Go 1.13: xerrors
It seems like golang designers are totally isolated from what's been happening in the last 30 years in languages design. They still insist on their weird way of error handling just like they were stubborn for years and years on the lack of package management and eventually a very weird and rudimentary way of it. It's sad because I use this language extensively but its weirdly mediocre design is totally unfathomable. It's like they are very stubborn to do anything but the right thing.