[INFO] fetching crate burn-nn 0.21.0-pre.3...
[INFO] testing burn-nn-0.21.0-pre.3 against beta-2026-04-21 for beta-1.96-1
[INFO] extracting crate burn-nn 0.21.0-pre.3 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate burn-nn 0.21.0-pre.3
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate burn-nn 0.21.0-pre.3
[INFO] tweaked toml for crates.io crate burn-nn 0.21.0-pre.3 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate burn-nn 0.21.0-pre.3 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate burn-nn 0.21.0-pre.3 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-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 859151bebb8e96c09461b86fec821276fa5a3f533dd5d4852abef4c41d045ef0
[INFO] running `Command { std: "docker" "start" "-a" "859151bebb8e96c09461b86fec821276fa5a3f533dd5d4852abef4c41d045ef0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "859151bebb8e96c09461b86fec821276fa5a3f533dd5d4852abef4c41d045ef0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "859151bebb8e96c09461b86fec821276fa5a3f533dd5d4852abef4c41d045ef0", kill_on_drop: false }`
[INFO] [stdout] 859151bebb8e96c09461b86fec821276fa5a3f533dd5d4852abef4c41d045ef0
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9bc55081cfc2baee432ed1fad8dac49bf4a7476eab25af768153b01e3e1f8e3a
[INFO] running `Command { std: "docker" "start" "-a" "9bc55081cfc2baee432ed1fad8dac49bf4a7476eab25af768153b01e3e1f8e3a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.184
[INFO] [stderr]    Compiling memchr v2.8.0
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling getrandom v0.4.2
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling simd-adler32 v0.3.9
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling miniz_oxide v0.8.9
[INFO] [stderr]    Compiling cubecl-common v0.10.0-pre.3
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling fastrand v2.3.0
[INFO] [stderr]    Compiling futures-lite v2.6.1
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling nom v8.0.0
[INFO] [stderr]    Compiling spin v0.10.0
[INFO] [stderr]    Compiling serde_bytes v0.11.19
[INFO] [stderr]    Compiling oneshot v0.2.1
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling embassy-futures v0.1.2
[INFO] [stderr]    Compiling bytes v1.11.1
[INFO] [stderr]    Compiling rand v0.10.0
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling rand_distr v0.6.0
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling rmp v0.8.15
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling colored v3.1.1
[INFO] [stderr]    Compiling flate2 v1.1.9
[INFO] [stderr]    Compiling uuid v1.23.0
[INFO] [stderr]    Compiling data-encoding v2.10.0
[INFO] [stderr]    Compiling darling_core v0.21.3
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling tynm v0.2.0
[INFO] [stderr]    Compiling backtrace v0.3.76
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling zerocopy-derive v0.8.48
[INFO] [stderr]    Compiling derive-new v0.7.0
[INFO] [stderr]    Compiling bytemuck_derive v1.10.2
[INFO] [stderr]    Compiling derive_more-impl v2.1.1
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling burn-derive v0.21.0-pre.3
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling darling_macro v0.21.3
[INFO] [stderr]    Compiling darling v0.21.3
[INFO] [stderr]    Compiling enumset_derive v0.14.0
[INFO] [stderr]    Compiling derive_more v2.1.1
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling enumset v1.1.10
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling bincode v2.0.1
[INFO] [stderr]    Compiling rmp-serde v1.3.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling cubecl-zspace v0.10.0-pre.3
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling half v2.7.1
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling burn-std v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-backend v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-tensor v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-core v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-nn v0.21.0-pre.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 33s
[INFO] running `Command { std: "docker" "inspect" "9bc55081cfc2baee432ed1fad8dac49bf4a7476eab25af768153b01e3e1f8e3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bc55081cfc2baee432ed1fad8dac49bf4a7476eab25af768153b01e3e1f8e3a", kill_on_drop: false }`
[INFO] [stdout] 9bc55081cfc2baee432ed1fad8dac49bf4a7476eab25af768153b01e3e1f8e3a
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 71ac6a21b74ac5031656e793df2228a0fd1af07920e1c1406a84d052a279a0c6
[INFO] running `Command { std: "docker" "start" "-a" "71ac6a21b74ac5031656e793df2228a0fd1af07920e1c1406a84d052a279a0c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling bytemuck_derive v1.10.2
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling hashbrown v0.16.1
[INFO] [stderr]    Compiling derive-new v0.7.0
[INFO] [stderr]    Compiling derive_more-impl v2.1.1
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling darling_core v0.21.3
[INFO] [stderr]    Compiling darling_core v0.23.0
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling option-ext v0.2.0
[INFO] [stderr]    Compiling dirs-sys v0.5.0
[INFO] [stderr]    Compiling tracing-core v0.1.36
[INFO] [stderr]    Compiling cubecl-common v0.10.0-pre.3
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling futures-lite v2.6.1
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling darling_macro v0.21.3
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling half v2.7.1
[INFO] [stderr]    Compiling darling v0.21.3
