[INFO] fetching crate mnemos-userspace 0.1.0...
[INFO] testing mnemos-userspace-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate mnemos-userspace 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate mnemos-userspace 0.1.0
[INFO] finished tweaking crates.io crate mnemos-userspace 0.1.0
[INFO] tweaked toml for crates.io crate mnemos-userspace 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mnemos-userspace 0.1.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mnemos-userspace 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-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e59113e292c0816704779e8f6dc991fb54a8d5b25add182a7cc25b58e1452181
[INFO] running `Command { std: "docker" "start" "-a" "e59113e292c0816704779e8f6dc991fb54a8d5b25add182a7cc25b58e1452181", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e59113e292c0816704779e8f6dc991fb54a8d5b25add182a7cc25b58e1452181", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e59113e292c0816704779e8f6dc991fb54a8d5b25add182a7cc25b58e1452181", kill_on_drop: false }`
[INFO] [stdout] e59113e292c0816704779e8f6dc991fb54a8d5b25add182a7cc25b58e1452181
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee675b0be005ae75c0d3f8d97a8cf96e3acdbe3ac1dba6158c527fb6eefd7091
[INFO] running `Command { std: "docker" "start" "-a" "ee675b0be005ae75c0d3f8d97a8cf96e3acdbe3ac1dba6158c527fb6eefd7091", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling heapless v0.7.10
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling postcard-cobs v0.1.5-pre
[INFO] [stderr]    Compiling hash32 v0.2.1
[INFO] [stderr]    Compiling mnemos-userspace v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling spin v0.9.2
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling postcard v0.7.3
[INFO] [stderr]    Compiling mnemos-common v0.1.0
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout]  7 |   /// The user must provide a `no_mangle` entrypoint.
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  8 | / extern "Rust" {
[INFO] [stdout]  9 | |     fn entry() -> !;
[INFO] [stdout] 10 | | }
[INFO] [stdout]    | |_- rustdoc does not generate documentation for extern blocks
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mnemos-userspace` (bin "mnemos-userspace") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "ee675b0be005ae75c0d3f8d97a8cf96e3acdbe3ac1dba6158c527fb6eefd7091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee675b0be005ae75c0d3f8d97a8cf96e3acdbe3ac1dba6158c527fb6eefd7091", kill_on_drop: false }`
[INFO] [stdout] ee675b0be005ae75c0d3f8d97a8cf96e3acdbe3ac1dba6158c527fb6eefd7091