Xcode build fails with “fatal error: malformed or corrupted AST file” Crashlytics.h
I recently enabled modules in my Xcode project build settings ("Enable Modules (C and Objective-C)") and now I frequently get the below build error. It works the next time I build (without any changes) but it is annoying because it happens very often (several times an hour). fatal error: malformed or corrupted AST file: 'could not find file '/Users/mpv/dev/project/Crashlytics.framework/Headers/Crashlytics.h' referenced by AST file' note: after modifying system headers, please delete the module cache at '/Users/mpv/Library/Developer/Xcode/DerivedData/ModuleCache/M5WJ0FYE7N06' Crashlytics