「通过改 Bug 的方式来面试」，很好的想法，一方面 Debug 是程序员每天都会做的事，Debug 能力很能体现程序员的功力，最大的问题就是准备题目会比较辛苦。

Here’s a repo you’ve never seen before. Here’s how to build and run the tests in this repo. There’s a bug: what we’re observing is X, but we want to see Y instead. Find the bug and maybe even write some code to fix it.