[INFO] fetching crate umath 0.0.7...
[INFO] testing umath-0.0.7 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate umath 0.0.7 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate umath 0.0.7
[INFO] finished tweaking crates.io crate umath 0.0.7
[INFO] tweaked toml for crates.io crate umath 0.0.7 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate umath 0.0.7 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] 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 58acc293c78df561e26655f931cd8e61d94ba5884367e4501829cabe96539cf7
[INFO] running `Command { std: "docker" "start" "-a" "58acc293c78df561e26655f931cd8e61d94ba5884367e4501829cabe96539cf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58acc293c78df561e26655f931cd8e61d94ba5884367e4501829cabe96539cf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58acc293c78df561e26655f931cd8e61d94ba5884367e4501829cabe96539cf7", kill_on_drop: false }`
[INFO] [stdout] 58acc293c78df561e26655f931cd8e61d94ba5884367e4501829cabe96539cf7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b67139d022415f3a9c30e34a4448d07a2aefaba15d138bcec479e4e7fd43990b
[INFO] running `Command { std: "docker" "start" "-a" "b67139d022415f3a9c30e34a4448d07a2aefaba15d138bcec479e4e7fd43990b", kill_on_drop: false }`
[INFO] [stderr]    Compiling umath v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(core_intrinsics)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core_intrinsics` is internal to the compiler or standard library
[INFO] [stdout]   --> src/lib.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(core_intrinsics)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: using it is strongly discouraged
[INFO] [stdout]    = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `umath` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "b67139d022415f3a9c30e34a4448d07a2aefaba15d138bcec479e4e7fd43990b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b67139d022415f3a9c30e34a4448d07a2aefaba15d138bcec479e4e7fd43990b", kill_on_drop: false }`
[INFO] [stdout] b67139d022415f3a9c30e34a4448d07a2aefaba15d138bcec479e4e7fd43990b