Debugging in eclipse causing system crash

[Padraig Looney]

I'm using ubuntu 14.04 with unity for work (On a Mac Pro and on a Lenovo Thinkpad). I've been debugging some Java code and every time I step inside a given method I have problems and have to restart my machine (4 times now).

The only functionality that remains is the show hide feature of the unity bar. Everything else is gone.

I have just tested this on a Windows machine and I can debug fine.

[Padraig Looney (padraig-looney)]

I've just upgraded this to the latest version of eclipse and the problem remains

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1355182/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Padraig Looney (padraig-looney)]

I've tested it on a different machine with Ubuntu 14.04 and the smae problem exists.

[Padraig Looney (padraig-looney)]

Looking in /var/log/kern.log all I get in ten minutes prior to the crash is

Aug 11 16:58:28 padraig-ThinkPad-T520 kernel: [ 959.114260] SysRq : This sysrq operation is disabled.
Aug 11 16:58:28 padraig-ThinkPad-T520 kernel: [ 959.439232] SysRq : This sysrq operation is disabled.
Aug 11 16:58:28 padraig-ThinkPad-T520 kernel: [ 959.758096] SysRq : This sysrq operation is disabled.
Aug 11 16:58:29 padraig-ThinkPad-T520 kernel: [ 960.033616] SysRq : Emergency Sync
Aug 11 16:58:29 padraig-ThinkPad-T520 kernel: [ 960.200830] SysRq : Emergency Remount R/O

[Padraig Looney (padraig-looney)]

I've tested this in Debian on virtual box and it also crashes the system.

[Padraig Looney (padraig-looney)]

I've tested this on the version of eclipse using apt-get and the issue is there.

[Padraig Looney (padraig-looney)]

I'ce spent a few hours creating a short self contained example. To reproduce this bug. Run the following in debug in eclipse with a breakpoint as directed in the code.

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JComboBox;
import javax.swing.JFrame;

public class WillCrash {

 public static void main(String[] args) {

  JComboBox<String> combo = new JComboBox<>();
  JFrame jf = new JFrame();
  jf.setExtendedState(JFrame.MAXIMIZED_BOTH);
  jf.getContentPane().add(combo);
  combo.addItem("Test 1");
  combo.addItem("Test 2");
  combo.addActionListener(new ActionListener() {

   @Override
   public void actionPerformed(ActionEvent e) {
    //Put break point here to crash your system
    System.out.println("Test");
   }
  });
  jf.setVisible(true);
  jf.pack();

 }

}