Description Martin Mathew 2014-02-23 23:56:50 EST

Using  Kepler SR2 + Java 8 RC1 + Eclipse Java Development Tools Patch for Java 8 Support (BETA) 1.0.0.v20140223-2022, consider the below code snippet:
package p1;
import java.io.*;
import java.util.function.IntConsumer;

public class QuickSerializedLambdaTest {
	interface X extends IntConsumer,Serializable{}
	public static void main(String[] args) throws IOException, ClassNotFoundException {
		X x1 = i -> System.out.println(i);// lambda expression
		X x2 = System::exit; // method reference
		ByteArrayOutputStream debug=new ByteArrayOutputStream();
		try(ObjectOutputStream oo=new ObjectOutputStream(debug))
		{
			oo.writeObject(x1); // TODO: Add breakpoint in this line
			oo.writeObject(x2);
		}
		try(ObjectInputStream oi=new ObjectInputStream(new ByteArrayInputStream(debug.toByteArray())))
		{
			X x=(X)oi.readObject();
			x.accept(42);// shall print "42"
			x=(X)oi.readObject();
			x.accept(0);// shall exit
		}catch(Exception e){
			e.printStackTrace();
		}
		throw new AssertionError("should not reach this point");
	}
}

Add a breakpoint inside the main method and debug as Java Application. When the breakpoint is hit, a popup dialog is displayed saying: "Unable to install breakpoint in p1.QuickSerializedLambdaTest$X due to missing line number attributes. Modify compiler options to generate line number attributes.
Reason:
	Absent Line Number Information"
As mentioned in bug 135027, executed  "javap -l". Below is the result:

Compiled from "QuickSerializedLambdaTest.java"
public class p1.QuickSerializedLambdaTest {
  public p1.QuickSerializedLambdaTest();
    LineNumberTable:
      line 5: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       5     0  this   Lp1/QuickSerializedLambdaTest;

  public static void main(java.lang.String[]) throws java.io.IOException, java.l
ang.ClassNotFoundException;
    LineNumberTable:
      line 8: 0
      line 9: 6
      line 10: 12
      line 11: 20
      line 11: 26
      line 13: 36
      line 14: 42
      line 15: 48
      line 16: 107
      line 16: 113
      line 18: 133
      line 19: 143
      line 20: 152
      line 21: 162
      line 22: 170
      line 23: 231
      line 25: 236
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0     246     0  args   [Ljava/lang/String;
          6     240     1    x1   Lp1/QuickSerializedLambdaTest$X;
         12     234     2    x2   Lp1/QuickSerializedLambdaTest$X;
         20     226     3 debug   Ljava/io/ByteArrayOutputStream;
         36      37     6    oo   Ljava/io/ObjectOutputStream;
        133      62     6    oi   Ljava/io/ObjectInputStream;
        143      27     7     x   Lp1/QuickSerializedLambdaTest$X;
        231       5     4     e   Ljava/lang/Exception;
}

Why is this dialog coming up?