[INFO] cloning repository https://github.com/js2xxx/ferroc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/js2xxx/ferroc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjs2xxx%2Fferroc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjs2xxx%2Fferroc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c288ff1a39450a006c56dbb9aa42aefc94cdb932
[INFO] testing js2xxx/ferroc 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%2Fjs2xxx%2Fferroc" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/js2xxx/ferroc
[INFO] finished tweaking git repo https://github.com/js2xxx/ferroc
[INFO] tweaked toml for git repo https://github.com/js2xxx/ferroc written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/js2xxx/ferroc 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/js2xxx/ferroc 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 5ceae214216be1500c74dde4f7b0252eaae2d90cc053b6f6698079565443e0f5
[INFO] running `Command { std: "docker" "start" "-a" "5ceae214216be1500c74dde4f7b0252eaae2d90cc053b6f6698079565443e0f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ceae214216be1500c74dde4f7b0252eaae2d90cc053b6f6698079565443e0f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ceae214216be1500c74dde4f7b0252eaae2d90cc053b6f6698079565443e0f5", kill_on_drop: false }`
[INFO] [stdout] 5ceae214216be1500c74dde4f7b0252eaae2d90cc053b6f6698079565443e0f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ea12a3f6bfc9defd594426c7e4fc6ad62fa4e99dd5118aa1f2ba592a8bc87952
[INFO] running `Command { std: "docker" "start" "-a" "ea12a3f6bfc9defd594426c7e4fc6ad62fa4e99dd5118aa1f2ba592a8bc87952", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling ferroc v1.0.0-pre.4 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling array-macro v2.1.8
[INFO] [stderr]    Compiling errno v0.3.14
[INFO] [stderr]    Compiling memmap2 v0.9.8
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:137:1
[INFO] [stdout]     |
[INFO] [stdout] 137 | #![feature(alloc_layout_extra)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `alloc_layout_extra` has been stable since 1.95.0 and no longer requires an attribute to enable
[INFO] [stdout]    --> src/lib.rs:137:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | #![feature(alloc_layout_extra)]
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `dangling` found for struct `Layout` in the current scope
[INFO] [stdout]    --> src/heap.rs:578:32
[INFO] [stdout]     |
[INFO] [stdout] 578 |             return Some(layout.dangling().cast());
[INFO] [stdout]     |                                ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: there is a method `dangling_ptr` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 578 |             return Some(layout.dangling_ptr().cast());
[INFO] [stdout]     |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ferroc` (lib) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "ea12a3f6bfc9defd594426c7e4fc6ad62fa4e99dd5118aa1f2ba592a8bc87952", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea12a3f6bfc9defd594426c7e4fc6ad62fa4e99dd5118aa1f2ba592a8bc87952", kill_on_drop: false }`
[INFO] [stdout] ea12a3f6bfc9defd594426c7e4fc6ad62fa4e99dd5118aa1f2ba592a8bc87952
