Bug 82839 [misc] Breakpoint icons disappear
I am using 3.1M4 1 - Open a file and set a breakpoint. The breakpoint icon appears in the left and right margins. 2 - Close the file. 3 - Open the same file. Note the breakpoint icons no longer appear. The breakpoint is still there but the icons don't appear and you can't select them. This is a major problem because I can't see the breakpoints I've previously set so I have to clear those breakpoints and set new ones each time I run a debug session.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/ClassFileMarkerAnnotationModel.java
protected IClassFile fClassFile;
	protected IWorkspace fWorkspace;
	protected IResource fMarkerResource;
	protected boolean fChangesApplied;
	public ClassFileMarkerAnnotationModel(IResource markerResource) {
		super();
		fMarkerResource= markerResource;
		fWorkspace= fMarkerResource.getWorkspace();
	}