As requested:
What caused this error for me (after getting the new Xcode) was I would try to run a project in simulator (accidentally in simulator, I never use simulator), but I’d forget to select my device or my device would become unplugged without me noticing, and it will try to run in simulator… so I would get those classic “.o” file errors… Then I would switch back to my device and get corrupt AST files…
To CURE the problem… (Follow the steps below VERY closely!!!!!)
- Clean your project
- QUIT Xcode (CMD+Q)
- Run this Terminal Command:
rm -rf ~/Library/Developer/Xcode/DerivedData/ModuleCache/* - Run this Terminal Command:
rm -rf ~/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/* - Reopen Xcode
- MAKE SURE YOU HAVE YOUR DEVICE SELECTED AND NOT SIMULATOR
- CLEAN project (Yes, again)
- THEN build (to your device, not to simulator)…
Enjoy!
Note: After further experimentation I’ve found that the force-quitting of xCode is possibly not necessary.