Swift compiler segmentation fault when building

Question

Adding a (convenient) computed height property to UIView in my UIViewExtension.swift file is causing the Swift compiler to segfault...

Answer 1

In Xcode 7, you can click on the error in the Debug Navigator and you'll be shown an expanded view of the crashes. Clicking on the hamburger button on the right expands the error, and if you scroll all the way down to the bottom of the expanded error message, you will see where it comes from.

For me, I had two of those segmentation fault errors. In the picture above, the first one is what it looks like when collapsed, the second is when you expand the hamburger button. At the very bottom of the expanded gray box, you'll see a message that says where the compiler crashed.

Note however that the error message may at times be not informative enough, so while it tells you where it crashed, it doesn't always say why and how to fix it. Getting rid of this error is still very much a matter of guesswork.