[INFO] fetching crate mech-core 0.1.0...
[INFO] documenting mech-core-0.1.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate mech-core 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate mech-core 0.1.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mech-core 0.1.0
[INFO] finished tweaking crates.io crate mech-core 0.1.0
[INFO] tweaked toml for crates.io crate mech-core 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate mech-core 0.1.0 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hashbrown v0.13.1
[INFO] [stderr]   Downloaded rlibc v1.0.0
[INFO] [stderr]   Downloaded ahash v0.8.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 741a7112a312094dabb64823bb15b18a3f12bccecc49e41bb8fc53c8f782a428
[INFO] running `Command { std: "docker" "start" "-a" "741a7112a312094dabb64823bb15b18a3f12bccecc49e41bb8fc53c8f782a428", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "741a7112a312094dabb64823bb15b18a3f12bccecc49e41bb8fc53c8f782a428", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "741a7112a312094dabb64823bb15b18a3f12bccecc49e41bb8fc53c8f782a428", kill_on_drop: false }`
[INFO] [stdout] 741a7112a312094dabb64823bb15b18a3f12bccecc49e41bb8fc53c8f782a428
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc5711a551241f1393231a3c7bce95c78c86a96c34a60336c3413a9e46af978d
[INFO] running `Command { std: "docker" "start" "-a" "fc5711a551241f1393231a3c7bce95c78c86a96c34a60336c3413a9e46af978d", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.13
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling ahash v0.8.2
[INFO] [stderr]    Compiling libm v0.2.6
[INFO] [stderr]    Compiling rayon-core v1.10.1
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]     Checking once_cell v1.17.0
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]     Checking crossbeam-channel v0.5.6
[INFO] [stderr]     Checking time-core v0.1.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.2
[INFO] [stderr]     Checking either v1.8.0
[INFO] [stderr]     Checking hashbrown v0.13.1
[INFO] [stderr]     Checking time v0.3.17
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking seahash v4.1.0
[INFO] [stderr]     Checking rayon v1.6.1
[INFO] [stderr]  Documenting mech-core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking mech-core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(get_mut_unchecked)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(concat_idents)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(iter_intersperse)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(get_mut_unchecked)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(concat_idents)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(iter_intersperse)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `mech-core`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name mech_core src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="parallel"' --cfg 'feature="rayon"' --cfg 'feature="stdlib"' --cfg 'feature="time"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e490d48fdf5e3246 -L dependency=/opt/rustwide/target/debug/deps --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-9e9172934c095cb4.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-cc83717105ac8e29.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-e7445b4e8703c20b.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-d1d0bbf45ab08048.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-703ce78ba7bd0672.rmeta --extern seahash=/opt/rustwide/target/debug/deps/libseahash-a51fa08e77052232.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-a711a56b267634ec.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-f968d7b23dda27cd.so --extern time=/opt/rustwide/target/debug/deps/libtime-d7ae0af490466900.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for struct `Vec<std::rc::Rc<std::cell::RefCell<block::Block>>>` in the current scope
[INFO] [stdout]   --> src/schedule.rs:41:63
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let ready_blocks: Vec<BlockRef> = self.unscheduled_blocks.drain_filter(|b| b.borrow().state == BlockState::Ready).collect();
[INFO] [stdout]    |                                                               ^^^^^^^^^^^^ method not found in `Vec<Rc<RefCell<Block>>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mech-core` (lib) due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "fc5711a551241f1393231a3c7bce95c78c86a96c34a60336c3413a9e46af978d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc5711a551241f1393231a3c7bce95c78c86a96c34a60336c3413a9e46af978d", kill_on_drop: false }`
[INFO] [stdout] fc5711a551241f1393231a3c7bce95c78c86a96c34a60336c3413a9e46af978d
