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[INFO] [stdout] 5ae30ea36a0a9e02264927638a9cd239c2f4be3b
[INFO] checking chrisz2zz/rust-concurrency-cookbook-code against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchrisz2zz%2Frust-concurrency-cookbook-code" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
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[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/chrisz2zz/rust-concurrency-cookbook-code on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/chrisz2zz/rust-concurrency-cookbook-code already has a lockfile, it will not be regenerated
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[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] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> chapter_04_container_sync_primitive/examples/cell.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(lazy_cell)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> chapter_04_container_sync_primitive/examples/box.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(new_uninit)]
[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: `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] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chapter_04_container_sync_primitive` (example "cell") due to 1 previous error; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chapter_04_container_sync_primitive` (example "box") due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "128f7a72b1f4a250d3157fd95102afbd0b5aac95ee33965bf5461b77965f10f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "128f7a72b1f4a250d3157fd95102afbd0b5aac95ee33965bf5461b77965f10f0", kill_on_drop: false }`
[INFO] [stdout] 128f7a72b1f4a250d3157fd95102afbd0b5aac95ee33965bf5461b77965f10f0
