Cannot evaluate because of compilation error(s). Occurs within watch expressions.

mpette200 commented 2 years ago

While debugging, watches display "Cannot evaluate because of compilation error(s): ......". This is annoying, and actually the same issue seems to prevent conditional breakpoints from working. This seems to occur whenever an inner class is present within the method.

Environment

Operating System: Microsoft Windows [Version 10.0.19042.1348]
JDK version: jdk-11.0.12
Visual Studio Code version: 1.62.3 (user setup)
Java extension version: Java(TM) by Red Hat v1.1.0
Java Debugger extension version: v0.37.0

Steps To Reproduce

Create the slightly modified "Hello World" by copy / pasting the code below.
Add a breakpoint then debug.
Set a watch expression for msg.length()

import java.util.List;
import java.util.ArrayList;

public class Hello {
    public static void main(String[] args) {

        class Position {
            int x;
            int y;
        }

        String msg = "Hello World";
        List<Position> x = new ArrayList<>();
        System.out.println(msg + x);
    }

}