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Tested in build 200212060100, JDK1.4.1. Steps to reporoduce: - run IDE - create a new class and set one breakpoint there - create a new JSP file - execute JSP - approve dialog to change FS to Web module - following NPE is thrown: java.lang.NullPointerException at org.netbeans.modules.debugger.support.java.JavaLineBreakpointEvent$LineBreakpointUpdater.fileSystemsRemoved(JavaLineBreakpointEvent.java:622) at org.netbeans.modules.debugger.support.java.BreakpointUpdater$LazyRepositoryListener.run(BreakpointUpdater.java:521) at org.openide.util.Task.run(Task.java:136) [catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:629)
I have changed version from 4.0 dev to S1S 4.2 (Nevada) Note: No exception is thrown in build 200301060100, but I don't know why source editor is closed during filesystem is changed to the web module.
This bug is related to bug #29357 ("NPE on unmounting filesystem").
fixed in the main trunk
Verified in build 200301080100.