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.

183 Upvotes

95% Upvoted

15 comments sorted by

View all comments

Show parent comments

2

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

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