[DrJava] [ drjava-Bugs-2620601 ] NullPointerException on Compile All

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Bugs item #2620601, was opened at 2009-02-20 11:17
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Category: Language Levels
Group: 4: Serious
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Mathias Ricken (mgricken)
Assigned to: Nobody/Anonymous (nobody)
Summary: NullPointerException on Compile All

Initial Comment:
Set language level to elementary and open the *.dj0 files in the lists directory.
Hit "compile all". The compiler error panel will report a NullPointerException with no source file or line number. This isn't a compiler error actually, it is a DrJava bug. If the stack trace of the NullPointerException is printed, it reveals the origin:

java.lang.NullPointerException
       at edu.rice.cs.javalanglevels.LanguageLevelConverter.convert(LanguageLevelConverter.java:214)
       at edu.rice.cs.drjava.model.compiler.DefaultCompilerModel._compileLanguageLevelsFiles(DefaultCompilerModel.java:346)
       at edu.rice.cs.drjava.model.compiler.DefaultCompilerModel._compileFiles(DefaultCompilerModel.java:312)
       at edu.rice.cs.drjava.model.compiler.DefaultCompilerModel._doCompile(DefaultCompilerModel.java:240)
       at edu.rice.cs.drjava.model.compiler.DefaultCompilerModel.compileAll(DefaultCompilerModel.java:141)
       at edu.rice.cs.drjava.ui.MainFrame._compileAll(MainFrame.java:5226)
       at edu.rice.cs.drjava.ui.MainFrame.access$4800(MainFrame.java:116)
       at edu.rice.cs.drjava.ui.MainFrame$51.actionPerformed(MainFrame.java:819)
       at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1882)
       at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2202)
       at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
       at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
       at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
       at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)
       at java.awt.Component.processMouseEvent(Component.java:5583)
       at javax.swing.JComponent.processMouseEvent(JComponent.java:3135)
       at java.awt.Component.processEvent(Component.java:5348)
       at java.awt.Container.processEvent(Container.java:2010)
       at java.awt.Component.dispatchEventImpl(Component.java:4050)
       at java.awt.Container.dispatchEventImpl(Container.java:2068)
       at java.awt.Component.dispatchEvent(Component.java:3885)
       at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4256)
       at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3936)
       at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3866)
       at java.awt.Container.dispatchEventImpl(Container.java:2054)
       at java.awt.Window.dispatchEventImpl(Window.java:1791)
       at java.awt.Component.dispatchEvent(Component.java:3885)
       at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
       at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
       at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
       at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
       at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
       at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

I'm changing the DrJava code for handling exceptions in our source code to treat them as bugs, bring up the error window and show the stack trace.

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