[INFO] [stderr]    Compiling darling_macro v0.23.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling darling v0.23.0
[INFO] [stderr]    Compiling float8 v0.7.0
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling enumset_derive v0.14.0
[INFO] [stderr]    Compiling derive_more v2.1.1
[INFO] [stderr]    Compiling serde_bytes v0.11.19
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling event-listener v5.4.1
[INFO] [stderr]    Compiling spin v0.10.0
[INFO] [stderr]    Compiling tracing v0.1.44
[INFO] [stderr]    Compiling dirs v6.0.0
[INFO] [stderr]    Compiling xxhash-rust v0.8.15
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling winnow v1.0.1
[INFO] [stderr]    Compiling float4 v0.2.0
[INFO] [stderr]    Compiling event-listener-strategy v0.5.4
[INFO] [stderr]    Compiling cubecl-macros-internal v0.10.0-pre.3
[INFO] [stderr]    Compiling toml_parser v1.1.2+spec-1.1.0
[INFO] [stderr]    Compiling toml_datetime v1.1.1+spec-1.1.0
[INFO] [stderr]    Compiling serde_spanned v1.1.1
[INFO] [stderr]    Compiling enumset v1.1.10
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling rand v0.10.0
[INFO] [stderr]    Compiling sanitize-filename v0.6.0
[INFO] [stderr]    Compiling variadics_please v1.1.0
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]    Compiling cubecl-runtime v0.10.0-pre.3
[INFO] [stderr]    Compiling cubecl-macros v0.10.0-pre.3
[INFO] [stderr]    Compiling float-ord v0.3.2
[INFO] [stderr]    Compiling toml_writer v1.1.1+spec-1.1.0
[INFO] [stderr]    Compiling async-channel v2.5.0
[INFO] [stderr]    Compiling toml v1.1.2+spec-1.1.0
[INFO] [stderr]    Compiling cubecl-zspace v0.10.0-pre.3
[INFO] [stderr]    Compiling inflections v1.1.1
[INFO] [stderr]    Compiling md5 v0.8.0
[INFO] [stderr]    Compiling bitflags v2.11.0
[INFO] [stderr]    Compiling cubecl v0.10.0-pre.3
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling rand_distr v0.6.0
[INFO] [stderr]    Compiling libc v0.2.184
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling cubecl-ir v0.10.0-pre.3
[INFO] [stderr]    Compiling crunchy v0.2.4
[INFO] [stderr]    Compiling darling_core v0.20.11
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling indexmap v2.13.0
[INFO] [stderr]    Compiling matrixmultiply v0.3.10
[INFO] [stderr]    Compiling thread-tree v0.3.3
[INFO] [stderr]    Compiling getrandom v0.2.17
[INFO] [stderr]    Compiling macerator v0.3.1
[INFO] [stderr]    Compiling rstest_macros v0.26.1
[INFO] [stderr]    Compiling rmp v0.8.15
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling once_cell v1.21.4
[INFO] [stderr]    Compiling bincode v2.0.1
[INFO] [stderr]    Compiling toml_edit v0.25.10+spec-1.1.0
[INFO] [stderr]    Compiling rmp-serde v1.3.1
[INFO] [stderr]    Compiling const-random-macro v0.1.16
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling darling_macro v0.20.11
[INFO] [stderr]    Compiling darling v0.20.11
[INFO] [stderr]    Compiling macerator-macros v0.1.4
[INFO] [stderr]    Compiling proc-macro-crate v3.5.0
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling burn-derive v0.21.0-pre.3
[INFO] [stderr]    Compiling futures-macro v0.3.32
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling burn-ndarray v0.21.0-pre.3
[INFO] [stderr]    Compiling relative-path v1.9.3
[INFO] [stderr]    Compiling moddef v0.3.0
[INFO] [stderr]    Compiling ndarray v0.17.2
[INFO] [stderr]    Compiling futures-util v0.3.32
[INFO] [stderr]    Compiling const-random v0.1.18
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling atomic_float v1.1.0
[INFO] [stderr]    Compiling seq-macro v0.3.6
[INFO] [stderr]    Compiling futures-timer v3.0.3
[INFO] [stderr]    Compiling cubecl-core v0.10.0-pre.3
[INFO] [stderr]    Compiling rstest v0.26.1
[INFO] [stderr]    Compiling burn-std v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-backend v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-tensor v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-ir v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-autodiff v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-core v0.21.0-pre.3
[INFO] [stderr]    Compiling burn-nn v0.21.0-pre.3 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `burn-nn` (lib test)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name burn_nn --edition=2024 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 '--deny=rustdoc::invalid_html_tags' '--deny=rustdoc::broken_intra_doc_links' --test --cfg 'feature="default"' --cfg 'feature="std"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("burn-cuda", "burn-fusion", "burn-remote", "burn-rocm", "burn-router", "burn-tch", "burn-wgpu", "default", "doc", "std", "test-cuda", "test-memory-checks", "test-metal", "test-rocm", "test-tch", "test-vulkan", "test-wgpu", "tracing"))' -C metadata=024c7a724fe405a7 -C extra-filename=-0e767f9453831f3a --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern burn_autodiff=/opt/rustwide/target/debug/deps/libburn_autodiff-69f249ca66338317.rlib --extern burn_core=/opt/rustwide/target/debug/deps/libburn_core-6adc4cd2b89ea395.rlib --extern burn_ndarray=/opt/rustwide/target/debug/deps/libburn_ndarray-108a262d4fec7507.rlib --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-551d7e3effd11bdb.rlib --extern rstest=/opt/rustwide/target/debug/deps/librstest-7571616f24d906d3.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "71ac6a21b74ac5031656e793df2228a0fd1af07920e1c1406a84d052a279a0c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71ac6a21b74ac5031656e793df2228a0fd1af07920e1c1406a84d052a279a0c6", kill_on_drop: false }`
[INFO] [stdout] 71ac6a21b74ac5031656e793df2228a0fd1af07920e1c1406a84d052a279a0c6