The next test gives assert when run with -server only.

jaberwocky% uname -a
SunOS jaberwocky 5.9 Generic sun4u sparc SUNW,Ultra-60

jaberwocky% cat Test.java
/*
   java_g -server -Xcomp -XX:CompileOnly=Test Test

*/

import java.lang.String;

class OopTestException extends java.lang.RuntimeException {
  public OopTestException(String s) {
    super (s);
  }
}

class OopTest {
   public int x;
   public int y;
   public int getX() { return x; }
   public int getY() { return y; }
   public OopTest(int ii) {
     if (ii < 0) {
       throw new OopTestException("bad init value: " + ii);
     }
     x = ii;
     y = ii*2;
   }
}

class Oop {
   public OopTest createOopTest(int ii) { return new OopTest(ii); }
}

public class Test {
  static int imax = 10;
  static int y1 = -1;
  static int y2 = 1;

  private static String test(int y) {
    String msg = "";
    Oop op = new Oop();
    for (int x= 0; x<imax; x++) {
      msg = "test " + x;
      boolean caught = false;
      OopTest ot = null;
      try {
        ot = op.createOopTest(x);
      } catch(OopTestException e) {caught = true;}

      boolean result = false;
      if (caught && y<=0) { result = true; }
      if (caught && y>0) { result = false; msg += " caught failed"; }

      if (!caught) {
        result = ( ot.getX() == x && ot.getY() == x*2);
      }

      if (!result && !caught) { msg += " x: " + ot.getX() + " y: " + ot.getY(); }
      msg += '\n';
    }

    return msg;
  }

  public static void main(String args[]) {
    String s = "";
    s = test(y1);
    s = test(y2);
  }
}

jaberwocky% /java/re/jdk/1.5.0/latest/binaries/solaris-sparc/bin/java_g -server -Xcomp -XX:CompileOnly=Test Test
VM option 'CompileOnly=Test'
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/buildOopMap.cpp:208]
#
# An unexpected error has been detected by HotSpot Virtual Machine:
#
# Internal Error (/BUILD_AREA/jdk1.5.0/hotspot/src/share/vm/opto/buildOopMap.cpp, 208 [ Patched ]), pid=16367, tid=8
#
# Java VM: Java HotSpot(TM) Server VM (1.5.0-beta2-b33-debug compiled mode)
#
# Error: assert(def,"since live better have reaching def")
# An error report file with more information is saved as hs_err_pid16367.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#
Current thread is 8
Dumping core ...
Abort
jaberwocky% /java/re/jdk/1.4.2_03/latest/binaries/solaris-sparc/bin/java_g -server -Xcomp -XX:CompileOnly=Test Test
VM option 'CompileOnly=Test'
jaberwocky%