i found my problem here:
how to fix “Failed to write core dump. Core dumps have been disabled” error while running java
and
here:
Eclipse crashing on startup
and here:
Eclipse continue crash

Nothing help me;

This is the problem:

# A fatal error has been detected by the Java Runtime Environment:

#

#  SIGSEGV (0xb) at pc=0x00007fa434ffc2a1, pid=6989, tid=140346763503360

#

# JRE version: Java(TM) SE Runtime Environment (7.0_55-b13) (build 1.7.0_55-b13)

# Java VM: Java HotSpot(TM) 64-Bit Server VM (24.55-b03 mixed mode linux-amd64 compressed oops)

# Problematic frame:

# C  [libsoup-2.4.so.1+0x6c2a1]  soup_session_feature_detach+0x11

#

# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

#

# If you would like to submit a bug report, please visit:

#   http://bugreport.sun.com/bugreport/crash.jsp

# The crash happened outside the Java Virtual Machine in native code.

# See problematic frame for where to report the bug.

I did this:
To enable core dumping, try "ulimit -c unlimited" before starting Java again
and also not help;

I tried to upgrade, but i had dependency problems.

In the last few days i tried to install Cisco packet Tracer, this mean i install and uninstall some stuff (like ia386 - something - i dont remember the package name).

If i cant fix this, I thinking to do a fresh installation of ADT or over to Intellij.

To do a fresh installation (how i should backup all my plugins?)