So I was having an issue where anytime I accessed the Account tab, the Behaviors tab or the Git part of the Source Control tab in the Xcode Preferences menu, it would crash the whole application. The crash was immediate and I would get this as part of the error log.
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_INSTRUCTION (SIGILL) Exception Codes:
0x0000000000000001, 0x0000000000000000 Exception Note:
EXC_CORPSE_NOTIFY Termination Signal: Illegal instruction: 4Termination Reason: Namespace SIGNAL, Code 0x4 Terminating Process:exc handler [1309]