[INFO] cloning repository https://github.com/Juanperias/micro-core
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Juanperias/micro-core" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJuanperias%2Fmicro-core", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJuanperias%2Fmicro-core'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c3cf086946f8494635de87ff25d727af2ad53f3c
[INFO] testing Juanperias/micro-core against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJuanperias%2Fmicro-core" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/Juanperias/micro-core
[INFO] finished tweaking git repo https://github.com/Juanperias/micro-core
[INFO] tweaked toml for git repo https://github.com/Juanperias/micro-core written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Juanperias/micro-core 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] crate git repo https://github.com/Juanperias/micro-core 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] f2d68ee36f73583c909a79d7a5cfdfa1568600ffa07b2b4ebe23225fea87bba8
[INFO] running `Command { std: "docker" "start" "-a" "f2d68ee36f73583c909a79d7a5cfdfa1568600ffa07b2b4ebe23225fea87bba8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2d68ee36f73583c909a79d7a5cfdfa1568600ffa07b2b4ebe23225fea87bba8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2d68ee36f73583c909a79d7a5cfdfa1568600ffa07b2b4ebe23225fea87bba8", kill_on_drop: false }`
[INFO] [stdout] f2d68ee36f73583c909a79d7a5cfdfa1568600ffa07b2b4ebe23225fea87bba8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 0e4c7951ec8127e7aeed51461bd09ae600776fa7f4e35e15bdbe461fec8612cc
[INFO] running `Command { std: "docker" "start" "-a" "0e4c7951ec8127e7aeed51461bd09ae600776fa7f4e35e15bdbe461fec8612cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling micro_core v0.1.0 (/opt/rustwide/workdir)
[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(no_core)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `lang_items` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(lang_items)]
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `rustc_attrs` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(rustc_attrs)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `allow_internal_unstable` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(allow_internal_unstable)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `bootstrap`
[INFO] [stdout]  --> src/arch/asm.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[cfg(not(bootstrap))]
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]   = help: consider using a Cargo feature instead
[INFO] [stdout]   = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]            [lints.rust]
[INFO] [stdout]            unexpected_cfgs = { level = "warn", check-cfg = ['cfg(bootstrap)'] }
[INFO] [stdout]   = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(bootstrap)");` to the top of the `build.rs`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: requires `meta_sized` lang_item
[INFO] [stdout]  --> src/marker.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait Sized {}
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: requires `meta_sized` lang_item
[INFO] [stdout]  --> src/marker.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub trait Unsize<T: ?Sized> {}
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: requires `meta_sized` lang_item
[INFO] [stdout]   --> src/marker.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub unsafe auto trait Sync {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: requires `meta_sized` lang_item
[INFO] [stdout]   --> src/marker.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait Tuple {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: requires `meta_sized` lang_item
[INFO] [stdout]   --> src/marker.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub trait Copy: Clone {}
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: requires `meta_sized` lang_item
[INFO] [stdout]   --> src/clone/mod.rs:5:1
[INFO] [stdout]    |
[INFO] [stdout]  5 | / pub trait Clone: Sized {
[INFO] [stdout]  6 | |     #[lang = "clone_fn"]
[INFO] [stdout]  7 | |    fn clone(&self) -> Self;
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: requires `meta_sized` lang_item
[INFO] [stdout]  --> src/ops/deref.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub trait LegacyReceiver {}
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: requires `meta_sized` lang_item
[INFO] [stdout]  --> src/ops/bit.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | / pub trait Not {
[INFO] [stdout] 3 | |   type Output;
[INFO] [stdout] 4 | |
[INFO] [stdout] 5 | |   fn not(self) -> Self::Output; 
[INFO] [stdout] 6 | | }
[INFO] [stdout]   | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: requires `meta_sized` lang_item
[INFO] [stdout]  --> src/ptr/mod.rs:6:29
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub unsafe fn drop_in_place<T: ?Sized>(to_place: *mut T) {
[INFO] [stdout]   |                             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `micro_core` (lib) due to 10 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "0e4c7951ec8127e7aeed51461bd09ae600776fa7f4e35e15bdbe461fec8612cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e4c7951ec8127e7aeed51461bd09ae600776fa7f4e35e15bdbe461fec8612cc", kill_on_drop: false }`
[INFO] [stdout] 0e4c7951ec8127e7aeed51461bd09ae600776fa7f4e35e15bdbe461fec8612cc
