Recently the biggest breaking changes have been a large amount of syntax removed from the language: https://github.com/mozilla/rust/issues/4707 https://github.c

Recently the biggest breaking changes have been a large amount of syntax removed from the language: https://github.com/mozilla/rust/issues/4707 https://github.com/mozilla/rust/issues/4707 But, as far as I understand, the goal is to not change the syntax much from now, and actually get it 'frozen' by 0.7.