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Debugging
(lemmy.ml)
Post funny things about programming here! (Or just rant about your favourite programming language.)
the "sometimes works, don't know why" is the most maddening, I love tearing my hair out just trying to get it to fail reliabily so I've got a single hint
Any problem that's not repeatable is incredibly frustrating, and you're rarely sure if you've truly fixed it in the end.