As of this morning, Xcode 6.4 stopped launching on my Mac running OS X 10.10.5 Yosemite.
I tried to launch with
sudo open --new /Applications/Xcode.app
LSOpenURLsWithRole() failed with error -10810 for the file /Applications/Xcode.app
I've reinstalled Xcode, but get the same result. I've tried Disk Utility and antivirus software and my system seems to be clean.
Any ideas how I should proceed, short of reinstalling OS X?