[INFO] fetching crate thunk 0.3.0...
[INFO] testing thunk-0.3.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate thunk 0.3.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate thunk 0.3.0
[INFO] finished tweaking crates.io crate thunk 0.3.0
[INFO] tweaked toml for crates.io crate thunk 0.3.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate thunk 0.3.0 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] [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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 8be7240e20a8bc51134708a57345639b34444f3f086bfee54523476d1f3381f7
[INFO] running `Command { std: "docker" "start" "-a" "8be7240e20a8bc51134708a57345639b34444f3f086bfee54523476d1f3381f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8be7240e20a8bc51134708a57345639b34444f3f086bfee54523476d1f3381f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8be7240e20a8bc51134708a57345639b34444f3f086bfee54523476d1f3381f7", kill_on_drop: false }`
[INFO] [stdout] 8be7240e20a8bc51134708a57345639b34444f3f086bfee54523476d1f3381f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 063d259391f430fc3e71786047b7c8cacc93f20ec6c1617a630349e7aff5fb7d
[INFO] running `Command { std: "docker" "start" "-a" "063d259391f430fc3e71786047b7c8cacc93f20ec6c1617a630349e7aff5fb7d", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling thunk v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> src/lib.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(untagged_unions)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: removed in 1.64.0; see <https://github.com/rust-lang/rust/pull/97995> for more information
[INFO] [stdout]    = note: unions with `Copy` and `ManuallyDrop` fields are stable; there is no intent to stabilize more
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::boxed::FnBox`
[INFO] [stdout]  --> src/sync.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::boxed::FnBox;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::boxed::FnBox`
[INFO] [stdout]  --> src/unsync.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::boxed::FnBox;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![feature(fnbox)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(untagged_unions)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `unions_with_drop_fields`
[INFO] [stdout]   --> src/sync.rs:64:9
[INFO] [stdout]    |
[INFO] [stdout] 64 | #[allow(unions_with_drop_fields)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync.rs:260:13
[INFO] [stdout]     |
[INFO] [stdout] 260 |             /// If the `AtomicThunk` is evaluated, do nothing.
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 261 |             THUNK_EVALUATED => {}
[INFO] [stdout]     |             --------------------- rustdoc does not generate documentation for match arms
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync.rs:263:13
[INFO] [stdout]     |
[INFO] [stdout] 263 | /             /// If the `AtomicThunk` is `LOCKING` or `LOCKED`, wait until the thunk is
[INFO] [stdout] 264 | |             /// done evaluating and then return a reference to the inner value.
[INFO] [stdout]     | |_______________________________________________________________________________^
[INFO] [stdout] 265 |               THUNK_LOCKING | THUNK_LOCKED => unsafe { self.besiege() },
[INFO] [stdout]     |               --------------------------------------------------------- rustdoc does not generate documentation for match arms
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/sync.rs:267:13
[INFO] [stdout]     |
[INFO] [stdout] 267 | /             /// Only `THUNK_DEFERRED`, `THUNK_EVALUATED`, `THUNK_LOCKING`, and
[INFO] [stdout] 268 | |             /// `THUNK_LOCKED` are valid values of the flag.
[INFO] [stdout]     | |____________________________________________________________^
[INFO] [stdout] 269 | /             THUNK_INVALIDATED |
[INFO] [stdout] 270 | |             _ => unsafe { unreachable() },
[INFO] [stdout]     | |_________________________________________- rustdoc does not generate documentation for match arms
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `unions_with_drop_fields`
[INFO] [stdout]   --> src/unsync.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 | #[allow(unions_with_drop_fields)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/lib.rs:56:52
[INFO] [stdout]    |
[INFO] [stdout] 56 |     fn defer<'a, F: FnOnce() -> Self::Target + 'a>(F) -> Self where Self::Target: 'a;
[INFO] [stdout]    |                                                    ^ help: try naming the parameter or explicitly ignoring it: `_: F`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]    = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `fnbox`
[INFO] [stdout]   --> src/lib.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![feature(fnbox)]
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
[INFO] [stdout]   --> src/sync.rs:66:5
[INFO] [stdout]    |
[INFO] [stdout] 66 |     deferred: Box<FnBox() -> ()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
[INFO] [stdout] help: wrap the field type in `ManuallyDrop<...>`
[INFO] [stdout]    |
[INFO] [stdout] 66 |     deferred: std::mem::ManuallyDrop<Box<FnBox() -> ()>>,
[INFO] [stdout]    |               +++++++++++++++++++++++                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
[INFO] [stdout]   --> src/unsync.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 |     deferred: Box<FnBox() -> ()>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
[INFO] [stdout] help: wrap the field type in `ManuallyDrop<...>`
[INFO] [stdout]    |
[INFO] [stdout] 38 |     deferred: std::mem::ManuallyDrop<Box<FnBox() -> ()>>,
[INFO] [stdout]    |               +++++++++++++++++++++++                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0557, E0635, E0740.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `thunk` (lib) due to 8 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "063d259391f430fc3e71786047b7c8cacc93f20ec6c1617a630349e7aff5fb7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "063d259391f430fc3e71786047b7c8cacc93f20ec6c1617a630349e7aff5fb7d", kill_on_drop: false }`
[INFO] [stdout] 063d259391f430fc3e71786047b7c8cacc93f20ec6c1617a630349e7aff5fb7d
