Xcode 7 encountered a problem

I have a same problem. And I've no idea to fix this problem....

I'm getting this every mintue or so. Rebooted numerous times and can not figure out what is causing it. Super annoying. Trying to work on mostly swift code, so I dont' know if objc is experiencing the same madness. It is happening in Xcode 7 beta2, but even more iritating, it is happening in Xcode 6.4 too... making work pretty much impossible. ugh.

It might be worth looking at this stackoverflow question.

There are some possible solutions given...

http://stackoverflow.com/questions/24006206/sourcekitservice-terminated

I had the same problem in Xcode 6.4 (Xcode 7 beta 2 is also installed). After cleaning up the Derived Data folder the problem disappeared.

I stopped receiving the error when I updated my Xcode to the lastest version.

I'm acutualy working with the last vesion of Xcode 7 but I get the same error
Xcode encountered a problem. Source editor functionality is limited. Attempting to restore...

heeeeeeeeeeeellllllllllllppppppppppppp!!!!!!!!

any help from apple developers?????

I sent it as bug but there is no answer until now and I need to finish my task as soon as possible

I know it's a few months later, but I solved the problem and wanted others to understand it as well.

I had a completion block in my code that the compiler didn't like. Gave me a segmentation fault 11 - and the editor failed.

Why!!?!?!?!?

I simply commented out the completion block syntax and the editor is now back to normal, no segmentation fault 11 and my code now compiles.

Removing IDELanguageSupportCore.ideplugin from Xcode.app/Contents/Plugins solved this problem for me. It disables 'swiftification' in the background, so if you use Swift, you're out of luck.