[INFO] fetching crate stakker 0.2.10...
[INFO] checking stakker-0.2.10 against nightly-2024-02-05 for check-cfg-2
[INFO] extracting crate stakker 0.2.10 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate stakker 0.2.10 on toolchain nightly-2024-02-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stakker 0.2.10
[INFO] finished tweaking crates.io crate stakker 0.2.10
[INFO] tweaked toml for crates.io crate stakker 0.2.10 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate stakker 0.2.10 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" "+nightly-2024-02-05" "fetch" "--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]  Downloading crates ...
[INFO] [stderr]   Downloaded rustversion v1.0.13
[INFO] [stderr]   Downloaded log v0.4.19
[INFO] [stderr]   Downloaded windows-targets v0.48.1
[INFO] [stderr]   Downloaded pin-project-lite v0.2.10
[INFO] [stderr]   Downloaded proc-macro2 v1.0.64
[INFO] [stderr]   Downloaded quote v1.0.29
[INFO] [stderr]   Downloaded syn v2.0.25
[INFO] [stderr]   Downloaded aho-corasick v1.0.2
[INFO] [stderr]   Downloaded regex v1.9.1
[INFO] [stderr]   Downloaded tracing-subscriber v0.3.17
[INFO] [stderr]   Downloaded regex-automata v0.3.3
[INFO] [stderr]   Downloaded unicode-ident v1.0.10
[INFO] [stderr]   Downloaded exclusion-set v0.1.2
[INFO] [stderr]   Downloaded qcell v0.5.4
[INFO] [stderr]   Downloaded cc v1.0.79
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+nightly-2024-02-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb7ea781151ffed4ec44c999d7688759541bc3ca198dc5ccd855dfddac7ac0f5
[INFO] running `Command { std: "docker" "start" "-a" "bb7ea781151ffed4ec44c999d7688759541bc3ca198dc5ccd855dfddac7ac0f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb7ea781151ffed4ec44c999d7688759541bc3ca198dc5ccd855dfddac7ac0f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb7ea781151ffed4ec44c999d7688759541bc3ca198dc5ccd855dfddac7ac0f5", kill_on_drop: false }`
[INFO] [stdout] bb7ea781151ffed4ec44c999d7688759541bc3ca198dc5ccd855dfddac7ac0f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "+nightly-2024-02-05" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f760c563898146495845f95fc5f5cbebf529ffaa63939c505c5254439c0e753a
[INFO] running `Command { std: "docker" "start" "-a" "f760c563898146495845f95fc5f5cbebf529ffaa63939c505c5254439c0e753a", kill_on_drop: false }`
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]     Checking qcell v0.5.4
[INFO] [stderr]     Checking stakker v0.2.10 (/opt/rustwide/workdir)
[INFO] [stdout] warning: mutable reference of mutable static is discouraged
[INFO] [stdout]   --> src/deferrer/global.rs:86:31
[INFO] [stdout]    |
[INFO] [stdout] 86 |         unsafe { mem::replace(&mut TASK, task) }
[INFO] [stdout]    |                               ^^^^^^^^^ mutable reference of mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, see issue #114447 <https://github.com/rust-lang/rust/issues/114447>
[INFO] [stdout]    = note: reference of mutable static is a hard error from 2024 edition
[INFO] [stdout]    = note: mutable statics can be written to by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stdout]    = note: `#[warn(static_mut_ref)]` on by default
[INFO] [stdout] help: mutable references are dangerous since if there's any other pointer or reference used for that static while the reference lives, that's UB; use `addr_of_mut!` instead to create a raw pointer
[INFO] [stdout]    |
[INFO] [stdout] 86 |         unsafe { mem::replace(addr_of_mut!(TASK), task) }
[INFO] [stdout]    |                               ~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/actor.rs:186:25
[INFO] [stdout]     |
[INFO] [stdout] 186 | pub struct ActorOwnAnon(Box<dyn ActorOwnAnonTrait>);
[INFO] [stdout]     |            ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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] 186 | pub struct ActorOwnAnon(());
[INFO] [stdout]     |                         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: mutable reference of mutable static is discouraged
[INFO] [stdout]   --> src/deferrer/global.rs:86:31
[INFO] [stdout]    |
[INFO] [stdout] 86 |         unsafe { mem::replace(&mut TASK, task) }
[INFO] [stdout]    |                               ^^^^^^^^^ mutable reference of mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, see issue #114447 <https://github.com/rust-lang/rust/issues/114447>
[INFO] [stdout]    = note: reference of mutable static is a hard error from 2024 edition
[INFO] [stdout]    = note: mutable statics can be written to by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stdout]    = note: `#[warn(static_mut_ref)]` on by default
