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I had the same error using the latest ROS Indigo build with an uptodate Ubuntu 14.04.

roscore

yielded:

started roslaunch server http://benni-notebook:58480/
ros_comm version 1.11.6


SUMMARY
========

PARAMETERS
 * /rosdistro: indigo
 * /rosversion: 1.11.6

NODES

auto-starting new master
process[master]: started with pid [22300]
ROS_MASTER_URI=http://benni-notebook:11311/

setting /run_id to 6e5bfafc-0db4-11e4-ba26-1867b02b12d1
process[rosout-1]: started with pid [22313]
started core service [/rosout]
[rosout-1] process has died [pid 22313, exit code -11, cmd /opt/ros/indigo/lib/rosout/rosout __name:=rosout __log:=/home/benni/.ros/log/6e5bfafc-0db4-11e4-ba26-1867b02b12d1/rosout-1.log].
log file: /home/benni/.ros/log/6e5bfafc-0db4-11e4-ba26-1867b02b12d1/rosout-1*.log
[rosout-1] restarting process
process[rosout-1]: started with pid [22320]
[rosout-1] process has died [pid 22320, exit code -11, cmd /opt/ros/indigo/lib/rosout/rosout __name:=rosout __log:=/home/benni/.ros/log/6e5bfafc-0db4-11e4-ba26-1867b02b12d1/rosout-1.log].
log file: /home/benni/.ros/log/6e5bfafc-0db4-11e4-ba26-1867b02b12d1/rosout-1*.log
[rosout-1] restarting process

Strangely enough the problem only occured while I was connected to a VPN (using NetworkManager). So I could bypass the issue by simply starting the roscore while not beeing connected to a VPN. I dont know the reason for this behaviour but I did a

gdb rosout

    Starting program: /opt/ros/indigo/lib/rosout/rosout 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7b41cc7 in ros::Transport::Transport() () from /opt/ros/indigo/lib/libroscpp.so
(gdb) bt
#0  0x00007ffff7b41cc7 in ros::Transport::Transport() () from /opt/ros/indigo/lib/libroscpp.so
#1  0x00007ffff7b4d1e0 in ros::TransportTCP::TransportTCP(ros::PollSet*, int) ()
   from /opt/ros/indigo/lib/libroscpp.so
#2  0x00007ffff7b3c828 in ros::ConnectionManager::start() ()
   from /opt/ros/indigo/lib/libroscpp.so
#3  0x00007ffff7b5f049 in ros::start() () from /opt/ros/indigo/lib/libroscpp.so
#4  0x00007ffff7b39d51 in ros::NodeHandle::construct(std::string const&, bool) ()
   from /opt/ros/indigo/lib/libroscpp.so
#5  0x00007ffff7b3a03f in ros::NodeHandle::NodeHandle(std::string const&, std::map<std::string, std::string, std::less<std::string>, std::allocator<std::pair<std::string const, std::string> > > const&) () from /opt/ros/indigo/lib/libroscpp.so
#6  0x0000000000407ca1 in main ()