Issues

• ZSTD_decompressStream() rejects a legacy (v0.5–v0.7) frame when the first call supplies fewer than 5 bytes

  facebook/zstd#4802 · Filter by author mfleischer-ant opened on Sep 29, 2026

• ICE on powerpc64le-unknown-freebsd-gcc version 17.0.0

  facebook/zstd#4801 · Filter by author xinitrcn1 opened on Sep 28, 2026

• cmake: AddZstdCompilationFlags still depends on C++ after #4357

  facebook/zstd#4800 · Filter by author kasper93 opened on Sep 28, 2026

• Any plans for the next Zstandard release?

  facebook/zstd#4785 · Filter by author Marcelo-Otowicz opened on Sep 11, 2026

• ZSTD_compressSequencesAndLiterals() does not enforce its documented litCapacity >= litSize + 8 contract — the implemented check is 8 bytes weaker than the API documentation, its own error message, and the introducing commit

  facebook/zstd#4779 · Filter by author bbingoCN opened on Sep 10, 2026
  1

• [tests] test-license.py exclusion fails on Windows

  facebook/zstd#4777 · Filter by author dajiaohuang opened on Sep 10, 2026

• Undefined Behavior testing zstd in Gentoo

  facebook/zstd#4776 · Filter by author ChaseKnowlden opened on Sep 10, 2026

• Feature request: native multithreaded decompression for standard frames

  facebook/zstd#4775 · Filter by author arslaman opened on Sep 9, 2026

• Multithreaded compression offers only a slight performance improvement

  facebook/zstd#4762 · Filter by author kakaacat opened on Sep 3, 2026
  1

• More clarity in docus about what "make install" will do, and where.

  facebook/zstd#4757 · Filter by author somian opened on Sep 1, 2026

• seekable_format warning with -DNDEBUG: potential uninitialised local variable newOffset used

  facebook/zstd#4756 · Filter by author RSpliet opened on Sep 1, 2026

• [linux kernel code] CPU feature detection fixups (BMI2)

  facebook/zstd#4752 · Filter by author kdave opened on Aug 31, 2026

• COVER_selectDict() uses stale customDictContentEnd after ZDICT_finalizeDictionary modifies dictContentSize

  facebook/zstd#4750 · Filter by author zhangguoen1995 opened on Aug 31, 2026

• cli-tests: levels.sh --max test fails on systems with < 10GB RAM

  facebook/zstd#4748 · Filter by author pratikfarkasest opened on Aug 28, 2026
  1

• Ques: can any version of the zstd SW produce a compressed file where Block_Content > Block_Maximum_Size

  facebook/zstd#4744 · Filter by author qahsan99 opened on Aug 26, 2026
  1

• Non-deterministic output with ZSTD_createCDict_byReference

  facebook/zstd#4738 · Filter by author cdcxd opened on Aug 20, 2026

• frame offset/size scanner without decompressing for concurrency

  facebook/zstd#4734 · Filter by author 0xfka opened on Aug 12, 2026

• zdict legacy trainer: ZDICT_tryMerge spends its whole quadratic term proving that nothing matches

  facebook/zstd#4725 · Filter by author teerthsharma opened on Aug 2, 2026

• zdict legacy trainer: the merge fixpoint deletes an unrelated segment when the rank sort invalidates its slot index

  facebook/zstd#4723 · Filter by author teerthsharma opened on Aug 2, 2026

• Document --fast levels

  facebook/zstd#4716 · Filter by author jxu opened on Jul 28, 2026

• ZSTD_LEGACY_SUPPORT documentation is missing in CMake

  facebook/zstd#4709 · Filter by author smiRaphi opened on Jul 11, 2026

• Question: Confirming v1.5.5 ↔ v1.5.7 bidirectional compatibility for ZSTD_compress_usingDict / ZSTD_decompress_usingDict with raw-content dictionaries

  facebook/zstd#4706 · Filter by author hpahuja opened on Jul 9, 2026
  1

• Question: Confirming v1.4.1 decoder compatibility with v1.5.7 encoder output

  facebook/zstd#4705 · Filter by author natsumxd opened on Jul 9, 2026

• How to use multithreading in ZTS

  facebook/zstd#4689 · Filter by author shaankevin03 opened on Jun 5, 2026
  1

• Document that --max needs to be passed to the decompressor

  facebook/zstd#4688 · Filter by author injust opened on Jun 4, 2026