[INFO] fetching crate immut_list 0.1.0...
[INFO] testing immut_list-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate immut_list 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate immut_list 0.1.0
[INFO] finished tweaking crates.io crate immut_list 0.1.0
[INFO] tweaked toml for crates.io crate immut_list 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate immut_list 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[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] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 14cbc7d1f7a35d0cfcc0d4333ef57a542edecbb91854f451572f0adb382176ac
[INFO] running `Command { std: "docker" "start" "-a" "14cbc7d1f7a35d0cfcc0d4333ef57a542edecbb91854f451572f0adb382176ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14cbc7d1f7a35d0cfcc0d4333ef57a542edecbb91854f451572f0adb382176ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14cbc7d1f7a35d0cfcc0d4333ef57a542edecbb91854f451572f0adb382176ac", kill_on_drop: false }`
[INFO] [stdout] 14cbc7d1f7a35d0cfcc0d4333ef57a542edecbb91854f451572f0adb382176ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 31572a9e7bfca721ba49608929ab03a99bb5952cecf843f91d48b86f9ccb26a3
[INFO] running `Command { std: "docker" "start" "-a" "31572a9e7bfca721ba49608929ab03a99bb5952cecf843f91d48b86f9ccb26a3", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling data_structure_traits v0.1.12
[INFO] [stdout] error[E0432]: unresolved import `alloc::vec_deque`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/data_structure_traits-0.1.12/src/collections/vec_deque.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | use alloc::vec_deque::VecDeque;
[INFO] [stdout]   |            ^^^^^^^^^ could not find `vec_deque` in `alloc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/data_structure_traits-0.1.12/src/lib.rs:1:35
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(not(feature = "std"), feature(alloc))]
[INFO] [stdout]   |                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `data_structure_traits` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "31572a9e7bfca721ba49608929ab03a99bb5952cecf843f91d48b86f9ccb26a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31572a9e7bfca721ba49608929ab03a99bb5952cecf843f91d48b86f9ccb26a3", kill_on_drop: false }`
[INFO] [stdout] 31572a9e7bfca721ba49608929ab03a99bb5952cecf843f91d48b86f9ccb26a3