Issues

• estimated_compression_context_size() raises SIGFPE with `enable_ldm=True

  indygreg/python-zstandard#345 · Filter by author marinelay opened on Sep 19, 2026

• multi_decompress_to_buffer([]) terminates the process with SIGFPE

  indygreg/python-zstandard#335 · Filter by author marinelay opened on Aug 25, 2026

• Add RISE runner capability to repo: riscv64

  indygreg/python-zstandard#334 · Filter by author eshattow opened on Aug 13, 2026

• Add IBM runner capability to repo: ppc64le s390x

  indygreg/python-zstandard#333 · Filter by author eshattow opened on Aug 13, 2026

• ZstdDecompressor.decompress: excessive allocation (crash) on 13-byte malformed frame (decompressor.c:335); should raise ZstdError

  indygreg/python-zstandard#332 · Filter by author plotarmordev opened on Aug 10, 2026

• ZstdCompressionWriter() constructs successfully but leads to segmentation fault

  indygreg/python-zstandard#331 · Filter by author marinelay opened on Aug 4, 2026

• Segfault in ZstdCompressorIterator_iternext with buffer-protocol data

  indygreg/python-zstandard#303 · Filter by author arnimarj opened on May 27, 2026
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• Modernization roadmap: multi-phase init, stable ABI, free-threading, GC support, deprecated-API cleanup (discussion)

  indygreg/python-zstandard#302 · Filter by author devdanzin opened on Apr 19, 2026

• CFFI backend parity gaps: garbled ZstdError messages, __exit__ ordering mismatch with C backend, minor parameter-validation drift

  indygreg/python-zstandard#301 · Filter by author devdanzin opened on Apr 19, 2026

• GIL held during long-running ZSTD operations: 7 sites (5 EOF compression finalizations + dictionary creation + dict-chain content-size)

  indygreg/python-zstandard#300 · Filter by author devdanzin opened on Apr 19, 2026

• MemoryError silently swallowed in 20 sites: 18 PyObject_HasAttrString + 2 unguarded PyErr_Clear after PyObject_GetBuffer (silent data loss in flush() / close())

  indygreg/python-zstandard#299 · Filter by author devdanzin opened on Apr 19, 2026

• OOM-path hardening: ~45 sites crash on allocation failure (most critically: ZstdError NULL at module init cascades into ~50 error paths)

  indygreg/python-zstandard#298 · Filter by author devdanzin opened on Apr 19, 2026

• Fix-propagation gaps: compressionreader missing 3 mirrors of fixes previously applied to decompressionreader

  indygreg/python-zstandard#297 · Filter by author devdanzin opened on Apr 19, 2026

• Memory leaks in stream lifecycle: 4 __exit__ + 2 close() discard CallMethod returns; 5 types leak on __init__ re-call (~5.5 KB); 2 Py_buffer leaks on closed streams

  indygreg/python-zstandard#296 · Filter by author devdanzin opened on Apr 19, 2026

• Silent data-correctness bug: readinto() / readinto1() on stream_reader return tell() == 0 after successful reads

  indygreg/python-zstandard#295 · Filter by author devdanzin opened on Apr 19, 2026

• Heap-type refcount imbalance: 19 dealloc sites miss Py_DECREF(Py_TYPE(self)) + 4 factories bypass tp_alloc (type-object leak, latent crash)

  indygreg/python-zstandard#294 · Filter by author devdanzin opened on Apr 19, 2026

• SystemError / wrong behavior: 15+ sites conflate error-return sentinels with data (PyObject_IsTrue, PyObject_IsInstance, PyLong_AsSsize_t)

  indygreg/python-zstandard#293 · Filter by author devdanzin opened on Apr 19, 2026

• Segfault: 4+ unchecked PyBytes_AsStringAndSize on user read() return uses uninitialized memory

  indygreg/python-zstandard#292 · Filter by author devdanzin opened on Apr 19, 2026

• Segfault: 12 types dereference NULL on Type.__new__(Type) without __init__()

  indygreg/python-zstandard#291 · Filter by author devdanzin opened on Apr 19, 2026

• Add riscv64 (linux_riscv64) wheel to PyPI releases

  indygreg/python-zstandard#288 · Filter by author gounthar opened on Mar 11, 2026
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• Support for Python 3.14

  indygreg/python-zstandard#286 · Filter by author leanhdung1994 opened on Jan 14, 2026
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• Unable to build only cext backend with pep517 builders

  indygreg/python-zstandard#284 · Filter by author dgilman opened on Oct 25, 2025
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• Use multi-phase initialisation (PEP 489)

  indygreg/python-zstandard#263 · Filter by author AA-Turner opened on May 28, 2025

• Provide an efficient way to decompress a sequence of chunks compressed with ZstdCompressionChunker

  indygreg/python-zstandard#259 · Filter by author jbosboom opened on Apr 5, 2025

• Maintenance support (offer)

  indygreg/python-zstandard#250 · Filter by author jaraco opened on Feb 17, 2025
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