java.lang.NullPointerException
        at org.openide.text.Annotation.attach(Annotation.java:117)
        at org.netbeans.modules.python.debugger.DebuggerAnnotation.<init>(DebuggerAnnotation.java:60)
        at org.netbeans.modules.python.debugger.breakpoints.BreakpointAnnotationListener.addAnnotation(BreakpointAnnotationListener.java:81)
        at org.netbeans.modules.python.debugger.breakpoints.BreakpointAnnotationListener.breakpointAdded(BreakpointAnnotationListener.java:52)
        at org.netbeans.api.debugger.DebuggerManager.fireBreakpointCreated(DebuggerManager.java:791)
        at org.netbeans.api.debugger.DebuggerManager.initBreakpoints(DebuggerManager.java:939)
        at org.netbeans.api.debugger.DebuggerManager.initBreakpoints(DebuggerManager.java:863)
        at org.netbeans.api.debugger.DebuggerManager.getBreakpoints(DebuggerManager.java:583)
        at org.netbeans.modules.python.debugger.breakpoints.PythonBreakpointActionProvider.doAction(PythonBreakpointActionProvider.java:74)
        at org.netbeans.spi.debugger.ActionsProvider$1.run(ActionsProvider.java:105)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)