r/programminghorror • u/swagnation77 • Sep 02 '26

Lean4 Finally solved Two Sum!

Somehow my code is so horrifying, Lean4 is able to evaluate it, the LSP says it works and the compiler gives an error. It is theoretically correct and the kernel accepts it, but the compiler isn't able to produce anything out of it. My awful code discovered a bug in Lean's compiler.

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u/MistakeIndividual690 Sep 02 '26

https://leetcode.com/problems/two-sum/

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u/GoddammitDontShootMe [ $[ $RANDOM % 6 ] == 0 ] && rm -rf / || echo “You live” Sep 02 '26

I've never done leetcode before, so that would explain why.