ios - 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/me/Library/Developer/Xcode/DerivedData/ModuleCache/XYZYIE6ZV0OP/Darwin.pcm": file not found' note: after modifying system headers, please delete the module cache at '/Users/me/Library/Developer/Xcode/DerivedData/ModuleCache/XYZYIE6ZV0OP' 1 error generated.

When I navigate to:

/Users/me/Library/Developer/Xcode/DerivedData/ModuleCache

I can see that the directory 'XYZYIE6ZV0OP' doesn't exist.

Does anybody know how I can resolve this? I cannot delete anything at the directory as suggested in the 2nd part of the error message as that directory doesn't exist!

Answer 1

Had same problem. Clearing derived data folder solved the issue for me. In Xcode, go to Window->Organizer->Projects, select your project, and press the "Delete..." button next to "Derived data".

If this doesn't work, you can try to do a Product->Clean (Cmd+Shift+k).