In Xcode when compiling my project after adding a file "CDExceptions.swift", I am getting this error. The file contents appear to be making a component "SWBBuildService" in Xcode crash.

When I press the "Reopen" it seems to compound the error with: Now here is where it gets wiggy... when I remove the file from the project, the project compiles fine without Xcode tooling crashes. Add the file back in and Xcode tooling crashes happen.

I copy all the text contents of the file into a new file and add that file to the project. (different file, different name, different location) Same issue. Suggests contents of file. Swift flags nothing in the contents as a problem or warning

Now here is where it gets really strange, I copy all the functions out of "CDExceptions.swift" into one of the regular project files, remove "CDExceptions.swift" from the project, and the compile goes through cleanly as well; no Xcode tool crash, no compile errors. Be aware that "CDExceptions.swift" only contains utility functions... no classes no structs, just a bunch of functions.

And before the questions are asked:

• Cleaned the build folder, deleted the thing at one point, no help
• Remove "CDExceptions.swift" and project builds fine and fails to build immediately upon adding the file "CDExceptions.swift" back in
• Functions from "CDExceptions.swift", when added to the bottom of any pre-existing project file compile fine as long as the "CD Exceptions.swift" file is not in the project. Using the functions that were extracted from "CDExceptions.swift" work as expected
• Renaming file does not help
• Recreating file does not help
• Moving file from one directory to another does not help
• Moving file in the project listing in Xcode, does not help
• Only native code is being used in the project, nothing foreign, no cocopods, no react
• reloaded Xcode from the App Store, does not help

Any ideas about what might be causing this anyone?