[INFO] fetching crate muchin 0.1.0...
[INFO] testing muchin-0.1.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate muchin 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate muchin 0.1.0
[INFO] finished tweaking crates.io crate muchin 0.1.0
[INFO] tweaked toml for crates.io crate muchin 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate muchin 0.1.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate muchin 0.1.0 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-2025-10-28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f83053b623b15e79f2278d1d427029240bdaebdc951e478320307ba1160dcd19
[INFO] running `Command { std: "docker" "start" "-a" "f83053b623b15e79f2278d1d427029240bdaebdc951e478320307ba1160dcd19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f83053b623b15e79f2278d1d427029240bdaebdc951e478320307ba1160dcd19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f83053b623b15e79f2278d1d427029240bdaebdc951e478320307ba1160dcd19", kill_on_drop: false }`
[INFO] [stdout] f83053b623b15e79f2278d1d427029240bdaebdc951e478320307ba1160dcd19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd5d3c19049e676019a0c21f16f1d67ba1f284977d676e4e55b080ef84e51d6c
[INFO] running `Command { std: "docker" "start" "-a" "fd5d3c19049e676019a0c21f16f1d67ba1f284977d676e4e55b080ef84e51d6c", kill_on_drop: false }`
[INFO] [stderr]    Compiling zerocopy v0.8.17
[INFO] [stderr]    Compiling getrandom v0.3.1
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling linkme-impl v0.3.31
[INFO] [stderr]    Compiling log v0.4.25
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling anstream v0.6.18
[INFO] [stderr]    Compiling mio v1.0.3
[INFO] [stderr]    Compiling uuid v1.13.1
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling serde_derive v1.0.217
[INFO] [stderr]    Compiling gensym v0.1.1
[INFO] [stderr]    Compiling muchin_model_state_derive v0.1.0
[INFO] [stderr]    Compiling rand_core v0.9.0
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling linkme v0.3.31
[INFO] [stderr]    Compiling type-uuid-derive v0.1.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling type-uuid v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.0
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling env_filter v0.1.3
[INFO] [stderr]    Compiling env_logger v0.11.6
[INFO] [stderr]    Compiling serde v1.0.217
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling muchin 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(generic_const_exprs)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generic_const_exprs)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `muchin` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "fd5d3c19049e676019a0c21f16f1d67ba1f284977d676e4e55b080ef84e51d6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd5d3c19049e676019a0c21f16f1d67ba1f284977d676e4e55b080ef84e51d6c", kill_on_drop: false }`
[INFO] [stdout] fd5d3c19049e676019a0c21f16f1d67ba1f284977d676e4e55b080ef84e51d6c
