Please run the attached test programs(Test1.java) using Client VM or take a look at
the attached test result(result.txt). You'll notice that a variable(pre)'s value
is unexpectedly changed from true to false (at line 34 in result.txt) in the middle
of execution.
Based on circumstantial evidence, we think there is a bug in client VM.

Additional info:
  - This bug is reproducible only with Client VM. Not reproducible with -server nor -Xint.
  - This bug is not always reproducible. Please run the test program several times if you
    don't see the symptom.
  - Interestingly, this bug becomes non-reproducible
      * if you comment out the assignment expression to a variable(brk) at line 17
        or the "for" loop at line 27
      - or -
      * if you rearrange the order of two variable definitions at line 4 and 5.
            boolean brk = true;
            boolean pre = false;
Posted Date : 2007-01-13 00:20:33.0

According to the original bug reporter, this can be reproducible with a break statement with a label as well as a continue statement.
Posted Date : 2007-01-13 00:19:30.0

N/A

This appears to be a problem with the processing of phis.  I'm still trying to identify what's going wrong.  Here's a simplified test case.

public class Test1 {

    static int dummy;

    private static void error() {
        throw new InternalError("");
    }
    private static void ok() {
        System.out.println("true");
    }

    protected static void doSomething() {
        boolean brk = true;
        boolean pre = false;

        for(int i = 0; i < 2; ++i){
            int j = 0;

            while(j < 1){
                ++j;
                if(i == 0){
                    pre = brk;
                    brk = false;
                    continue;
                }
                if (pre == false) error();
            }
        }

        for (int i = 0; i < 1000; ++i);
    }

    public static void main(String[] args) {
        for(int i = 0; i < 5; i++){
            doSomething();
            // System.out.println((i+1) + " ----------------------");
        }
    }

}
Posted Date : 2007-01-12 15:23:22.0