miniblog.

One thing I've learnt from writing a toy compiler is that this instruction usually means you have a bug: add %al,(%rax) This is the instruction encoding of all zeroes. It means you've jumped to the wrong place, or screwed up the size of an operand.

I see mypy more as a refactoring tool, but I'm always pleasantly surprised when it catches issues. It caught a bug here! demo.py:96: error: Unsupported operand types for >= ("int" and "Optional[int]") (In the code I've checked max_val is not None, but used min_val.)