsized<Node<U>> for Node<T>
[INFO] [stdout] 26 | | where
[INFO] [stdout] 27 | |     T: Unsize<U> + ?Sized,
[INFO] [stdout] 28 | |     U: ?Sized,
[INFO] [stdout]    | |______________^ the trait `Unsize<(Cell<isize>, UnsafeCell<U>)>` is not implemented for `(Cell<isize>, UnsafeCell<T>)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: all implementations of `Unsize` are provided automatically by the compiler, see <https://doc.rust-lang.org/stable/std/marker/trait.Unsize.html> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `revent` (lib) due to 3 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "391b4a65f3118270c88f40dd16e317bd6e88f8c71765871297eb938e318ccaeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "391b4a65f3118270c88f40dd16e317bd6e88f8c71765871297eb938e318ccaeb", kill_on_drop: false }`
[INFO] [stdout] 391b4a65f3118270c88f40dd16e317bd6e88f8c71765871297eb938e318ccaeb