From http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26042

This source file, when compiled with gcj produces an ICE:

package x;

class One
{
    long l;    // no ICE if this is int, not long
    int b;     // no ICE if this line is gone; type doesn't matter
}

class Two
{
    class Three extends One { }
    Three three () { return new Three (); }
}

The assertion failure is due to:

          /* If this reference slot appears to overlay a slot we think
             we already covered, then we are doomed.  */
          if (offset <= *last_view_index)
            abort ();