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

Status: Open.

#4752 In facebook/zstd;

· kdave opened on Aug 31, 2026

COVER_selectDict() uses stale customDictContentEnd after ZDICT_finalizeDictionary modifies dictContentSize

Status: Open.

#4750 In facebook/zstd;

· zhangguoen1995 opened on Aug 31, 2026

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

Status: Open.

#4748 In facebook/zstd;

· pratikfarkasest opened on Aug 28, 2026

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

Status: Open.

#4744 In facebook/zstd;

· qahsan99 opened on Aug 26, 2026

Non-deterministic output with ZSTD_createCDict_byReference

Status: Open.

#4738 In facebook/zstd;

· cdcxd opened on Aug 20, 2026

frame offset/size scanner without decompressing for concurrency

Status: Open.

#4734 In facebook/zstd;

· 0xfka opened on Aug 12, 2026

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

Status: Open.

#4725 In facebook/zstd;

· teerthsharma opened on Aug 2, 2026

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

Status: Open.

#4723 In facebook/zstd;

· teerthsharma opened on Aug 2, 2026

Document --fast levels

Status: Open.

#4716 In facebook/zstd;

· jxu opened on Jul 28, 2026

ZSTD_LEGACY_SUPPORT documentation is missing in CMake

Status: Open.

#4709 In facebook/zstd;

· 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

Status: Open.

#4706 In facebook/zstd;

· hpahuja opened on Jul 9, 2026

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

Status: Open.

#4705 In facebook/zstd;

· natsumxd opened on Jul 9, 2026