[INFO] fetching crate muchin 0.1.0...
[INFO] testing muchin-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate muchin 0.1.0 into /workspace/builds/worker-5-tc1/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-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate muchin 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linkme v0.3.31
[INFO] [stderr]   Downloaded rand_core v0.9.0
[INFO] [stderr]   Downloaded gensym v0.1.1
[INFO] [stderr]   Downloaded linkme-impl v0.3.31
[INFO] [stderr]   Downloaded muchin_model_state_derive v0.1.0
[INFO] [stderr]   Downloaded env_logger v0.11.6
[INFO] [stderr]   Downloaded uuid v1.13.1
[INFO] [stderr]   Downloaded zerocopy v0.8.17
[INFO] [stderr]   Downloaded zerocopy-derive v0.8.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a2d61a4a4aaf073b05f10434fbd96d3a25aed083f8df8f8b5aee8ee3b843f4c
[INFO] running `Command { std: "docker" "start" "-a" "9a2d61a4a4aaf073b05f10434fbd96d3a25aed083f8df8f8b5aee8ee3b843f4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a2d61a4a4aaf073b05f10434fbd96d3a25aed083f8df8f8b5aee8ee3b843f4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a2d61a4a4aaf073b05f10434fbd96d3a25aed083f8df8f8b5aee8ee3b843f4c", kill_on_drop: false }`
[INFO] [stdout] 9a2d61a4a4aaf073b05f10434fbd96d3a25aed083f8df8f8b5aee8ee3b843f4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43de28e9cfd9ab4502f64f3d77dddb4366b30c75ded7d08c8e168d909aedbe18
[INFO] running `Command { std: "docker" "start" "-a" "43de28e9cfd9ab4502f64f3d77dddb4366b30c75ded7d08c8e168d909aedbe18", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.16
[INFO] [stderr]    Compiling zerocopy v0.8.17
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling getrandom v0.3.1
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling linkme-impl v0.3.31
[INFO] [stderr]    Compiling log v0.4.25
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling anstream v0.6.18
[INFO] [stderr]    Compiling mio v1.0.3
[INFO] [stderr]    Compiling colored v3.0.0
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling uuid v1.13.1
[INFO] [stderr]    Compiling rand_core v0.9.0
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling serde_derive v1.0.217
[INFO] [stderr]    Compiling muchin_model_state_derive v0.1.0
[INFO] [stderr]    Compiling gensym v0.1.1
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling env_filter v0.1.3
[INFO] [stderr]    Compiling linkme v0.3.31
[INFO] [stderr]    Compiling env_logger v0.11.6
[INFO] [stderr]    Compiling type-uuid-derive v0.1.2
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling type-uuid v0.1.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.0
[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 stable 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" "43de28e9cfd9ab4502f64f3d77dddb4366b30c75ded7d08c8e168d909aedbe18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43de28e9cfd9ab4502f64f3d77dddb4366b30c75ded7d08c8e168d909aedbe18", kill_on_drop: false }`
[INFO] [stdout] 43de28e9cfd9ab4502f64f3d77dddb4366b30c75ded7d08c8e168d909aedbe18
