I\'m getting this error whenever I build in XCode 6 beta 4. It seems to be making my app insanely slow.
Warning: Error creating LLDB
Double Check Build Settings => Valid Architectures for both Project and Target.
Mine used to say: arm64 armv7 i386 (The one causing the error was i386)
I replaced it to : arm64 armv7
I hope that helps.