The Lang JCK stmt08210 fails both in product and debug mode when run in -Xcomp mode. 
Reproducible in 1.4.1_05; not reproducible in 1.4.2

Here is the test case:

/*
* @(#)stmt08210.java   1.1 02/06/28
*
* Copyright 2002 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
import java.io.PrintStream;

public class stmt08210 {
      static int a1 = 0;
   static int a2 = 0;
   static int a3 = 0;
   static int a4 = 0;
   static int a5 = 0;
   static int a6 = 0;

   static {
       do {
           if (a1 == 2) {
               a6++;
               break;
           }
       } while (++a1 > 0);
          }

   static {
       do {
           if (a3 == 1)
               a5 += 1;
           else                do {
                   if (a1 < 3)
                       a4 += 1;
                   else
                       break;
               } while (a1++ > 0);
       } while (a3++ < 5);
       a2 += 1;
   }

   public static void main(String argv[]) {
       System.exit(run(argv, System.out) + 95/*STATUS_TEMP*/);
   }

   public static int run(String argv[], PrintStream out) {
       if (a1 == 3 && a2 == 1 && a3 == 6 && a4 == 1 && a5 == 1 && a6 == 1)
           return 0/*STATUS_PASSED*/;
       out.println ("failed");
       out.println( a1+" "+a2+" "+a3+" "+a4+" "+a5+" "+a6);
       return 2/*STATUS_FAILED*/;
   }
}


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bash-2.00$  /java/re/jdk/1.4.1_05/promoted/latest/binaries/solaris-sparc/bin/java_g -Xcomp stmt08210
bash-2.00$  /java/re/jdk/1.4.1_05/promoted/latest/binaries/solaris-sparc/bin/java_g -Xcomp -server stmt08210
failed
3 1 6 1 1 0