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Is your fork public? Have an example of where Stockfish does not blunder with your change?

It's not public, but the diff is tiny: https://pastebin.com/Nd2sS0KX

Also - it's not only my change is making stockfish not blunder. Any little change in the code or execution will butterly-effect into no blunder.

To reproduce a bunder you have to be very deterministic. You need to specify threads = 1, and fixed cache sizes.

I have no logs and exact settings used anymore unfortunately.

One example move was 48. g4 from this game: https://lichess.org/osSoJGzO#95