I have been using Aptana for years now, and have become accustom to its many features.
It has been reliable up until I upgraded from Xubuntu 13.04 to 14.04.
Now
From what i gathered around the internet, it seems to be a problem with webkit, what did the trick for me was removing the library:
apt-get purge libwebkitgtk-1.0-common
The problem is, other programs like the gimp use that library...
Or you may turn off the contextual help like guyfromfl suggested.
I maybe jinxing myself by posting this so soon, but I have gotten Aptana to run stable for about 30 minutes.
What I did was disable the Show information on hover event.
Turn it off by going to Window->Preferences->Aptana Studio->Conent Assist and setting "Show information on hover" to Off.
If this doesn't fix it I will report back, but so far so good.
Credit: Aptana closes unexpectedly
open AptanaStudio3.ini
and append this line to end of file:
-Dorg.eclipse.swt.browser.DefaultType=mozilla
I have the same issues and exactly the same core dump error since upgraded to kubuntu 14.04. So far i have changed/installed the following:
-Install aplication as http://www.samclarke.com/2012/04/how-to-install-aptana-studio-3-on-ubuntu-12-04-lts-precise-pangolin/
-Changed gtk2 theme to qtcurve (after installing qtcurve)
-Added instruction ulimit -c unlimited to AptanaStudio3.sh just before main program
Since these changes i have been working for more than half an hour without problems but can't be sure if the problem has been fixed.
Hope this helps.