[INFO] fetching crate wfbuf 0.1.1...
[INFO] testing wfbuf-0.1.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate wfbuf 0.1.1 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate wfbuf 0.1.1
[INFO] finished tweaking crates.io crate wfbuf 0.1.1
[INFO] tweaked toml for crates.io crate wfbuf 0.1.1 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate wfbuf 0.1.1 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 13 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-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7df564237b7b95e103d3e69ec8e52b6339e690440acf1b5f50baf666f6b870a
[INFO] running `Command { std: "docker" "start" "-a" "a7df564237b7b95e103d3e69ec8e52b6339e690440acf1b5f50baf666f6b870a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7df564237b7b95e103d3e69ec8e52b6339e690440acf1b5f50baf666f6b870a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7df564237b7b95e103d3e69ec8e52b6339e690440acf1b5f50baf666f6b870a", kill_on_drop: false }`
[INFO] [stdout] a7df564237b7b95e103d3e69ec8e52b6339e690440acf1b5f50baf666f6b870a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fff4e42060a5158759cd2285c1738daf4bf21d4cc732f62bf3bb7652d5f88066
[INFO] running `Command { std: "docker" "start" "-a" "fff4e42060a5158759cd2285c1738daf4bf21d4cc732f62bf3bb7652d5f88066", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling libc v0.1.12
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling mmap v0.1.1
[INFO] [stderr]    Compiling wfbuf v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected expression, found keyword `in`
[INFO] [stdout]   --> src/lib.rs:89:3
[INFO] [stdout]    |
[INFO] [stdout] 89 |         in MMSHARED { WfBuf::<T>::new() }
[INFO] [stdout]    |         ^^ expected expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved imports `std::ops::Place`, `std::ops::InPlace`, `std::ops::Placer`
[INFO] [stdout]  --> src/lib.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::ops::{Place, InPlace, Placer};
[INFO] [stdout]   |                ^^^^^  ^^^^^^^  ^^^^^^ no `Placer` in `ops`
[INFO] [stdout]   |                |      |
[INFO] [stdout]   |                |      no `InPlace` in `ops`
[INFO] [stdout]   |                no `Place` in `ops`
[INFO] [stdout] 
[INFO] [stdout] 
[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(placement_in_syntax, placement_new_protocol, unique)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `ptr_internals`: use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::ptr::Unique;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `ptr_internals`: use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stdout]   --> src/lib.rs:78:7
[INFO] [stdout]    |
[INFO] [stdout] 78 |     ptr: Unique<T>
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `placement_in_syntax`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(placement_in_syntax, placement_new_protocol, unique)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `placement_new_protocol`
[INFO] [stdout]  --> src/lib.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(placement_in_syntax, placement_new_protocol, unique)]
[INFO] [stdout]   |                                 ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `unique`
[INFO] [stdout]  --> src/lib.rs:1:57
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(placement_in_syntax, placement_new_protocol, unique)]
[INFO] [stdout]   |                                                         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0223]: ambiguous associated type
[INFO] [stdout]    --> src/lib.rs:111:25
[INFO] [stdout]     |
[INFO] [stdout] 111 |     fn make_place(self) -> Self::Place {
[INFO] [stdout]     |                            ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if there were a trait named `Example` with associated type `Place` implemented for `MMSharedSingleton`, you could use the fully-qualified path
[INFO] [stdout]     |
[INFO] [stdout] 111 -     fn make_place(self) -> Self::Place {
[INFO] [stdout] 111 +     fn make_place(self) -> <MMSharedSingleton as Example>::Place {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0223]: ambiguous associated type
[INFO] [stdout]    --> src/lib.rs:133:30
[INFO] [stdout]     |
[INFO] [stdout] 133 |     unsafe fn finalize(self) -> Self::Owner {
[INFO] [stdout]     |                                 ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if there were a trait named `Example` with associated type `Owner` implemented for `WfBufPlace<T>`, you could use the fully-qualified path
[INFO] [stdout]     |
[INFO] [stdout] 133 -     unsafe fn finalize(self) -> Self::Owner {
[INFO] [stdout] 133 +     unsafe fn finalize(self) -> <WfBufPlace<T> as Example>::Owner {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0223, E0432, E0554, E0635, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0223`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wfbuf` (lib) due to 10 previous errors
[INFO] running `Command { std: "docker" "inspect" "fff4e42060a5158759cd2285c1738daf4bf21d4cc732f62bf3bb7652d5f88066", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fff4e42060a5158759cd2285c1738daf4bf21d4cc732f62bf3bb7652d5f88066", kill_on_drop: false }`
[INFO] [stdout] fff4e42060a5158759cd2285c1738daf4bf21d4cc732f62bf3bb7652d5f88066
