fatal error: malformed or corrupted AST file - Xcode

Question

I get this error when building my app in the latest version of Xcode:

fatal error: malformed or corrupted AST file: \'Unable to load module \"/Users

Answer 1

Cleaning the project and deleting the drive data didn't fix it for me. But what finally fixed it was changing the model of simulator that I used.

So first do a clean, then if you were running it on iPhone 5 simulator, run it on iPhone 5s simulator to fix the issue. basically, run it on any other simulator other than the one you were running.

(Credit to Hlung for his answer, I hope this one is a bit more clear)