Command CompileSwift failed with a nonzero exit code in Xcode 10 [duplicate]

Answer 1

Just adding to this question. My issue didn't have anything to do with CommonCrypto. It created a new Single App application and tested to run. Compiler was complaining about using Swift 4.2

Changing the Swift language to version 4.0 in Build settings fixed the issue. Not sure if this is a bug.

Answer 2

in my case the problem was due to watchkit extension being set to swift 3 while the main project's target was set to swift 4.2

Answer 3

Mine was a name spacing issue. I had two files with the same name. Just renamed them and it resolved.

Always gotta check the 'stupid me' box first before looking elsewhere. : )

Answer 4

For me, just cleaning project works using ShiftCommandK & OptionShiftCommandK.

Answer 5

Currently my build is working. Here you are the steps I tried until it finally worked:

1. Search in the whole project the word CommonCrypto.
2. If you have a Pod containing that header import, remove this Pod from the Podfile and perform a pod install.
3. Clean and build the project.
4. Add again the Pod to the Podfile and perform a pod install.
5. Clean and build the project again using a real device if possible.

And If you don't have that Pod, maybe you can try by making the same steps with some old Pod that you may encounter in your project.

Added information: also If you have some code error inside a Pod, first you need to solve that code problem and then try to compile again the project.

I'm going to copy the changes made in my project.pbxproj. I know it's not very helpful but it's the only thing that have changed in the git difference commit:

Removed: BDC9821B1E9BD1B600ADE0EF /* (null) in Sources */ = {isa = PBXBuildFile; };
Added:   BDC9821B1E9BD1B600ADE0EF /* BuildFile in Sources */ = {isa = PBXBuildFile; };

I hope this can help,

Regards.

Answer 6

This is a known issue with Swift 4.2 and Xcode 10. I found an article here that fixed it for me: https://github.com/Yummypets/YPImagePicker/issues/236

In short, go to your projects build settings, and add a user defined setting named SWIFT_ENABLE_BATCH_MODE and set its value to NO.

Previously, I tried each of the following methods suggested elsewhere (rebuild, exit Xcode, clean and rebuild, purge Derived Data files). None of them worked.

Once I added the user define build setting per the article, Swift then told me the true error. In my case, it was a missing }, but it could be any number of problems.