[BUG] Zstandard not functioning for certain files on macOS 27.0

Configuration

• Keka version: 1.6.7
• macOS version: 27.0

Describe the bug

When I was trying to extract a Zstandard file—without a TAR archive, it won't work because of multi-threading.

This only happens on certain files.

To Reproduce

Steps to reproduce the behavior with a single file:

1. Drag any file with *.*.zst to extract onto the interface to extract the file

Expected behavior

The Zstandard file is decompressed and written to the same location as the compressed file.

Attachments

Keka_2026-09-21-171112454.log.zip