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So here's a story of, by far, the weirdest bug I've encountered in my CS career. (threadreaderapp.com)

submitted 6 months ago by [email protected] to c/[email protected]

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Along with @maciejwolczyk we've been training a neural network that learns how to play NetHack, an old roguelike game, that looks like in the screenshot. Recently, something unexpected happened.

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[–] [email protected] 1 points 5 months ago

Yeah, if you get this exception and not doing anything not-"normal" then the chance is high that there are multiple versions of the same class. A possible way to trigger this is when extracting code to a separate module without changing the package. If you copy instead of move and change something you will have a bad time. It is also possible that the IDE complains but building and executing works.

Fun times!