add-apt-repository crashed with IndexError in mangle_ppa_shortcut(): string index out of range

[g. pellegrino]

error appears immeditely after login

ProblemType: Crash
DistroRelease: Ubuntu 15.10
Package: software-properties-common 0.96.10
ProcVersionSignature: Ubuntu 4.2.0-7.7-generic 4.2.0
Uname: Linux 4.2.0-7-generic x86_64
ApportVersion: 2.18.1-0ubuntu1
Architecture: amd64
Date: Fri Sep 11 22:58:18 2015
ExecutablePath: /usr/bin/add-apt-repository
InstallationDate: Installed on 2015-09-11 (0 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150825)
InterpreterPath: /usr/bin/python3.4
PackageArchitecture: all
ProcCmdline: /usr/bin/python3 /usr/bin/add-apt-repository ppa::synapse-core/ppa
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 LANGUAGE=it
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/add-apt-repository', 'ppa::synapse-core/ppa']
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:

[Launchpad Janitor (janitor)]

This bug was fixed in the package software-properties - 0.96.13

---------------
software-properties (0.96.13) wily; urgency=medium

  * Properly parse a ppa which has a leading slash, something which a lot of
    people seem use as an argument to add-apt-repository. (LP: #1426933)

 -- Brian Murray <email address hidden> Tue, 13 Oct 2015 11:31:14 -0700