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• Non-significant (changelog entry is not required)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):
It may fail for the following reasons:

• the function to generate numbers may be inlined and does not appear as a symbol (this was noticed in release build with clang-10 but it looks like not the case for gcc);
• the query may process too quicky but profiler interval was set to just 10 times per second;
• if we execute test multiple times a second, ORDER BY event_time may return non-deterministic result.