Created attachment 119641 [details]
Test case

How to reproduce:

- Start GlassFish in Debug mode
- Open the attached Maven project
- Open HomePage.java
- Set breakpoint on first line in method
  public static void checkIfPageStateless(Page page) {
  on
  if (!page.isPageStateless()) {
- In Projects Window, right click on project node|Debug| and select GlassFish server permanently
- the debugger breaks on the breakpoint fine - resume
Result:
LineBreakpoint HomePage.java : 91 successfully submitted.
User program running
Breakpoint hit at line 91 in class com.mycompany.HomePage by thread http-thread-pool-8080(5).

- In mentod public DetailForm(String id, IModel<String> model) {
  add two lines line so that all lines including the breakpoint after are pushed down by two lines
  
before:
			Button submitButton1 = new Button("submit1");//submitButton1 = new Button("submit1");
            add(submitButton1);
after:
            Button submitButton1 = new Button("submit1");
            //submitButton1 = new Button("submit1");
            
            add(submitButton1);
  
- debug the project as above.

Result:

Thread http-thread-pool-8080(5) stopped at HomePage.java:91.
User program running
Not able to submit breakpoint LineBreakpoint HomePage.java : 93, reason: No executable location available at line 91 in class com.mycompany.HomePage.
Invalid LineBreakpoint HomePage.java : 93