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[INFO] [stderr]     Checking chapter_06_concurrency_collection v0.1.0 (/opt/rustwide/workdir/chapter_06_concurrency_collection)
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rustix-0.37.27/src/backend/linux_raw/io/errno.rs:28:25
[INFO] [stdout]    |
[INFO] [stdout] 28 | #[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_start(0xf001))]
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: attributes starting with `rustc` are reserved for use by the `rustc` compiler
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rustix-0.37.27/src/backend/linux_raw/io/errno.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 | #[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_end(0xffff))]
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_layout_scalar_valid_range_start` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rustix-0.37.27/src/backend/linux_raw/io/errno.rs:28:25
[INFO] [stdout]    |
[INFO] [stdout] 28 | #[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_start(0xf001))]
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `rustc_layout_scalar_valid_range_end` in this scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/rustix-0.37.27/src/backend/linux_raw/io/errno.rs:29:25
[INFO] [stdout]    |
[INFO] [stdout] 29 | #[cfg_attr(rustc_attrs, rustc_layout_scalar_valid_range_end(0xffff))]
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `new_uninit` has been stable since 1.82.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> chapter_04_container_sync_primitive/examples/box.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(new_uninit)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `boxed`
[INFO] [stdout]  --> chapter_04_container_sync_primitive/examples/box.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let boxed = Box::new(val);
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_boxed`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/box.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let val = *boxed;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/box.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Cons(T, Box<List<T>>),
[INFO] [stdout]    |     ----    ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 -     Cons(T, Box<List<T>>),
[INFO] [stdout] 18 +     Cons(T, ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking event-listener-strategy v0.4.0
[INFO] [stdout] warning: the feature `lazy_cell` has been stable since 1.80.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> chapter_04_container_sync_primitive/examples/cell.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(lazy_cell)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reference1`
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/cell.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |     let reference1 = Rc::clone(&data);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reference2`
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/cell.rs:86:9
[INFO] [stdout]    |
[INFO] [stdout] 86 |     let reference2 = Rc::clone(&data);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ss1`
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/cell.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 89 |     let ss1 = &ss;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ss1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ss2`
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/cell.rs:90:9
[INFO] [stdout]    |
[INFO] [stdout] 90 |     let ss2 = &ss;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ss2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rc` is never used
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/cell.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn rc() {
[INFO] [stdout]    |    ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking crossbeam v0.8.3
[INFO] [stderr]     Checking scheduled-thread-pool v0.2.7
[INFO] [stderr]     Checking threadpool-executor v0.3.2
[INFO] [stdout] warning: unused variable: `reference1`
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/rc.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let reference1 = Rc::clone(&data);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reference2`
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/rc.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let reference2 = Rc::clone(&data);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reference2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ss1`
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/rc.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let ss1 = &ss;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ss1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ss2`
[INFO] [stdout]   --> chapter_04_container_sync_primitive/examples/rc.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let ss2 = &ss;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_ss2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking async-lock v3.3.0
[INFO] [stderr]     Checking async-channel v2.1.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rayon v1.8.0
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot v0.5.5
[INFO] [stderr]     Checking crossbeam-channel v0.1.3
[INFO] [stderr]     Checking blocking v1.5.1
[INFO] [stderr]     Checking async-executor v1.8.0
[INFO] [stderr]     Checking chapter_05_basic_sync_primitive v0.1.0 (/opt/rustwide/workdir/chapter_05_basic_sync_primitive)
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> chapter_05_basic_sync_primitive/examples/once.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 |     unsafe { GLOBAL_CONFIG.as_ref().unwrap() }
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cell::RefCell`
[INFO] [stdout]  --> chapter_05_basic_sync_primitive/examples/arc.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     cell::RefCell,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking async-fs v2.1.0
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking mxo_env_logger v0.1.0
[INFO] [stderr]     Checking poolite v0.7.1
[INFO] [stderr] error: could not compile `rustix` (lib) due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5b1785e3045b795c83416fede76c2652665e19a188047b4307da0b24c63911b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b1785e3045b795c83416fede76c2652665e19a188047b4307da0b24c63911b4", kill_on_drop: false }`
[INFO] [stdout] 5b1785e3045b795c83416fede76c2652665e19a188047b4307da0b24c63911b4
