RealFeedApp 418 bugs found in Python
Opus 5.5 agents rewrote CPython internals in Lean, verifying 4,071 functions and uncovering 418 bugs, including 55 that crash the interpreter.
- Field
- programming
- What they did
- AI wrote 613,318 lines of code in Lean that copies Python's internals line by line, and computer proofs found 418 bugs in the process.
- Why it matters
- This enables using mathematically verified code for critical systems where ordinary errors could lead to program crashes or memory corruption.
#cpython#lean#ai agents#formal verification#bugs
