Highlights

• SuiteSparse:GraphBLAS 10.5.2, a bug-fix release (#160). Fixes include:

  • GrB_select with a built-in VALUE* operator of a different type than the input (e.g. an INT8 matrix with GrB_VALUEEQ_FP64) kept the wrong entries or values.
  • GxB_Matrix_reshape silently corrupted indices when a new dimension exceeded 2^32.
  • GxB_*_sort could take quadratic time on already-sorted input.
  • The historical GxB_*_import methods checked the size of Ax incorrectly.
  • Not in GraphBLAS's ChangeLog: a memory arena created by GxB_arena_init without a realloc function had its memory freed by the default arena's free, which could crash.

  See the GraphBLAS 10.5.2 release notes.

Changes to lib (#160)

• Removed: GxB_NONBLOCKING_GPU and GxB_BLOCKING_GPU. GraphBLAS 10.5.2 made them historical aliases of GrB_NONBLOCKING and GrB_BLOCKING; use those instead. The development branch of python-graphblas references them and needs an update. The released python-graphblas 2025.2.0 requires suitesparse-graphblas <10, so it is unaffected.
• Added: GxB_NARENAS_GPU.

Maintenance

cibuildwheel 4.3.3 and gh-action-pypi-publish 1.14.3, both with fixes for the eMudhra CA compromise, and zizmor 1.31.1. (#160)

Highlights

• Python 3.15: wheels for CPython 3.15 and free-threaded 3.15t (#157, #159)
• WebAssembly wheels for Pyodide (PEP 783 pyemscripten, Python 3.13 and 3.14), so
  await micropip.install("suitesparse-graphblas") works in Pyodide 314 (Python 3.14) and
  0.29.4+ (Python 3.13), and in JupyterLite. GraphBLAS runs single-threaded there. (#158)
• Memory-safety fixes: NumPy ≥ 2.5 allocates array data with a different allocator, so
  serialize_matrix/serialize_vector and binread could abort on free-threaded 3.15 or
  under PYTHONMALLOC=debug. Arrays that share memory with GraphBLAS now carry a NumPy
  memory handler (NEP 49) that matches the GraphBLAS allocator (including GraphBLAS ≥ 10.4
  memory arenas) that frees them. (#157)

suitesparse_graphblas.utils (#157)

• New give_buffer(...): a context manager that hands an array's data to a GraphBLAS
  function that takes ownership (e.g. GxB_Matrix_pack_CSR, GxB_Vector_load). It copies
  when GraphBLAS can't own the data, and commits only if GraphBLAS actually took it.
• New empty(...): allocates an array that GraphBLAS can always take ownership of.
• New can_unclaim_buffer(array, arena=None).
• claim_buffer and claim_buffer_2d take an optional arena argument.
• Behavior change: unclaim_buffer now raises ValueError when GraphBLAS can't safely
  own the data: a view, a read-only array, an object dtype, or memory from another allocator
  (e.g. NumPy-allocated arrays with memory_manager="c", or a custom NumPy memory handler).
  Use give_buffer, or check can_unclaim_buffer first.

Other fixes

• initialize() raises if GraphBLAS fails to initialize, instead of continuing silently. (#157)
• binread allocates with GraphBLAS's allocator instead of libc malloc, and reads iso
  matrices correctly. binwrite restores the matrix if writing fails. (#157)

Platform and packaging changes

• macOS arm64 wheels now require macOS 15 (previously 14), because GitHub is retiring
  its macOS 14 runners. (#159)
• PyPy wheels now target PyPy 8.0 (pypy311_pp80). PyPy 7.3 can't install them and will
  build from the sdist. Windows PyPy wheels are no longer built. (#159)
• Wheels no longer include build-only .c/.h sources, so they are smaller. (#158)
• Releases are now published with PyPI Trusted Publishing instead of an API token. (#157)

Maintenance

cibuildwheel 4.3. GitHub Actions are pinned to commit SHAs with least-privilege permissions,
and actionlint/zizmor/pysentry checks were added. pytest is stricter (warnings are errors),
and new memory tests run under PYTHONMALLOC=debug. suitesparse.sh now stops at the first
failure and uses the CMake option names GraphBLAS honors (GRAPHBLAS_COMPACT,
GRAPHBLAS_JITINIT). (#157, #158, #159)

Update to SuiteSparse:GraphBLAS 10.5.1 #155

Update cmake config options and ensure SuiteSparse:GraphBLAS is compiled with OpenMP support.

Update to SuiteSparse:GraphBLAS 10.5.0 #153

Update to SuiteSparse:GraphBLAS 10.4.1 #152

Update to SuiteSparse:GraphBLAS 10.4.0 (#151)

• Update to SuiteSparse:GraphBLAS 10.3.1 (#142)
• Add support for Python 3.14
• Drop support for Python 3.9 and 3.10

• Update to SuiteSparse:GraphBLAS 10.1.1 (#141)

• Update to SuiteSparse:GraphBLAS 10.0.1 (#132
  • Fix minor issue that prevented publishing 10.0.1.0 to PyPI (#140)