[INFO] fetching crate disco-rs 0.6.0...
[INFO] testing disco-rs-0.6.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate disco-rs 0.6.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate disco-rs 0.6.0
[INFO] finished tweaking crates.io crate disco-rs 0.6.0
[INFO] tweaked toml for crates.io crate disco-rs 0.6.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate disco-rs 0.6.0 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 70 packages to latest compatible versions
[INFO] [stderr]       Adding elliptic-curve v0.10.6 (available: v0.13.8)
[INFO] [stderr]       Adding heapless v0.7.17 (available: v0.9.1)
[INFO] [stderr]       Adding rand v0.7.3 (available: v0.9.2)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] [stderr]       Adding rand_chacha v0.3.1 (available: v0.9.0)
[INFO] [stderr]       Adding rand_core v0.5.1 (available: v0.9.3)
[INFO] [stderr]       Adding rand_core v0.6.4 (available: v0.9.3)
[INFO] [stderr]       Adding rand_xorshift v0.3.0 (available: v0.4.0)
[INFO] [stderr]       Adding serde-big-array v0.4.1 (available: v0.5.1)
[INFO] [stderr]       Adding strobe-rs v0.7.0 (available: v0.7.1)
[INFO] [stderr]       Adding subtle v2.4.1 (available: v2.6.1)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.17)
[INFO] [stderr]       Adding x25519-dalek v1.2.0 (available: v2.0.1)
[INFO] [stderr]       Adding zeroize v1.3.0 (available: v1.8.2)
[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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] f2dbd2c4e57f65e6030b53dbeb36ff51170c0c5e950313176e231dfca1d68c37
[INFO] running `Command { std: "docker" "start" "-a" "f2dbd2c4e57f65e6030b53dbeb36ff51170c0c5e950313176e231dfca1d68c37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2dbd2c4e57f65e6030b53dbeb36ff51170c0c5e950313176e231dfca1d68c37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2dbd2c4e57f65e6030b53dbeb36ff51170c0c5e950313176e231dfca1d68c37", kill_on_drop: false }`
[INFO] [stdout] f2dbd2c4e57f65e6030b53dbeb36ff51170c0c5e950313176e231dfca1d68c37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] b11490fc8610b00bd6df07cc311e6c392c18af9710901de656b681dcc1030b08
[INFO] running `Command { std: "docker" "start" "-a" "b11490fc8610b00bd6df07cc311e6c392c18af9710901de656b681dcc1030b08", kill_on_drop: false }`
[INFO] [stderr]    Compiling siphasher v0.3.11
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling data-encoding v2.9.0
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling keccak v0.1.5
[INFO] [stderr]    Compiling zeroize v1.3.0
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling hash32 v0.2.1
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling phf v0.10.1
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling data-encoding-macro-internal v0.1.16
[INFO] [stderr]    Compiling phf_generator v0.10.0
[INFO] [stderr]    Compiling phf_codegen v0.10.0
[INFO] [stderr]    Compiling data-encoding-macro v0.1.18
[INFO] [stderr]    Compiling cde v0.3.7
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde-big-array v0.3.3
[INFO] [stderr]    Compiling serde-big-array v0.4.1
[INFO] [stderr]    Compiling strobe-rs v0.7.0
[INFO] [stderr]    Compiling disco-rs v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(trait_alias)]
[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 `disco-rs` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "b11490fc8610b00bd6df07cc311e6c392c18af9710901de656b681dcc1030b08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b11490fc8610b00bd6df07cc311e6c392c18af9710901de656b681dcc1030b08", kill_on_drop: false }`
[INFO] [stdout] b11490fc8610b00bd6df07cc311e6c392c18af9710901de656b681dcc1030b08