The changelog has the details: https://github.com/rust-lang/regex/blob/master/CHANGELOG.md#020
Happy new year! The changelog hopefully details all of the breaking changes. I’m releasing 0.2 first to make sure everything is kosher, and a 1.0 should be soon to follow. Folks upgrading to 0.2 and providing feedback is most appreciated.
Here’s something that will really bake your noodle: with regex 0.2 comes a bump in the minimum supported version of Rust to 1.12. There has been some debate over whether that’s a breaking change or not. But if your crate’s minimum supported version is less than 1.12, does that mean bumping to regex 0.2 is actually a breaking change? And is there a difference between the minimum supported version of Rust and the minimum required version of Rust?