Xcode build fails with “fatal error: malformed or corrupted AST file” Crashlytics.h

Question

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 b

Answer 1

I hit this issue after updating my version of Xcode via the Mac App Store.

After updating Xcode, the xcode-select Command Line Tools version of Xcode was still set to the old version. This was creating some kind of mismatch in xcodebuild.

I solved the issue like so:

1. Xcode > Preferences > Command Line Tools. Select the newest Xcode version.
2. Quit Xcode
3. Delete the ~/Library/Developer/Xcode/DerivedData directory.
4. Run build script again. Success!

---

For SEO purposes, when I was hitting this issue I saw the following errors:

error: InputFile /Users/user/source/Your-PCH-Prefix.pch 0 1406772618 191 33188... malformed line 9; 'InputFile' should have exactly five arguments

Also:

xcodebuild[53039:5503] stream error: stream error at offset 29: created by an unsupported XCDependencyGraph build
xcodebuild[53039:4e0b] stream error: stream error at offset 29: created by an unsupported XCDependencyGraph build
** BUILD FAILED **


The following build commands failed:
    Write auxiliary files
    MappingModelCompile