Try one of this step
1.cd to your eclipse directory and clean using terminal
./eclipse -clean
2.Restart your machine
Question
I have eclipse 3.8 on Debian testing and it always crashes in some moments. Two examples:
some information from crash when clicking Cancel:
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007ff7d212b4c8, pid=470, tid=140702795228928
#
# JRE version: OpenJDK Runtime Environment (7.0_51-b31) (build 1.7.0_51-b31)
# Java VM: OpenJDK 64-Bit Server VM (24.51-b03 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C [libgobject-2.0.so.0+0x194c8] g_object_get_qdata+0x18
#
Solution
Try one of this step
1.cd to your eclipse directory and clean using terminal
./eclipse -clean
2.Restart your machine