Caused the server to crash

[VinAdmin]

Added a check for nil.

[OgelGames]

This won't change anything, nil values are already cancelled out by the or 0, and it's not the value that is the problem anyway, it's the table index.

It looks like minetest.hash_node_position is returning NaN (not nil), which means the value passed to that function is the problem.

[VinAdmin]

After this fix, everything started working correctly.

[SwissalpS]

I agree with OgelGames, it's the value in h that is causing the error.

The reason it worked for you after this patch must be somewhere else. Possibly entity._pos was invalid in the run that crashed your game.

Please try and find a reliable way to reproduce the crash situation.

(Side-note: seriously a screenshot of text?)

[VinAdmin]

(Side-note: seriously a screenshot of text?)

Unfortunately, the log file was not saved.

I hoped that the error was not only mine.