[INFO] fetching crate unsized-vec 0.0.2-alpha.13...
[INFO] testing unsized-vec-0.0.2-alpha.13 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate unsized-vec 0.0.2-alpha.13 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate unsized-vec 0.0.2-alpha.13
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate unsized-vec 0.0.2-alpha.13
[INFO] tweaked toml for crates.io crate unsized-vec 0.0.2-alpha.13 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate unsized-vec 0.0.2-alpha.13 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 unsized-vec 0.0.2-alpha.13 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 37aec1a1b464a01a275e7b7d151766091bd4663a3535bd378d21c61d49bbca9d
[INFO] running `Command { std: "docker" "start" "-a" "37aec1a1b464a01a275e7b7d151766091bd4663a3535bd378d21c61d49bbca9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37aec1a1b464a01a275e7b7d151766091bd4663a3535bd378d21c61d49bbca9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37aec1a1b464a01a275e7b7d151766091bd4663a3535bd378d21c61d49bbca9d", kill_on_drop: false }`
[INFO] [stdout] 37aec1a1b464a01a275e7b7d151766091bd4663a3535bd378d21c61d49bbca9d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 85f84cca257df32d5e92788d69fb3352c35e25b4302e13c5301427f68468fdbe
[INFO] running `Command { std: "docker" "start" "-a" "85f84cca257df32d5e92788d69fb3352c35e25b4302e13c5301427f68468fdbe", kill_on_drop: false }`
[INFO] [stderr]    Compiling emplacable v0.1.0-alpha.16
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/emplacable-0.1.0-alpha.16/src/lib.rs:74:1
[INFO] [stdout]    |
[INFO] [stdout] 74 | / #![feature(
[INFO] [stdout] 75 | |     allocator_api,
[INFO] [stdout] 76 | |     closure_lifetime_binder,
[INFO] [stdout] 77 | |     forget_unsized,
[INFO] [stdout] ...  |
[INFO] [stdout] 83 | |     unsized_fn_params
[INFO] [stdout] 84 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unconstrained opaque type
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/emplacable-0.1.0-alpha.16/src/lib.rs:309:56
[INFO] [stdout]     |
[INFO] [stdout] 309 |     pub type WithEmplacableForFn<'a, T: ?Sized + 'a> = impl EmplacableFn<T> + 'a;
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `WithEmplacableForFn` must be used in combination with a concrete type within the same crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/emplacable-0.1.0-alpha.16/src/lib.rs:312:9
[INFO] [stdout]     |
[INFO] [stdout] 309 |       pub type WithEmplacableForFn<'a, T: ?Sized + 'a> = impl EmplacableFn<T> + 'a;
[INFO] [stdout]     |                                                          ------------------------- the expected opaque type
[INFO] [stdout] 310 |
[INFO] [stdout] 311 |       pub fn with_emplacable_closure<T: ?Sized>(val: &mut T) -> WithEmplacableForFn<'_, T> {
[INFO] [stdout]     |                                                                 -------------------------- expected `WithEmplacableForFn<'_, T>` because of return type
[INFO] [stdout] 312 | /         move |emplacer: &mut Emplacer<'_, T>| {
[INFO] [stdout] 313 | |             let layout = Layout::for_value(val);
[INFO] [stdout] 314 | |             let metadata = ptr::metadata(val);
[INFO] [stdout] ...   |
[INFO] [stdout] 333 | |             });
[INFO] [stdout] 334 | |         }
[INFO] [stdout]     | |_________^ expected opaque type, found closure
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected opaque type `WithEmplacableForFn<'_, T>`
[INFO] [stdout]                    found closure `{closure@/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/emplacable-0.1.0-alpha.16/src/lib.rs:312:9: 312:46}`
[INFO] [stdout] note: this item must have a `#[define_opaque(WithEmplacableForFn)]` attribute to be able to define hidden types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/emplacable-0.1.0-alpha.16/src/lib.rs:311:12
[INFO] [stdout]     |
[INFO] [stdout] 311 |     pub fn with_emplacable_closure<T: ?Sized>(val: &mut T) -> WithEmplacableForFn<'_, T> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `emplacable` (lib) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "85f84cca257df32d5e92788d69fb3352c35e25b4302e13c5301427f68468fdbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85f84cca257df32d5e92788d69fb3352c35e25b4302e13c5301427f68468fdbe", kill_on_drop: false }`
[INFO] [stdout] 85f84cca257df32d5e92788d69fb3352c35e25b4302e13c5301427f68468fdbe