While I’ve been encountering more bugs than I can count on both hands while working with XCode, this one takes the cake. Clang (the compiler) was throwing the following errors while it was trying to compile one of its objective C source files (.m extension).

clang: error: unable to execute command: Segmentation fault: 11
clang: error: clang frontend command failed due to signal (use -v to see invocation)
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: arm-apple-darwin14.5.0
Thread model: posix
clang: note: diagnostic msg: PLEASE submit a bug report to http://developer.apple.com/bugreporter/ and include the crash backtrace, preprocessed source, and associated run script.
clang: error: unable to execute command: Segmentation fault: 11
clang: note: diagnostic msg: Error generating preprocessed source(s).

The fix... was to keep the specific source file open in an XCode window ~.~ . How the heck do you integrate the [CLI] compiler so much into the IDE that this could happen? Or is this simply a weird file system thing? I should note that my XCode project directory, with all files, is located on a VMware volume share.