[INFO] fetching crate wasm-reader 0.2.0...
[INFO] testing wasm-reader-0.2.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate wasm-reader 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate wasm-reader 0.2.0
[INFO] finished tweaking crates.io crate wasm-reader 0.2.0
[INFO] tweaked toml for crates.io crate wasm-reader 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate wasm-reader 0.2.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 53 packages to latest compatible versions
[INFO] [stderr]       Adding auto_enums v0.7.12 (available: v0.8.7)
[INFO] [stderr]       Adding derive_more v0.99.20 (available: v2.0.1)
[INFO] [stderr]       Adding quickcheck v0.9.2 (available: v1.0.3)
[INFO] [stderr]       Adding quickcheck_macros v0.9.1 (available: v1.1.0)
[INFO] [stderr]       Adding wasmparser v0.51.4 (available: v0.240.0)
[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-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f4e748967dd2d30bf3b2377143167dfa5e4a262c01bfb82a902def5b76db68a
[INFO] running `Command { std: "docker" "start" "-a" "4f4e748967dd2d30bf3b2377143167dfa5e4a262c01bfb82a902def5b76db68a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f4e748967dd2d30bf3b2377143167dfa5e4a262c01bfb82a902def5b76db68a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f4e748967dd2d30bf3b2377143167dfa5e4a262c01bfb82a902def5b76db68a", kill_on_drop: false }`
[INFO] [stdout] 4f4e748967dd2d30bf3b2377143167dfa5e4a262c01bfb82a902def5b76db68a
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 401aceb82b23052af14c0611723a7f9bd9b190a0516d3715e7932c4e47c0787d
[INFO] running `Command { std: "docker" "start" "-a" "401aceb82b23052af14c0611723a7f9bd9b190a0516d3715e7932c4e47c0787d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling auto_enums_derive v0.7.12
[INFO] [stderr]    Compiling syn v2.0.108
[INFO] [stderr]    Compiling frunk_core v0.3.2
[INFO] [stderr]    Compiling wasmparser v0.51.4
[INFO] [stderr]    Compiling backtrace v0.3.76
[INFO] [stderr]    Compiling wasm-reader-traits v0.1.1
[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/wasm-reader-traits-0.1.1/src/lib.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature = "nightly", feature(specialization))]
[INFO] [stdout]   |                                  ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wasm-reader-traits` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "401aceb82b23052af14c0611723a7f9bd9b190a0516d3715e7932c4e47c0787d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "401aceb82b23052af14c0611723a7f9bd9b190a0516d3715e7932c4e47c0787d", kill_on_drop: false }`
[INFO] [stdout] 401aceb82b23052af14c0611723a7f9bd9b190a0516d3715e7932c4e47c0787d