v.20.7Improvement

Fix data race in lgamma function detected by tsan

Official CH changelog text
Fix data race in lgamma function. This race was caught only in tsan, no side effects really happened. #13842 (Nikolai Kochetov).
Fixed a data race condition in the lgamma function detected by ThreadSanitizer (tsan), ensuring thread safety.

Why it matters

This fix addresses a concurrency issue in the lgamma function that, while not causing any known side effects, was identified by tsan. Resolving this data race improves the stability and correctness of multi-threaded operations involving lgamma.

How to use it

Users benefit from this fix automatically once they update to the new ClickHouse version containing this patch; no additional configuration or usage changes are required.

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