Xcode 5 crashes -- Xcode quit unexpectedly

I have also faced this problem. To prevent xCode5 from Crashing follow these steps. Xcdoe > Preferences > Source Control > Uncheck the Enable Source control . After that Xcode will not Crash .. :)

I faced this problem for the first time while using Xcode 6.1.

I had just cloned the project and it was crashing as soon as the Indexing process would start. I disabled source control as suggested in the previous answer and it was still crashing.

In my case, the problem was that the Destination was a device that was connected to my MAC at that time but was not included in any of the Provisioning Profiles that I had installed on my MAC. Changing the Destination to any of the simulators before the Indexing process would start fixed the problem for me.