from terminal try to add repository
ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: software-properties-common 0.96.4
ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0
Uname: Linux 3.19.0-7-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.16.1-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Sun Mar 1 18:16:57 2015
ExecutablePath: /usr/bin/add-apt-repository
InstallationDate: Installed on 2015-03-01 (0 days ago)
InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150224)
InterpreterPath: /usr/bin/python3.4
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/add-apt-repository ppa:/gottcode/gcppa
PythonArgs: ['/usr/bin/add-apt-repository', 'ppa:/gottcode/gcppa']
SourcePackage: software-properties
Title: add-apt-repository crashed with IndexError in mangle_ppa_shortcut(): string index out of range
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
I was able to recreate this on wily.