[INFO] [stdout] help: mutable references are dangerous since if there's any other pointer or reference used for that static while the reference lives, that's UB; use `addr_of_mut!` instead to create a raw pointer
[INFO] [stdout]    |
[INFO] [stdout] 86 |         unsafe { mem::replace(addr_of_mut!(TASK), task) }
[INFO] [stdout]    |                               ~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/actor.rs:186:25
[INFO] [stdout]     |
[INFO] [stdout] 186 | pub struct ActorOwnAnon(Box<dyn ActorOwnAnonTrait>);
[INFO] [stdout]     |            ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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] 186 | pub struct ActorOwnAnon(());
[INFO] [stdout]     |                         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/test/memsizes.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Actor1000([u8; 1000]);
[INFO] [stdout]    |        --------- ^^^^^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[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] 10 | struct Actor1000(());
[INFO] [stdout]    |                  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/test/memsizes.rs:11:18
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Actor2000([u8; 2000]);
[INFO] [stdout]    |        --------- ^^^^^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[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] 11 | struct Actor2000(());
[INFO] [stdout]    |                  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.75s
[INFO] running `Command { std: "docker" "inspect" "f760c563898146495845f95fc5f5cbebf529ffaa63939c505c5254439c0e753a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f760c563898146495845f95fc5f5cbebf529ffaa63939c505c5254439c0e753a", kill_on_drop: false }`
[INFO] [stdout] f760c563898146495845f95fc5f5cbebf529ffaa63939c505c5254439c0e753a
[INFO] checking stakker-0.2.10 against nightly-2024-02-05+rustflags=-Dunexpected_cfgs+cargoflags=-Zcheck-cfg for check-cfg-2
[INFO] extracting crate stakker 0.2.10 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate stakker 0.2.10 on toolchain nightly-2024-02-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stakker 0.2.10
[INFO] finished tweaking crates.io crate stakker 0.2.10
[INFO] tweaked toml for crates.io crate stakker 0.2.10 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate stakker 0.2.10 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" "+nightly-2024-02-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2024-02-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3088ad0d0110b25c2196422ca56a4f78b8e4483bf0c58d2f88104a1597f513f1
[INFO] running `Command { std: "docker" "start" "-a" "3088ad0d0110b25c2196422ca56a4f78b8e4483bf0c58d2f88104a1597f513f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3088ad0d0110b25c2196422ca56a4f78b8e4483bf0c58d2f88104a1597f513f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3088ad0d0110b25c2196422ca56a4f78b8e4483bf0c58d2f88104a1597f513f1", kill_on_drop: false }`
[INFO] [stdout] 3088ad0d0110b25c2196422ca56a4f78b8e4483bf0c58d2f88104a1597f513f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=forbid -Dunexpected_cfgs" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "+nightly-2024-02-05" "check" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zcheck-cfg", kill_on_drop: false }`
[INFO] [stdout] 8473cad6542105c0257e43e73024f1cf69e5378e03bee2bff8e8dcb1ea600f84
[INFO] running `Command { std: "docker" "start" "-a" "8473cad6542105c0257e43e73024f1cf69e5378e03bee2bff8e8dcb1ea600f84", kill_on_drop: false }`
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]     Checking qcell v0.5.4
[INFO] [stderr]     Checking stakker v0.2.10 (/opt/rustwide/workdir)
[INFO] [stdout] error: unexpected `cfg` condition name: `docsrs`
[INFO] [stdout]    --> src/lib.rs:488:12
[INFO] [stdout]     |
[INFO] [stdout] 488 | #[cfg_attr(docsrs, doc(hidden))]
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
[INFO] [stdout]     = help: consider using a Cargo feature instead or adding `println!("cargo:rustc-check-cfg=cfg(docsrs)");` to the top of a `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration
[INFO] [stdout]     = note: requested on the command line with `-D unexpected-cfgs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unexpected `cfg` condition name: `docsrs`
[INFO] [stdout]    --> src/lib.rs:488:12
[INFO] [stdout]     |
[INFO] [stdout] 488 | #[cfg_attr(docsrs, doc(hidden))]
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `debug_assertions`, `doc`, `doctest`, `feature`, `miri`, `overflow_checks`, `panic`, `proc_macro`, `relocation_model`, `sanitize`, `sanitizer_cfi_generalize_pointers`, `sanitizer_cfi_normalize_integers`, `target_abi`, `target_arch`, `target_endian`, `target_env`, `target_family`, `target_feature`, `target_has_atomic`, `target_has_atomic_equal_alignment`, `target_has_atomic_load_store`, `target_os`, `target_pointer_width`, `target_thread_local`, `target_vendor`, `test`, `unix`, `windows`
