# rustc version rustc 1.96.0-nightly (ac7f9ec7d 2026-03-20)
# docs.rs version docsrs 0.0.0 (da7690ee 2026-03-15 )
# build log [INFO] running `Command { std: "docker" "create" "-v" "/home/cratesfyi/workspace/builds/sklears-python-0.1.0/target:/opt/rustwide/target:rw,Z" "-v" "/home/cratesfyi/workspace/builds/sklears-python-0.1.0/source:/opt/rustwide/workdir:ro,Z" "-v" "/home/cratesfyi/workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/home/cratesfyi/workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "DOCS_RS=1" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "6442450944" "--cpus" "6" "--user" "1001:1001" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "rustdoc" "--lib" "-Zrustdoc-map" "--config" "build.rustdocflags=[\"--cfg\", \"docsrs\", \"-Z\", \"unstable-options\", \"--emit=invocation-specific\", \"--resource-suffix\", \"-20260320-1.96.0-nightly-ac7f9ec7d\", \"--static-root-path\", \"/-/rustdoc.static/\", \"--cap-lints\", \"warn\", \"--extern-html-root-takes-precedence\"]" "--offline" "-Zunstable-options" "--config=doc.extern-map.registries.crates-io=\"https://docs.rs/{pkg_name}/{version}/aarch64-unknown-linux-gnu\"" "-Zrustdoc-scrape-examples" "-j6" "--target" "aarch64-unknown-linux-gnu", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 1df9e371e13d3eaa8ab933b7cac85cb1c042a8d5317c9e4b97e943f4dc456574 [INFO] running `Command { std: "docker" "start" "-a" "1df9e371e13d3eaa8ab933b7cac85cb1c042a8d5317c9e4b97e943f4dc456574", kill_on_drop: false }` [INFO] [stderr] warning: target filter specified, but no targets matched; this is a no-op [INFO] [stderr] Checking scirs2-core v0.3.4 [INFO] [stderr] Compiling pyo3-ffi v0.28.2 [INFO] [stderr] Checking simd-adler32 v0.3.8 [INFO] [stderr] Compiling scirs2-metrics v0.3.4 [INFO] [stderr] Checking digest v0.10.7 [INFO] [stderr] Compiling blake3 v1.8.3 [INFO] [stderr] Checking ciborium v0.2.2 [INFO] [stderr] error: failed to run custom build command for `pyo3-ffi v0.28.2` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/pyo3-ffi-a01712250bdbcab4/build-script-build` (exit status: 1) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_LIMITED_API) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_GIL_DISABLED) [INFO] [stderr] cargo:rustc-check-cfg=cfg(PyPy) [INFO] [stderr] cargo:rustc-check-cfg=cfg(GraalPy) [INFO] [stderr] cargo:rustc-check-cfg=cfg(py_sys_config, values("Py_DEBUG", "Py_REF_DEBUG", "Py_TRACE_REFS", "COUNT_ALLOCS")) [INFO] [stderr] cargo:rustc-check-cfg=cfg(pyo3_disable_reference_pool) [INFO] [stderr] cargo:rustc-check-cfg=cfg(pyo3_leak_on_drop_without_reference_pool) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_3_7) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_3_8) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_3_9) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_3_10) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_3_11) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_3_12) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_3_13) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_3_14) [INFO] [stderr] cargo:rustc-check-cfg=cfg(Py_3_15) [INFO] [stderr] cargo:rerun-if-env-changed=PYO3_CROSS [INFO] [stderr] cargo:rerun-if-env-changed=PYO3_CROSS_LIB_DIR [INFO] [stderr] cargo:rerun-if-env-changed=PYO3_CROSS_PYTHON_VERSION [INFO] [stderr] cargo:rerun-if-env-changed=PYO3_CROSS_PYTHON_IMPLEMENTATION [INFO] [stderr] cargo:rerun-if-env-changed=PYO3_NO_PYTHON [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] error: PYO3_CROSS_PYTHON_VERSION or an abi3-py3* feature must be specified when cross-compiling and PYO3_CROSS_LIB_DIR is not set. [INFO] [stderr] = help: see the PyO3 user guide for more information: https://pyo3.rs/v0.28.2/building-and-distribution.html#cross-compiling [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: blake3@1.8.3: Compiler family detection failed due to error: ToolNotFound: failed to find tool "aarch64-linux-gnu-gcc": No such file or directory (os error 2) [INFO] [stderr] error: failed to run custom build command for `blake3 v1.8.3` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/blake3-87293495479dacc0/build-script-build` (exit status: 1) [INFO] [stderr] --- stdout [INFO] [stderr] cargo:rustc-check-cfg=cfg(blake3_sse2_ffi, values(none())) [INFO] [stderr] cargo:rustc-check-cfg=cfg(blake3_sse2_rust, values(none())) [INFO] [stderr] cargo:rustc-check-cfg=cfg(blake3_sse41_ffi, values(none())) [INFO] [stderr] cargo:rustc-check-cfg=cfg(blake3_sse41_rust, values(none())) [INFO] [stderr] cargo:rustc-check-cfg=cfg(blake3_avx2_ffi, values(none())) [INFO] [stderr] cargo:rustc-check-cfg=cfg(blake3_avx2_rust, values(none())) [INFO] [stderr] cargo:rustc-check-cfg=cfg(blake3_avx512_ffi, values(none())) [INFO] [stderr] cargo:rustc-check-cfg=cfg(blake3_neon, values(none())) [INFO] [stderr] cargo:rustc-check-cfg=cfg(blake3_wasm32_simd, values(none())) [INFO] [stderr] cargo:rerun-if-env-changed=CARGO_FEATURE_PURE [INFO] [stderr] cargo:rerun-if-env-changed=CARGO_FEATURE_NO_NEON [INFO] [stderr] cargo:rerun-if-env-changed=CARGO_FEATURE_NEON [INFO] [stderr] cargo:rerun-if-env-changed=CARGO_FEATURE_NEON [INFO] [stderr] cargo:rerun-if-env-changed=CARGO_FEATURE_NO_NEON [INFO] [stderr] cargo:rerun-if-env-changed=CARGO_FEATURE_PURE [INFO] [stderr] cargo:rustc-cfg=blake3_neon [INFO] [stderr] CC_FORCE_DISABLE = None [INFO] [stderr] CC_aarch64-unknown-linux-gnu = None [INFO] [stderr] CC_aarch64_unknown_linux_gnu = None [INFO] [stderr] TARGET_CC = None [INFO] [stderr] CC = None [INFO] [stderr] CROSS_COMPILE = None [INFO] [stderr] cargo:rerun-if-env-changed=CC_ENABLE_DEBUG_OUTPUT [INFO] [stderr] cargo:warning=Compiler family detection failed due to error: ToolNotFound: failed to find tool "aarch64-linux-gnu-gcc": No such file or directory (os error 2) [INFO] [stderr] CRATE_CC_NO_DEFAULTS = None [INFO] [stderr] CFLAGS = None [INFO] [stderr] TARGET_CFLAGS = None [INFO] [stderr] CFLAGS_aarch64_unknown_linux_gnu = None [INFO] [stderr] CFLAGS_aarch64-unknown-linux-gnu = None [INFO] [stderr] [INFO] [stderr] --- stderr [INFO] [stderr] [INFO] [stderr] [INFO] [stderr] error occurred in cc-rs: failed to find tool "aarch64-linux-gnu-gcc": No such file or directory (os error 2) [INFO] [stderr] [INFO] [stderr] [INFO] running `Command { std: "docker" "inspect" "1df9e371e13d3eaa8ab933b7cac85cb1c042a8d5317c9e4b97e943f4dc456574", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1df9e371e13d3eaa8ab933b7cac85cb1c042a8d5317c9e4b97e943f4dc456574", kill_on_drop: false }` [INFO] [stdout] 1df9e371e13d3eaa8ab933b7cac85cb1c042a8d5317c9e4b97e943f4dc456574