Re: [ jEdit-users ] null pointer exception

[Alan E. <ala...@gm...>]

When that happens, the textarea is confused. Something unthread-safe
caused its counters or other properties to be off, and it needs to be
"reset".
A split + unsplit should allow you to continue working without
disruption. If you can reproduce the steps you took to get to that
point, please post a bug report. It could be related to the particular
combination of plugins you are using and/or the edit mode you are in
so this is a tricky one to track down. But I've seen it too.

it's in the FAQ actually.


On Mon, Sep 13, 2010 at 1:55 AM, e-letter <in...@gm...> wrote:
> Readers,
>
> The following error occurred, navigating to the bottom of an open
> buffer using key combination ctrl+pagedown.
>
> java.lang.NullPointerException
>        at org.gjt.sp.jedit.textarea.TextArea.scrollTo(TextArea.java:881)
>        at org.gjt.sp.jedit.textarea.TextArea.scrollToCaret(TextArea.java:738)
>        at org.gjt.sp.jedit.textarea.TextArea.goToNextPage(TextArea.java:2473)
>        at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)
>        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
>        at java.lang.reflect.Method.invoke(Method.java:600)
>        at org.gjt.sp.jedit.bsh.Reflect.invokeMethod(Reflect.java:134)
>        at org.gjt.sp.jedit.bsh.Reflect.invokeObjectMethod(Reflect.java:80)
>        at org.gjt.sp.jedit.bsh.Name.invokeMethod(Name.java:855)
>        at org.gjt.sp.jedit.bsh.BSHMethodInvocation.eval(BSHMethodInvocation.java:75)
>        at org.gjt.sp.jedit.bsh.BSHPrimaryExpression.eval(BSHPrimaryExpression.java:102)
>        at org.gjt.sp.jedit.bsh.BSHPrimaryExpression.eval(BSHPrimaryExpression.java:47)
>        at org.gjt.sp.jedit.bsh.BSHBlock.evalBlock(BSHBlock.java:130)
>        at org.gjt.sp.jedit.bsh.BSHBlock.eval(BSHBlock.java:80)
>        at org.gjt.sp.jedit.bsh.BshMethod.invokeImpl(BshMethod.java:362)
>        at org.gjt.sp.jedit.bsh.BshMethod.invoke(BshMethod.java:258)
>        at org.gjt.sp.jedit.bsh.BshMethod.invoke(BshMethod.java:186)
>        at org.gjt.sp.jedit.BeanShellFacade.runCachedBlock(BeanShellFacade.java:225)
>        at org.gjt.sp.jedit.BeanShell.runCachedBlock(BeanShell.java:423)
>        at org.gjt.sp.jedit.BeanShellAction.invoke(BeanShellAction.java:73)
>        at org.gjt.sp.jedit.gui.InputHandler.invokeAction(InputHandler.java:352)
>        at org.gjt.sp.jedit.gui.InputHandler.invokeAction(InputHandler.java:317)
>        at org.gjt.sp.jedit.gui.DefaultInputHandler.handleKey(DefaultInputHandler.java:197)
>        at org.gjt.sp.jedit.input.AbstractInputHandler.processKeyEventKeyStrokeHandling(AbstractInputHandler.java:401)
>        at org.gjt.sp.jedit.gui.InputHandler.processKeyEvent(InputHandler.java:151)
>        at org.gjt.sp.jedit.textarea.TextArea.processKeyEvent(TextArea.java:4662)
>        at java.awt.Component.processEvent(Component.java:6052)
>        at java.awt.Container.processEvent(Container.java:2053)
>        at java.awt.Component.dispatchEventImpl(Component.java:4642)
>        at java.awt.Container.dispatchEventImpl(Container.java:2111)
>        at java.awt.Component.dispatchEvent(Component.java:4472)
>        at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1862)
>        at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:717)
>        at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1002)
>        at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:867)
>        at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:688)
>        at java.awt.Component.dispatchEventImpl(Component.java:4514)
>        at java.awt.Container.dispatchEventImpl(Container.java:2111)
>        at java.awt.Window.dispatchEventImpl(Window.java:2476)
>        at java.awt.Component.dispatchEvent(Component.java:4472)
>        at java.awt.EventQueue.dispatchEvent(EventQueue.java:611)
>        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:281)
>        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:196)
>        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:186)
>        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:181)
>        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:173)
>        at java.awt.EventDispatchThread.run(EventDispatchThread.java:134)
>
>
> Yours,
>
> je...@co...
> jedit44p1
> ibmjava160
>
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