[INFO] [stdout]     = help: consider using a Cargo feature instead or adding `println!("cargo:rustc-check-cfg=cfg(docsrs)");` to the top of a `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#check-cfg> for more information about checking conditional configuration
[INFO] [stdout]     = note: requested on the command line with `-D unexpected-cfgs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: mutable reference of mutable static is discouraged
[INFO] [stdout]   --> src/deferrer/global.rs:86:31
[INFO] [stdout]    |
[INFO] [stdout] 86 |         unsafe { mem::replace(&mut TASK, task) }
[INFO] [stdout]    |                               ^^^^^^^^^ mutable reference of mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, see issue #114447 <https://github.com/rust-lang/rust/issues/114447>
[INFO] [stdout]    = note: reference of mutable static is a hard error from 2024 edition
[INFO] [stdout]    = note: mutable statics can be written to by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stdout]    = note: `#[warn(static_mut_ref)]` on by default
[INFO] [stdout] help: mutable references are dangerous since if there's any other pointer or reference used for that static while the reference lives, that's UB; use `addr_of_mut!` instead to create a raw pointer
[INFO] [stdout]    |
[INFO] [stdout] 86 |         unsafe { mem::replace(addr_of_mut!(TASK), task) }
[INFO] [stdout]    |                               ~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/actor.rs:186:25
[INFO] [stdout]     |
[INFO] [stdout] 186 | pub struct ActorOwnAnon(Box<dyn ActorOwnAnonTrait>);
[INFO] [stdout]     |            ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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] 186 | pub struct ActorOwnAnon(());
[INFO] [stdout]     |                         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `stakker` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: mutable reference of mutable static is discouraged
[INFO] [stdout]   --> src/deferrer/global.rs:86:31
[INFO] [stdout]    |
[INFO] [stdout] 86 |         unsafe { mem::replace(&mut TASK, task) }
[INFO] [stdout]    |                               ^^^^^^^^^ mutable reference of mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: for more information, see issue #114447 <https://github.com/rust-lang/rust/issues/114447>
[INFO] [stdout]    = note: reference of mutable static is a hard error from 2024 edition
[INFO] [stdout]    = note: mutable statics can be written to by multiple threads: aliasing violations or data races will cause undefined behavior
[INFO] [stdout]    = note: `#[warn(static_mut_ref)]` on by default
[INFO] [stdout] help: mutable references are dangerous since if there's any other pointer or reference used for that static while the reference lives, that's UB; use `addr_of_mut!` instead to create a raw pointer
[INFO] [stdout]    |
[INFO] [stdout] 86 |         unsafe { mem::replace(addr_of_mut!(TASK), task) }
[INFO] [stdout]    |                               ~~~~~~~~~~~~~~~~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/actor.rs:186:25
[INFO] [stdout]     |
[INFO] [stdout] 186 | pub struct ActorOwnAnon(Box<dyn ActorOwnAnonTrait>);
[INFO] [stdout]     |            ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` 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] 186 | pub struct ActorOwnAnon(());
[INFO] [stdout]     |                         ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/test/memsizes.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Actor1000([u8; 1000]);
[INFO] [stdout]    |        --------- ^^^^^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[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] 10 | struct Actor1000(());
[INFO] [stdout]    |                  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/test/memsizes.rs:11:18
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Actor2000([u8; 2000]);
[INFO] [stdout]    |        --------- ^^^^^^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[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] 11 | struct Actor2000(());
[INFO] [stdout]    |                  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `stakker` (lib test) due to 2 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "8473cad6542105c0257e43e73024f1cf69e5378e03bee2bff8e8dcb1ea600f84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8473cad6542105c0257e43e73024f1cf69e5378e03bee2bff8e8dcb1ea600f84", kill_on_drop: false }`
[INFO] [stdout] 8473cad6542105c0257e43e73024f1cf69e5378e03bee2bff8e8dcb1ea600f84
