[INFO] fetching crate data-streams 2.0.0...
[INFO] testing data-streams-2.0.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate data-streams 2.0.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate data-streams 2.0.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate data-streams 2.0.0
[INFO] tweaked toml for crates.io crate data-streams 2.0.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate data-streams 2.0.0 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 data-streams 2.0.0 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 3210c014ecffa906e4001e813782d5b54ea04953cf295917d2fef749d960ed5b
[INFO] running `Command { std: "docker" "start" "-a" "3210c014ecffa906e4001e813782d5b54ea04953cf295917d2fef749d960ed5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3210c014ecffa906e4001e813782d5b54ea04953cf295917d2fef749d960ed5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3210c014ecffa906e4001e813782d5b54ea04953cf295917d2fef749d960ed5b", kill_on_drop: false }`
[INFO] [stdout] 3210c014ecffa906e4001e813782d5b54ea04953cf295917d2fef749d960ed5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 3cee66ec3441930455e3db38de38576847fb1e4ae4451d232fe388224b924d06
[INFO] running `Command { std: "docker" "start" "-a" "3cee66ec3441930455e3db38de38576847fb1e4ae4451d232fe388224b924d06", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling bytemuck v1.23.1
[INFO] [stderr]    Compiling simdutf8 v0.1.5
[INFO] [stderr]    Compiling data-streams v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "3cee66ec3441930455e3db38de38576847fb1e4ae4451d232fe388224b924d06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cee66ec3441930455e3db38de38576847fb1e4ae4451d232fe388224b924d06", kill_on_drop: false }`
[INFO] [stdout] 3cee66ec3441930455e3db38de38576847fb1e4ae4451d232fe388224b924d06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93dbf63d779edf4c9b0f52f7694111a1dbc15eac76dab0148da6d014f62b5b33
[INFO] running `Command { std: "docker" "start" "-a" "93dbf63d779edf4c9b0f52f7694111a1dbc15eac76dab0148da6d014f62b5b33", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustix v0.38.34
[INFO] [stderr]    Compiling fastrand v2.1.0
[INFO] [stderr]    Compiling bit-vec v0.8.0
[INFO] [stderr]    Compiling unarray v0.1.4
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling syn v2.0.72
[INFO] [stderr]    Compiling bit-set v0.8.0
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling rand_xorshift v0.4.0
[INFO] [stderr]    Compiling tempfile v3.10.1
[INFO] [stderr]    Compiling zerocopy-derive v0.6.6
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling zerocopy v0.6.6
[INFO] [stderr]    Compiling ppv-lite86 v0.2.18
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling proptest v1.7.0
[INFO] [stderr]    Compiling data-streams v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:84:19
[INFO] [stdout]    |
[INFO] [stdout] 84 | #![cfg_attr(test, feature(assert_matches))]
[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 `data-streams` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "93dbf63d779edf4c9b0f52f7694111a1dbc15eac76dab0148da6d014f62b5b33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93dbf63d779edf4c9b0f52f7694111a1dbc15eac76dab0148da6d014f62b5b33", kill_on_drop: false }`
[INFO] [stdout] 93dbf63d779edf4c9b0f52f7694111a1dbc15eac76dab0148da6d014f62b5b33
